100 results about "Strontium acetate" patented technology

The invention discloses a method for preparing a high-temperature superconducting coating conductor La0.7Sr0.3MnO3 buffering layer film, and belongs to the technical field of high-temperature superconducting materials preparation. The film prepared by the method is smooth and compact, and is favorable in texture, and triplex functions of La0.7Sr0.3MnO3 as a conducting buffering layer film, namely isolation, extension and electric current transmission, can be adequately exerted. The method comprises the following steps: dissolving analytically pure lanthanum oxide (La2O3) in acetic acid (the mol ratio of the acetic acid to cations being 10: 1) in a cation ratio of La: Sr: Mn=0.7: 0.3: 1; after the analytically pure lanthanum oxide is completely dissolved, putting the obtained solution in an infrared drying box, and after the solution is baked into a white solid, taking out the white solid; mixing and dissolving strontium acetate and manganese acetate with the prepared white solid (namely lanthanum acetate) in propionic acid in the cation ratio of La: Sr: Mn=0.7: 0.3: 1 to form an anhydrous solution; adding polyvinyl butyral (PVB) in the anhydrous solution to prepare into a colloid with good film forming property; and coating the colloid on a substrate, drying the coated substrate, and then, putting the dried substrate in a sintering furnace to be sintered to form a phase, so as to obtain a lanthanum-strontium-manganese oxide La0.7Sr0.3MnO3 high-temperature superconducting coating conductor buffering layer. The cost of the method is low; the manufacturing process is simple; the operation is easy to control; and the environment is not polluted.

The invention belongs to the technical field of electronic ceramics, and specifically relates to a bismuth ferrite-strontium bismuth titanatemultiferroic composite film and a preparation method thereof. The bismuth ferrite-strontium bismuth titanatemultiferroic composite film comprises the following raw materials: ferric nitrate, bismuth nitrate, tetrabutyltitanate and strontium acetate. The bismuth ferrite-strontium bismuth titanatemultiferroic composite film has stable structure, and is substantially reduced in leakage current density and strengthened in ferroelectric performance.

The invention discloses a method for preparing a red strontium sulphide long afterglow material, comprising a hydrothermal coprecipitation method which comprises the following steps that: (a) water-solubility strontium salt, water-solubility europium salt, water-solubility dysprosium salt, carbamide and water are weight according to the mol ratio of 1: between 0.01 and 0.05: between 0.01 and 0.05: between 4 and 6: between 28 and 32 and are put inside a container to be stirred and dissolved, the mixture is insulated in a sealing state at a temperature of between 80 and 160 DEG C for 5 to 24 hours so that a precursor is obtained; (b) the precursor is subject to filtering and annealing at a temperature of between 900 and 1200 DEG C in the reaction environment for 0. 5 to 2 hours so that the red strontium sulphide long afterglow material is prepared; the water-solubility strontium salt is strontium nitrate or strontium chloride or strontium acetate, the water-solubility europium salt is europium nitrate, europium chloride or polyimide, the water-solubility dysprosium salt is dysprosium nitrate or dysprosium chloride or dysprosium acetate, and a surface active agent is added according to the mol ratio of the water-solubility strontium salt to the surface active agent of 1: between 0.0001 and 0.0003. The method is widely applied to the fields such as building decoration, traffic transportation, military facilities, fire emergency service and goods for everyday consumption.

The invention discloses a preparation method of strontium bismuth titanate microwave dielectric tunable membrane with perovskite structure. The Sol-Gel technique is adopted; the pure strontium acetate, the bismuth nitrate and the tetrabutyl titanate are the starting materials; the glacial acetic acid and the glycol ether are the solvent, the acetylacetone is the stabilizing agent, and the strontium bismuth titanate sol with chemical compound of BixSr1-1.5xTiO3 is synthesized. With the rapid thermal process technique, the strontium bismuth titanate membrane is with perovskite structure is produced on the uropatagia. By utilizing the microstructure modification of the strontium bismuth titanate membrane, the dielectric loss of the membrane is decreased while the tunable character of the membrane is not decreased, the quality factor of the membrane is improved, and a practical microwave dielectric tunable membrane of novel type is obtained thereby.

The present invention for ceramics of rare earth doped with strontium cerate nano crystal mainly adopts sol-gel method, to prepare the solution with a certain concentration by using cerous nitrate, strontium nitrate or strontium acetate and rare earth oxide as raw material, the weight ratio of them is dependent on the composition of ceramics to be prepared, the composition of the ceramics is SrCe1-xRExO3, in which the range of x value is 0.02-0.20, the concentraitons of cerous nitrate, strontium nitrate or strontium acetate are 0.2-2 mol/L respectively, using citric acid as complex builder, the added quantity of citric acid is 1.5-2.5 times the said solution, under stirring or ultrasonic vibration, heating in wate bath with 50-80 deg.C, regulating pH value to obtain transparent gel, drying to obtain opaque dried gel.

