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Multiferroic Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3-NiFe2O4 composite film and preparation method thereof
The invention discloses a multiferroic Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3-NiFe2O4 composite film and a preparation method thereof. The composite film comprises a Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 crystalline state film and a NiFe2O4 crystalline state film which are compounded together. The preparation method comprises the following steps: respectively preparing a Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 precursor solution and a NiFe2O4 precursor solution; and spinning on a substrate to prepare a multilayer NiFe2O4 film, and spinning on the NiFe2O4 film to prepare a multilayer Bi0.96-xSr0.04RExFe0.94Mn0.04Cr0.02O3 film, thereby obtaining the target product. The equipment requirement is simple, the prepared film is high in uniformity, the doping amount is easy to control, and the ferroelectric properties and ferromagnetic properties of the film are greatly improved. Meanwhile, the leakage current density of the film is effectively reduced.
Owner:SHAANXI UNIV OF SCI & TECH
Mpg-C3N4/BiPO4 compound photocatalyst and preparing method and application thereof
InactiveCN105214707ALarge specific surface areaGood catalyst carrierPhysical/chemical process catalystsWater/sewage treatment by irradiationMicrowaveAlcohol
The invention discloses an mpg-C3N4 / BiPO4 compound photocatalyst and a preparing method and application thereof. The preparing method includes the steps that with melamine serving as a raw material, mpg-C3N4 powder is synthesized through a hard template method; with Bi(NO3)3.5H2O and Na3PO4.12H2O serving as raw materials, BiPO4 powder is synthesized through a microwave hydrothermal method; the mpg-C3N4 powder is put into ethyl alcohol to be dispersed ultrasonically, then the BiPO4 powder is added, ultrasonic dispersion continues, after dispersion is completed, the mixture is stirred for a period of time continuously, and the obtained product is washed and dried to obtain the mpg-C3N4 / BiPO4 compound photocatalyst. The process of the preparing method is simple and easy to control, the requirement for equipment is low, experiment conditions can be reached easily, cost is low, and the prepared mpg-C3N4 / BiPO4 compound photocatalyst has excellent photocatalytic performance, can be used for degrading organics and environmental pollutants and has wide application prospects.
Owner:SHAANXI UNIV OF SCI & TECH
Method for preparing Bi0.85Sm0.15Fe1-xCrxO3 ferroelectric film via sol-gel process
The invention discloses a method for preparing a Bi0.85Sm0.15Fe1-xCrxO3 ferroelectric film via a sol-gel process. The method is carried out by the following steps of: washing an FTO (Fluorinedoped Tin Oxide) substrate and subsequently irradiating via ultraviolet light; using bismuth nitrate, ferric nitrate, samarium nitrate and chromic nitrate as raw materials (the bismuth nitrate excesses by 5%), dissolving the above raw materials in mixed ethylene glycol monomethyl ether and acetic anhydride according to a mole ratio of 0.90: (1-x):0.15:x (x is 0.00, 0.01, 0.02 or 0.03), then adding ethanol amine to adjust a viscosity and obtain a stable BiFeO3 (bismuth ferrite) precursor solution with a metal ion concentration of 0.003-0.3mol / L; and homogenizing and subsequently obtaining a dry film, then using a layer-by-layer annealing process to obtain a crystal-state Bi0.85Sm0.15Fe1-xCrxO3 ferroelectric film. The method disclosed by the invention has the advantages of simple device requirement, easy achievement of experiment condition, good uniformity of the prepared films and easy control of the doping amount, so that the ferroelectric performance of the film is greatly enhanced.
Owner:SHAANXI UNIV OF SCI & TECH
Method for preparing Gd and Co codoped high-remanent-polarization BiFeO3 thin film by sol-gel method
ActiveCN103073064AImprove multiferroic performanceImprove ferroelectric propertiesIron compoundsEthylene glycol monomethyl etherSol-gel
The invention provides a method for preparing a Gd and Co codoped high-remanent-polarization BiFeO3 thin film by a sol-gel method. The method comprises the steps that Bi(NO3)3*5H2O, Fe(NO3)3*9H2O, Gd(NO3)3*6H2O and Co(NO3)2*6H2O are dissolved in ethylene glycol monomethyl ether, and then heated and stirred in an 80 DEG C water bath for 1h; acetic anhydride is added and stirred for 1h; a BiFeO3 precursor solution is obtained and stands for 24h; an FTO (Fluorinedoped Tin Oxide) / glass substrate is subjected to spin coating with the BiFeO3 precursor solution for preparing a thin film; the thin film is subjected to rapid annealing at 550 DEG C, and then cooled to a room temperature; and spin coating and rapid annealing processes are repeated till the BiFeO3 thin film with the required thickness is prepared. The adopted sol-gel method does not require expensive equipment, and is suitable for preparing the thin film on a large surface and a surface with an irregular shape; in addition, chemical constituents are precise and controllable; the ferroelectric property of the prepared BiFeO3 thin film is improved under coaction of Gd and Co.
Owner:盐城市枯枝牡丹旅游开发投资有限公司
Multiferroic Bi1-xRExFe0.97-yMn0.03TMyO3/CoFe2O4 composite film and preparation method thereof
ActiveCN104538140AImprove multiferroic propertiesImprove ferroelectric propertiesInorganic material magnetismInductances/transformers/magnets manufactureComposite filmMultiferroics
The invention provides a multiferroic Bi1-xRExFe0.97-yMn0.03TMyO3 / CoFe2O4 composite film and a preparation method thereof. The composite film comprises a Bi1-xRExFe0.97-yMn0.03TMyO3 crystalline state film and a CoFe2O4 crystalline state film. The preparation method comprises the following steps of respectively preparing Bi1-xRExFe0.97-yMn0.03TMyO3 precursor solution and CoFe2O4 precursor solution; spin coating on a substrate to prepare a plurality of layers of CoFe2O4 films, spin coating on the CoFe2O4 films to prepare a plurality of layers of Bi1-xRExFe0.97-yMn0.03TMyO3 films and accordingly obtaining a target product. According to the multiferroic Bi1-xRExFe0.97-yMn0.03TMyO3 / CoFe2O4 composite film and the preparation method thereof, the device requirement is simple, the prepared film is good in homogeneity, the doping content is easy to control, the ferroelectric property and the ferromagnetic property of the film are improved to a large extent, and the film is high in residual polarization value and residual polarization value.
Owner:SHAANXI UNIV OF SCI & TECH
Layer-by-layer alternatively doped low-leakage-current BiFeO3 film and preparation method thereof
ActiveCN103601250AReduce generationImprove insulation performanceIron compoundsNitrateAcetic anhydride
The invention discloses a layer-by-layer alternatively doped low-leakage-current BiFeO3 film and a preparation method thereof. The preparation method comprises the steps of dissolving bismuth nitrate, ferric nitrate and nitric acid into mixed liquid of ethylene glycol monomethyl ether and acetic anhydride so as to obtain a precursor solution A; dissolving bismuth nitrate, ferric nitrate and samarium nitrate in mixed liquid of ethylene glycol monomethyl ether and acetic anhydride so as to obtain a precursor solution B; coating the precursor solution A on a FTO / glass substrate by way of spin coating, baking and annealing the FTO / glass substrate so as to obtain a Tb doped crystalline BiFeO3 film, coating the precursor solution B on the Tb doped crystalline BiFeO3 film by way of spin coating, baking and annealing the Tb doped crystalline BiFeO3 film so as to obtain a Sm doped crystalline BiFeO3 film, and alternatively preparing the Tb doped crystalline BiFeO3 film and the Sm doped crystalline BiFeO3 film on the Sm doped crystalline BiFeO3 film so as to obtain the layer-by-layer alternatively doped low-leakage-current BiFeO3 film. The method disclosed by the invention adopts a sol-gel process, and is simple in equipment requirements and suitable for preparing films on large surfaces and irregularly-shaped surfaces, and chemical components are precise and controllable.
Owner:盐城市鹤业实业投资有限公司
Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3/Mn(1-x)CoxFe2O4 composite film and preparation method thereof
The invention provides a Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3 / Mn(1-x)CoxFe2O4 composite film and a preparation method thereof. The composite film comprises a Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3 crystalline-state film and a Mn(1-x)CoxFe2O4 crystalline-state film which are compounded together. The preparation method comprises the following steps: respectively preparing a Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3 precursor solution and a Mn(1-x)CoxFe2O4 precursor solution; then spinning on a substrate to prepare a multi-layer Mn(1-x)CoxFe2O4 film; and spinning on the Mn(1-x)CoxFe2O4 film to prepare a multi-layer Bi0.90Er0.10Fe0.96Co0.02Mn0.02O3 film which is the target product. In the invention, the equipment requirements are simple, the prepared film has relatively good uniformity, the doping amount is easy to control, the ferroelectric property and ferromagnetic property of the film are remarkably improved, and the leak current density of the film is effectively reduced at the same time.