A method for preparing rare earth doped strontium cerate nanometer crystal thin film by organic polymer presoma method is disclosed. It is prepared by: preparing initial solution with cerous nitrate, strontium nitrate or strontium acetate, rare earth oxide as raw materials, determining the proportion by prepared thin film composition, the composition of thin film is SrCe1-xRExO3, the range of x volume is 0.02-0.20, concentration of initial solution is 0.1-0.4mol/L, taking ethylene as complexant, the adding account of ethylene is 2-6 times of metal ionic total account, mixing and supersonic oscillating, heating in water bath under 50-100deg.C, adjusting PH value, the system being heated reacting to produce organic polymer, film coating with 1500-3000rpm circulating speed on required chip by glue equalizer when viscosity reaching 100-300cP, infrared drying or vacuum drying, second film coating, drying until reaching the required thickness, and producing nanometer crystal thin film under 900deg.C reacting.

A preparation method for niobium-doped strontium titanate thin film comprises the following steps: a)the preparation of niobium-citric acid glycol solution; putting the niobium oxide in hydrofluoric acid to form niobium oxide solution at 70-85 DEG C, then adding ammonia dropwise and aging the solution for 4 to 6 hours; after filtering, taking out the sediment and washing the sediment with dilute ammonia; after drying, the sediment is dissolved into the ethylene glycol solution of the citric acid at 60-80 DEG C. b)the preparation of precursor solution; based on molar ratio, Sr2+: Ti4+: Nb5+ is equal to 1:1-x: x, while x is equal to 0.1- 0.005; measuring and taking strontium acetate, tetrabutyl titanate and the niobium-citric acid glycol solution in the step a; dissolving the strontium acetate into water to get a solution A; adding acetylacetone dropwise into butyl titanate, and then adding ethylene glycol ether solvent to get a solution B; mixing the solution A with the solution B, and then adding the niobium-citric acid glycol solution into the mixed solution, followed by 1-4: 1 of ethylene glycol and glycerol, so that the concentration of the solution can reach Sr2+ ion 0.15-0.40 mol / L. c)thermal decomposition and sintering. The method uses cheap raw materials and has simple production technology and low production costs, which facilitates commercial applications.

The invention discloses a catalyst for degrading antibiotics in water through photocatalysis as well as a preparation method and an application of the catalyst. The preparation method comprises steps as follows: 1), preparation of a nano-powder precursor solution : strontium acetate, antimony pentoxide and 65-75 ml of deionized water are stirred and mixed at the room temperature, the mole ratio of strontium acetate to antimony pentoxide is (1.35-2) :1, the PH is adjusted to 1-5 through 2-6 mol/L of nitric acid, and the nano-powder precursor solution is obtained; (2), preparation of nano-powder under the hydrothermal condition: the nano-powder precursor solution is placed in a 100 ml of high-pressure reaction kettle, is heated to the temperature of 100-200 DEG C at the speed of 1-5 DEG C/min, has a hydrothermal reaction for 6-48 h, is naturally cooled to the room temperature after the reaction ends, and then is taken out, a product is cleaned for 3-5 times with deionized water and absolute ethyl alcohol and put in a drying box to be dried at the temperature of 60-80 DEG C, and a photocatalyst is obtained. The photocatalyst prepared with the preparation method and used for degrading antibiotics in water through photocatalysis can be used for photocatalysis treatment on antibiotics in sewage, and the degradation rate is higher than 89%.

A self-doped strontium titanate ferroelectric film and a preparation method thereof. The self-doped strontium titanate ferroelectric film is composed of a material with a molecular formula of SrTi1+xO3, wherein the value range of x is 0.015-0.02. The preparation method of the film comprises the following steps: weighing strontium acetate, tetrabutyl titanate, and acetylacetone according to a mole ratio of 1:(1.015-1.02):0.7, completely dissolving strontium acetate in acetic acid, then adding ethylene glycol monomethyl ether, tetrabutyl titanate, and acetylacetone, diluting the solution with ethylene glycol monomethyl ether to obtain a mole concentration of strontium acetate of 0.3 mol/L, stirring to obtain a solution C; dropping the solution C on a substrate in a spin coater, performing spin coating, drying and thermolysis till the thickness of the SrTi1+xO3 dry film reaches 300 nm, and performing annealing to obtain the SrTi1+xO3 film. According to the invention, ferroelectricity is induced by excessive Ti and in an anoxic atmosphere, and ferroelectric hysteresis loops are measured at a temperature above zero or even at room temperature; no introduction of other element is necessary, and the method is simple.