Owner:SHAANXI UNIV OF SCI & TECH
Multiferroic Bi(0.98-x)Sr0.02RExFe0.97Mn0.03O3-CuFe2O4 composite film and preparation method thereof
The invention discloses a multiferroic Bi(0.98-x)Sr0.02RExFe0.97Mn0.03O3-CuFe2O4 composite film and a preparation method thereof. The composite film comprises Bi(0.98-x)Sr0.02RExFe0.97Mn0.03O3 crystal films and CuFe2O4 crystal films which are composited together. The preparation method comprises the following steps: firstly, preparing a Bi(0.98-x)Sr0.02RExFe0.97Mn0.03O3 precursor solution and a CuFe2O4 precursor solution respectively; secondly, preparing multiple layers of CuFe2O4 films on a substrate by spin coating, and preparing multiple layers of Bi(0.98-x)Sr0.02RExFe0.97Mn0.03O3 films on the CuFe2O4 films by spin coating to obtain a target product. The equipment requirement is simple, the uniformity of the prepared film is high, the doping amount is easy to control, the ferroelectric and ferromagnetic properties of the film are improved, and the leakage current density of the film is effectively reduced.
Owner:SHAANXI UNIV OF SCI & TECH
Bi0.9Er0.1Fe1-xCoxO3 film with high ferromagnetism and ferroelectricity, and making method thereof
The invention provides a Bi0.9Er0.1Fe1-xCoxO3 film with high ferromagnetism and ferroelectricity, and a making method thereof. The method comprises the following steps: preparing a Bi0.9Er0.1Fe1-xCoxO3 precursor solution from bismuth nitrate, iron nitrate, cobalt nitrate and erbium nitrate, spin-coating a substrate with the Bi0.9Er0.1Fe1-xCoxO3 (x is 0.01-0.03) precursor solution, uniformly sizing, drying, and annealing to obtain the Bi0.9Er0.1Fe1-xCoxO3 film with high ferromagnetism and ferroelectricity. The method has the advantages of simple device requirements, easy reaching of experiment conditions, easy control of the doping amount, and great improvement of the ferromagnetism of a BiFeO3 film, and the Bi0.9Er0.1Fe1-xCoxO3 film made in the invention has the advantages of good uniformity, high magnetic intensity and high remanent polarization.
Owner:SHAANXI UNIV OF SCI & TECH
Bi0.92Ho0.08Fe0.97Mn0.03O3-Zn1-xNixFe2O4 multiferroic composite film and preparation method thereof
The invention discloses a Bi0.92Ho0.08Fe0.97Mn0.03O3-Zn1-xNixFe2O4 multiferroic composite film and a preparation method thereof. The composite film comprises a Bi0.92Ho0.08Fe0.97Mn0.03O3 crystalline film and a Zn1-xNixFe2O4 crystalline film, which are compounded together. The method comprises the following steps: firstly, respectively preparing a Bi0.92Ho0.08Fe0.97Mn0.03O3 polymeric precursor solution and a Zn1-xNixFe2O4 precursor solution during preparation; spinning on a substrate, and preparing a multi-layer Zn1-xNixFe2O4 film; and spinning on the Zn1-xNixFe2O4 film and preparing a multi-layer Bi0.92Ho0.08Fe0.97Mn0.03O3-Zn1-xNixFe2O4 film, so as to obtain a target product. The method disclosed by the invention is simple in demands on equipment; the prepared film is good in uniformity; the doping amount is easy to control; the ferroelectric properties and the ferromagnetic properties of the film are improved; and meanwhile, the leakage current density of the film is effectively reduced.
Owner:SHAANXI UNIV OF SCI & TECH
Preparation method and application of hollow tin alloy nanoparticles with a particle size of less than 50 nm
ActiveCN103441243ASmall particle sizeUniform particle sizeMaterial nanotechnologyCell electrodesWater bathsLithium-ion battery
The present invention relates to a preparation method and an application of hollow tin alloy nanoparticles with a particle size of less than 50 nm. The preparation method comprises: preparing a stannous sulfate solution with a concentration of 0.01-0.04 g / ml, weighing polyvinylpyrrolidone, and adding to the stannous sulfate solution to form a solution A; preparing a sodium borohydride aqueous solution with a concentration of 0.002-0.008 g / ml to obtain a solution B; adding the solution A to the solution B in a dropwise manner to obtain black particles; and preparing a copper chloride dehydrated alcohol solution C with a concentration of 0.0015-0.006 g / ml, adding the prepared tin nanoparticles to the solution C, carrying out water bath heating to achieve a temperature of 60-80 DEG C, and carrying out a reaction for 2-5 h under a N2 protection condition. According to the present invention, the prepared hollow tin alloy nanoparticles have a particle size of less than 50 nm, and have a uniform particle size, the experiment method is simple, experiment conditions are easy to achieve, and the nanometer material can be used for lithium ion battery negative electrode materials.
Owner:北京传奇优声文化传媒有限公司
Bi(1-x)RExFe0.96Co0.02Mn0.02O3 ferroelectric film and preparation method thereof
The invention provides a Bi(1-x)RExFe0.96Co0.02Mn0.02O3 ferroelectric film and a preparation method thereof. The preparation method comprises the following steps: preparing a Bi(1-x)RExFe0.96Co0.02Mn0.02O3 precursor solution from bismuth nitrate, ferric nitrate, cobalt nitrate, manganese acetate and nitric acid RE which serve as raw materials, wherein x is 0.06-0.12, and RE is La, Eu or Er; and coating the precursor solution on a substrate in a spinning manner, uniformly coating, baking and annealing to obtain the Bi(1-x)RExFe0.96Co0.02Mn0.02O3 ferroelectric film. By adopting the method, requirement for equipment is simple, the experiment condition can be easily achieved, the doping amount can be easily controlled, and the ferroelectric performance of the film can be greatly improved, so that the prepared Bi(1-x)RExFe0.96Co0.02Mn0.02O3 ferroelectric film has good uniformly, less current leakage and high remanent polarization.
Owner:SHAANXI UNIV OF SCI & TECH
Multiferroic Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3-CuFe2O4 composite film and preparation method thereof
ActiveCN105906221APrevent volatilizationInhibition transitionCoatingsLeakage current densityComposite film
The invention discloses a multiferroic Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3-CuFe2O4 composite film and a preparation method thereof. The composite film comprises a Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3 (x=0.01-0.05) crystalline film in the upper layer and a CuFe2O4 crystalline film in the lower layer. The preparation method comprises respectively preparing a Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3 precursor solution and a CuFe2O4 precursor solution, carrying out spin-coating on a substrate with multiple CuFe2O4 films and carrying out spin-coating on the CuFe2O4 film with multiple Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3 films to obtain the multiferroic Bi0.83Pr0.15Sr0.02Fe0.97-xMn0.03CuxO3-CuFe2O4 composite film. The preparation method has simple equipment requirements, can prepare the film with good uniformity, easily controls a doping amount, improves ferroelectric and ferromagnetic properties of the film and effectively reduces film leakage current density.
Owner:SHAANXI UNIV OF SCI & TECH
High-molecular-weight soluble elementary sulfur/terpene copolymer, and preparation method and application of same
The invention discloses a high-molecular-weight soluble elementary sulfur / terpene copolymer, and a preparation method and an application of same. The preparation method includes the following steps: 1) heating elementary sulfur in nitrogen gas and a vulcanization accelerator until the elementary sulfur is fused completely, adding terpene, and uniformly mixing the components; 2) increasing temperature of the reaction system to 150-240 DEG C to perform a reaction for 0.5-6.0 h, and purifying a product to obtain a sulfur-rich oligomer; 3) dissolving the sulfur-rich oligomer and removing oxygen, adding an oxidant to perform a reaction at 20-80 DEG C for 0.5-8.0 h, and purifying the product to prepare the elementary sulfur / terpene copolymer. The invention, for the first time, discloses a process of synthesizing the high-molecular-weight soluble elementary sulfur / terpene copolymer from sulfur and terpene, and overcomes the defect that an elementary sulfur / terpene copolymer in the prior art is low in molecular weight and is limited in application. The raw materials in the invention are low in cost and easy to obtain; by means of the sulfur, resource waste is effectively avoided. The preparation method has simple processes, employs easy experimental conditions, and is high in reaction yield.
Owner:GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
B-site Mn and Cu codoped high remanent polarization BiFeO3 film and preparation method
ActiveCN103613144AImprove multiferroic propertiesDistortionIron compoundsIonEthylene glycol monomethyl ether
The invention relates to a B-site Mn and Cu codoped high remanent polarization BiFeO3 film and a preparation method, the method comprises the following steps: dissolving bismuth nitrate, ferric nitrate, manganese acetate and cupric nitrate according to mol ratio of 1.05: [(0.92-0.98)-x]: (0.02-0.08):x in a mixed liquor of ethylene glycol monomethyl ether and acetic anhydride, then uniformly stirring to obtain a BiFeO3 precursor; wherein total metal ion concentration of the BiFeO3 precursor is 0.1-0.5mol / L, X is 0.01-0.03; performing spin coating of the BiFeO3 precursor on a FTO / glass substrate to prepare a wet membrane, baking the wet membrane to obtain a dry membrane, then annealing at 550 DEG C to obtain the crystalline state BiFeO3 film; cooling the crystalline state BiFeO3 film, and repeatedly making the crystalline state BiFeO3 film to reach a required thickness to obtain the B-site Mn and Cu codoped high remanent polarization BiFeO3 film. According to the invention, a sol gel technology is employed, the equipment requirement is simple, the film is prepared on large surface and surfaces with irregular shapes, the chemical component is accurate and controllable, and the regulation and control to its crystal structure can be carried out by codoping thereby the ferroelectric performance of the film is greatly increased.
Owner:盐城梦心缘鞋服有限公司
Manganese dioxide-porous carbon composite material as well as preparation method and application thereof
InactiveCN111048324ACoated evenlyThe experimental method is simpleMaterial nanotechnologyHybrid capacitor electrodesCarbon compositesPorous carbon
The invention discloses a manganese dioxide-porous carbon composite material as well as a preparation method and application thereof. KMnO4 is reduced by utilizing porous carbon, and uniform MnO2 nanoparticles are obtained on the surface of the porous carbon, so that the conductivity of MnO2 is further improved, and the structural damage of MnO2 in an electrochemical cycle process is reduced. Under the current density of 0.5Ag<-1>, the capacity can be stabilized at 215F g<-1>. The method effectively improves the low conductivity of the traditional supercapacitor electrode material MnO2 and thepulverization shedding phenomenon caused by the stress generated in the oxidation-reduction cycle process. Therefore, the MnO2 / porous carbon composite material has a wide application prospect in theaspect of improving the conductivity and the stability of the supercapacitor electrode material.
Owner:TIANJIN UNIV
Bi1-xRExFeO3/CoFe2O4 multiferroic composite membrane and preparation method thereof
ActiveCN104538139APrecise and controllable chemical compositionSimple equipment requirementsInorganic material magnetismInductances/transformers/magnets manufactureChemistryChemical composition
The invention provides a Bi1-xRExFeO3 / CoFe2O4 multiferroic composite membrane and a preparation method thereof. The composite membrane comprises a Bi1-xRExFeO3 crystalline state membrane and a CoFe2O4 crystalline state membrane which are combined together, wherein RE is Ce, Pr, Tb, Eu or Yb, x is equal to 0.05-0.15; in the preparation, Bi1-xRExFeO3 precursor solution and CoFe2O4 precursor solution are firstly prepared respectively; and then, multi-layer CoFe2O4 membrane is prepared by spinning on a substrate, and the multi-layer Bi1-xRExFeO3 membrane is prepared by spinning on the CoFe2O4 membrane, so the target product is obtained. The facility request is simple, the homogeneity of the prepared membrane is good, the chemical composition can be accurately controlled, the doping content is easily controlled, and the ferroelectric property and ferromagnetic property of the membrane are greatly improved, so the Bi1-xRExFeO3 / CoFe2O4 multiferroic composite membrane has high residual polarization value and residual magnetization value.
Owner:SHAANXI UNIV OF SCI & TECH
Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film and preparation method thereof
The invention provides a Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film and a preparation method thereof. The method comprises the following steps: preparing a Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 precursor solution from bismuth nitrate, praseodymium nitrate, hydrogen nitrate AE, ferric nitrate and manganous nitrate, wherein AE is Sr, Ca or Ba, and x=0.02-0.05; spinning the precursor solution on a substrate; and then spinning, drying and annealing, so as to obtain the Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film. The Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film is simple in demands on equipment; the experiment condition is easy to achieve; the doping amount is easy to control; the ferroelectric property of the film can be greatly improved; and the prepared Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film is good in uniformity, low in leakage current, and low in coercive field, and has relatively high remanent polarization.
![Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film and preparation method thereof](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/d33c2ba5-ceec-44cc-a709-6bfddffa1e71/HDA0000631192430000011.PNG "Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film and preparation method thereof")
![Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film and preparation method thereof](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/d33c2ba5-ceec-44cc-a709-6bfddffa1e71/HDA0000631192430000012.PNG "Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film and preparation method thereof")
![Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film and preparation method thereof](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/d33c2ba5-ceec-44cc-a709-6bfddffa1e71/HDA0000631192430000021.PNG "Bi[0.85-x]Pr0.15AExFe0.97Mn0.03O3 ferroelectric film and preparation method thereof")
Owner:SHAANXI UNIV OF SCI & TECH
Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film and preparation method thereof
InactiveCN104478230AReduce defectsReduce leakage conduction currentCoatingsMANGANESE ACETATEMultiferroics
The invention provides a Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film and a preparation method thereof. The method comprises the following steps: preparing a Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 precursor solution from bismuth nitrate, holmium nitrate, nitric acid AE, ferric nitrate and manganese acetate, wherein AE is Ca, Ba or Sr, and x=0.01-0.08; spinning the precursor solution on a substrate; and then spinning, drying and annealing, so as to obtain the Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film. The Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film is simple in demands on equipment; the experiment condition is easy to achieve; the doping amount is easy to control; the ferroelectric property of the film can be greatly improved; and the prepared Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film is good in uniformity, low in leakage current and low in coercive field, and has relatively high remanent polarization.
![Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film and preparation method thereof](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/d995d881-416d-434e-a495-429efc7a0c24/HDA0000631249920000011.PNG "Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film and preparation method thereof")
![Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film and preparation method thereof](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/d995d881-416d-434e-a495-429efc7a0c24/HDA0000631249920000012.PNG "Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film and preparation method thereof")
![Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film and preparation method thereof](https://images-eureka-patsnap-com.libproxy1.nus.edu.sg/patent_img/d995d881-416d-434e-a495-429efc7a0c24/HDA0000631249920000021.PNG "Bi[0.92-x]Ho0.08AExFe0.97Mn0.03O3 multiferroic film and preparation method thereof")
Owner:SHAANXI UNIV OF SCI & TECH
Water-adhesive composite waterproof pulp and preparation method thereof
The invention discloses a water-adhesive composite waterproof pulp. The water-adhesive composite waterproof pulp is prepared from the following components in part by weight: 30-60 parts of water, 10-30 parts of a fire extinguishing agent, 10-30 parts of a fire retardant, 3-8 parts of a thickening agent, 3-8 parts of a water-base adhesive. The problems that the fire source is afterburning, the costis high and the soil pollution is easily caused due to short fire preventing and extinguishing time is short in period in the prior art are solved. The fast fire extinguishing and afterburning prevention are realized through plugging and oxygen isolation; and the fireproof pulp is low in cost, high in security, environment-friendly and pollution-free. The invention further discloses a preparationmethod of the water-adhesive composite waterproof pulp, the process flow and the equipment requirement are simple, the experimental condition is easy to achieve, the operability is strong, the production period is short, the reproducibility is high and the preparation method can be used for industrial production.
Owner:甘灿新
Preparation method and application of self-healing-gel-coated hollow stannic oxide nano microsphere material
ActiveCN106207110AImprove cycle performanceCoated evenlyHybrid capacitor electrodesCell electrodesSelf-healingMicrosphere
The invention provides a preparation method and an application of a self-healing-gel-coated hollow stannic oxide nano microsphere material. The preparation method comprises the steps of adding poly allyamine hydrochloride and phytic acid into a hollow SnO<2> suspension liquid at the mass ratio of 10 to 3-9, adjusting the pH value to be neutral, and performing stirring, standing, low-temperature freezing, and carrying out freeze-drying by a freeze dryer to obtain phytic acid-crosslinked poly allyamine hydrochloride gel-coated hollow SnO<2> nano microsphere. By adoption of the method, the severe volume expansion problem of the stannic oxide negative electrode material in a charging-discharging process of the conventional lithium ion battery is effectively relieved, thereby improving cycling stability; and after the nano microsphere material is subjected to cycles of 100 times, the capacity of the nano microsphere material still can be stabilized at 459mAh.g<-1>. The self-healing-gel-coated hollow SnO<2> nano microsphere material has wide application prospect in prolonging the cycle life of the negative electrode material of the lithium ion battery, also can be applied to a supercapacitor and other energy storage equipment at the same time, and can be expected to be applied to a sensor or electronic skin.
Owner:北京传奇优声文化传媒有限公司
Porous lamellar-structured bismuth tungstate film as well as preparation method and application thereof
ActiveCN106865617AImprove uniformityUniform sizeWater/sewage treatment by irradiationWater treatment compoundsLayer wiseBismuth preparation
The invention discloses a porous lamellar-structured bismuth tungstate film as well as a preparation method and application thereof. The preparation method comprises the following steps: respectively dissolving Na2WO4 and Bi(NO3)3 into glycol so as to prepare a solution A with a certain concentration and a solution B with a certain concentration, dropwise adding the solution A into the solution B so as to obtain a precursor solution, and ageing the precursor solution, so as to obtain colorless and clarified sol; and preparing a Bi2WO6 film with a uniform, narrow and long duct net structure on an FTO glass substrate by virtue of a spin-coating method and a layer-by-layer annealing process. According to the preparation method, a sol-gel process is adopted, equipment requirements are simple, experimental conditions are mild, the stability of the prepared soil can be preserved for a long time, the concentration of the sol is accurate and controllable, and the prepared Bi2WO6 film has a light current of 0.84mA / cm<2> in the moment of visible light illumination and has wide application prospects in the photocatalysis field.
Owner:SHAANXI UNIV OF SCI & TECH
Light-driven shape-programmable MXene composite hydrogel driver and preparation method thereof
ActiveCN113045716AControl of temperature-sensitive bending propertiesAvoid Interface DefectsEngineeringBiological organism
The invention discloses a light-driven shape-programmable MXene composite hydrogel driver and a preparation method thereof. The light-driven shape-programmable MXene composite hydrogel driver is formed by copolymerization of a polymerizable MXene nano monomer and thermosensitive PNIPAM hydrogel in-situ free radicals. The distribution of MXene and the anisotropy of a hydrogel network can be controlled by utilizing a low electric field, so that various biologically excited programmable anisotropic hydrogel drivers are developed by controlling an ITO electrode pattern, a direct-current electric field direction and mask-assisted ultraviolet polymerization. The invention provides a new development insight of a programmable and reconfigurable intelligent driver, and the intelligent driver can have application prospects in various fields.
Owner:TIANJIN UNIV
Porous lamellar-structured titanic acid particle and preparation method thereof
ActiveCN106861669AImprove photocatalytic performanceSimple requirementsWater/sewage treatment by irradiationWater treatment compoundsWhite powderAqueous solution
The invention discloses a porous lamellar-structured titanic acid particle and a method thereof, belonging to the technical field of nanomaterials. The preparation method comprises the following steps: (1) adding a lamellar-structured titanic acid particle into a Ba(OH)2 water solution, carrying out hydro-thermal treatment, filtering, washing, and drying, so as to obtain white powder; and (2) soaking the white powder into a diluted hydrochloric acid solution, stirring, filtering, washing, and drying, so as to obtain the porous lamellar-structured titanic acid particle. According to the preparation method, lamellar titanic acid is used as a precursor for synthesizing lamellar titanic acid with a porous structure on the surface by virtue of hydro-thermal treatment and acid treatment according to structural features of the precursor, so that the photocatalytic performance of lamellar titanic acid is effectively improved.
Owner:SHAANXI UNIV OF SCI & TECH
Method for preparing carbon nano tube by sunflower seed skin
InactiveCN102849725BLow costWide variety of sourcesSolid waste disposalCarbon nanotubesCapacitanceHydrogen
Owner:HEILONGJIANG UNIV
Reinforced treatment method of spring steel surface blueing coating
ActiveCN105063600AExcellent corrosion and wear resistanceImprove uneven film formationAnodisationMetallic material coating processesSpring steelWear resistance
The invention relates to a reinforced treatment method of a spring steel surface blueing coating, which comprises the following steps: carrying out deoiling treatment on spring steel, washing with hot water, washing with cold water, and blueing to obtain blued spring steel; and carrying out constant-potential polarization treatment on the blued spring steel, washing with hot water, washing with cold water, saponifying, flushing with water, drying, soaking in hot oil, and controlling oil. The electrochemical method is utilized to carrying out anodic polarization on the blueing coating to reinforce the blueing coating and fill up the film formation clearance, so that the blueing coating has higher corrosion resistance and wear resistance.
Owner:BAOSTEEL GRP NANTONG WIRE PROD
Molybdate base samarium doped red fluorescent powder applicable to white light LED and preparing method thereof
InactiveCN107338051AImprove luminous performanceSolve attenuationLuminescent compositionsAir atmosphereMolybdate
The invention discloses molybdate base samarium doped red fluorescent powder applicable to a white light LED. Molybdate serves as a substrate, the general chemical formula is Li3Sr2Gd(3-x)(MoO4)8: xSm3+, wherein x is bigger than or equal to 0.01 and smaller than or equal to 0.2, the molybdate base samarium doped red fluorescent powder applicable to the white light LED is prepared by doping an active ion Sm3+, the problems are solved that existing commercialized red fluorescent powder is poor in luminescence property and has serious light decay and instability and slaking does not occur easily, and the molybdate base samarium doped red fluorescent powder is stable in chemical property and good in color rendering; the invention further discloses a preparing method of the molybdate base samarium doped red fluorescent powder. The method comprises the steps of mixing and grinding Li2CO3, Sr2CO3, Gd2O3, MoO3 and Sm2O3, performing calcination under air atmosphere, conducting heat preservation, then conducting grinding after furnace cooling, and finally obtaining the molybdate base samarium doped red fluorescent powder applicable to the white light LED. The fluorescent powder is prepared based on solid-phase synthesis, the reproducibility is good, and the preparing period is short.
Owner:SHAANXI UNIV OF SCI & TECH
Method for directly loading photocatalyst and filling by layers and member thereof
ActiveCN109107495ALarge specific surface areaImprove adsorption capacityEnergy based chemical/physical/physico-chemical processesTransmittanceEngineering
The invention relates to a method for directly loading a photocatalyst and filling by layers and a member thereof. The method comprises preparation of a binding agent, ultrasonic washing of a carrier,binding of the carrier and the binding agent, ultrasonic loading of the photocatalyst and layered filling of the photocatalyst. The member comprises a metal net lining, a metal zip fastener and a plurality of layering grids, wherein the metal net lining is closed through the metal zip fastener; the metal zip fastener is connected onto the metal net lining through a metal wire which is slightly thinner than the metal net lining; one point of each layering grid is fixed on the metal net lining and then the layering grid is fixed on the metal net lining through the metal zip fastener. When the photocatalyst is loaded, high-temperature calcination is not needed; the viscosity of the binding agent is prevented from being damaged and a condition that the activity of the photocatalyst is reducedwhen the firing temperature is not proper is also avoided; the problem that the catalyst falls off, caused by subsequent high-temperature calcination, is also avoided; meanwhile, the loaded catalystcan have relatively high activity, relatively high light transmittance and relatively low pressure drop.
Owner:OCEAN UNIV OF CHINA
Molybdate-based europium-doped red phosphor suitable for white light LED, and preparation method thereof
InactiveCN107365582AHigh luminous intensityHigh color purityEnergy efficient lightingLuminescent compositionsAir atmosphereMolybdate
The invention discloses a molybdate-based europium-doped red phosphor suitable for white light LED, wherein molybdate is used as a matrix, the chemical general formula is Li3Sr2Gd3-x(MoO4)8:xEu<3+>, x is more than or equal to 0.02 and is less than or equal to 0.30, the molybdate-based europium-doped red phosphor suitable for white light LED is prepared by doping activated ions Eu<3+>, the red light having characteristics of strong light emitting intensity and high color purity and having a main peak positioned at near 619 nm under the excitation of ultraviolet and blue light, the chemical properties are stable, and the color rendering property is good. The invention further discloses a preparation method of the molybdate-based europium-doped red phosphor, wherein the preparation method comprises: carrying out mixing grinding on Li2CO3, Sr2CO3, Gd2O3, MoO3 and Eu2O3, calcining in an air atmosphere, carrying out thermal insulation, cooling along with the furnace, and grinding to obtain the molybdate-based europium-doped red phosphor suitable for white light LED, and the method has advantages of strong operability, good reproducibility, short preparation period.
Owner:SHAANXI UNIV OF SCI & TECH
LaSrMnCo/GdSrMnCo codoped bismuth ferrite superlattice film and preparation method thereof
The invention provides an LaSrMnCo / GdSrMnCo codoped bismuth ferrite superlattice film and a preparation method thereof. A Bi0.85La0.12Sr0.03Fe0.94Mn0.04Co0.02O3 / Bi0.85Gd0.12Sr0.03Fe0.94Mn0.04Co0.02O3 superlattice film, namely the LaSrMnCo / GdSrMnCo codoped bismuth ferrite superlattice film, is prepared from bismuth ferrite films doped according to different elements, wherein the crystal structures of the bismuth ferrite films are trigonal structures and the space groups thereof are in a coexistent state of R3c: H and R3m: R. In the preparation method, a sol-gel process is adopted, and a spin coating and layer-by-layer annealing method is adopted; equipment requirements are low; the preparation method is suitable for preparing films on large surfaces and irregularly-shaped surfaces; chemical components are precise and controllable; nd the multi-ferrous performance of BiFeO3 films can be improved.
Owner:SHAANXI UNIV OF SCI & TECH
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