The invention discloses an attapulgite/nano-strontium-titanate/nano-tin-oxide photocatalysis silicone-acrylic coating preparation method. Tin tetrachloride, strontium acetate and tetrabutyl titanate serve as raw materials, nano-tin-oxide and nano-strontium-titanate are loaded on the surface of attapulgite by a sol-gel method, the attapulgite is modified by photocatalysis, a prepared attapulgite loaded strontium-titanate/tin-oxide composite nano-material has excellent thickening property, leveling property and photocatalysis activity and then serves as a thickening agent and a photocatalyst for preparing a silicone-acrylic coating, and the prepared silicone-acrylic coating has excellent photocatalysis property, good weather resistance, water resistance, chemical resistance, stain resistance, flexibility and adhesiveness.

The invention discloses a preparation method of a rare-earth modified attapulgite composite nanomaterial loaded with strontium titanate/stannic oxide/zinc sulfide. The preparation method comprises the following steps: adopting tin tetrachloride, strontium acetate and tetrabutyl titanate as raw materials, adding lanthanum chloride and europium sulfate as a rare-earth modifier, correspondingly obtaining rare-earth lanthanum modified gel A and rare-earth europium modified gel B by adopting a sol-gel method, then adopting zinc acetate, thioacetamide and yttrium nitrate as raw materials, adopting a hydro-thermal synthesis method to prepare yttrium-doped nanometer zinc sulfide, then mixing the gel A, the gel B, the purified attapulgite and the yttrium-doped nanometer zinc sulfide, drying, and calcining to obtain three rare-earth elements of lanthanum, europium and yttrium modified attapulgite composite nanomaterial loaded with strontium titanate/stannic oxide/zinc sulfide. The spectral response range of the attapulgite composite nanomaterial loaded with strontium titanate/stannic oxide/zinc sulfide is broadened, and the excellent photocatalytic performance is shown under the visible light and sunlight.

The invention relates to an MOD method for preparing an LSCO conductive film on biaxial texture NiW alloy, which belongs to the technical field of superconducting materials. The method comprises the following steps: dissolving strontium acetate, lanthanum acetate and cobaltous acetate into propionic acid step by step and adding acetylacetone to prepare precursor solution; coating the precursor solution on a biaxial texture NiW base band by a glue homogenizing machine; then carrying out pyrolysis processing and carrying out coating and pyrolysis processing again; and carrying out crystallization reaction. The prepared LSCO film has the thickness of 500-700nm, obstructs the diffusion process of a Ni element to a YBCO layer and favorably prevents the oxidation of an NiW substrate; and the electrical resistivity of the film, which is detected by a four-lead method can reach 1.1*10<-4>omega*m in a liquid nitrogen temperature zone. Compared with the traditional process, the invention reducesthe number of buffer layers, thereby reducing the preparation process and the manufacture cost of a YBCO/buffer/NiW composite material.

The invention provides a method for preparing a strontium bismuth tantalum nanowire, relating to a nanowire preparation method. The method solves the problem that the strontium bismuth tantalum nanowire can not be prepared by the prior art. The preparation method comprises the following steps that: 1. strontium acetate, bismuth subnitrate and tantalum ethoxide are weighed to prepare an SBT precursor sol; 2. the electrophoretic deposition is performed; 3. the calcination process is performed; and 4. the nanowire with a template is put in a sodium hydrate solution so that the strontium bismuth tantalum nanowire is prepared. The method realizes the synthesis of the strontium bismuth tantalum nanowire by adopting the method of electrophoretic deposition through the SBT sol. The method is simple, has simple devices and can accurately control the length of the nanowire.

The invention discloses a preparation method of attapulgite-loaded nano-sized strontium titanate. The preparation method comprises the following steps: weighing strontium acetate and tetrabutyl titanate according to a molar ratio of 1: 1, then dissolving strontium acetate into distilled water to obtain a solution A, and dissolving tetrabutyl titanate into isopropanol to obtain a solution B; while magnetically stirring, dropwise adding the solution A into the solution B, continuing stirring for 2-4 min, standing and aging, then adding purified attapulgite, stirring for 10-15 min, filtering, placing for 1-2 days, drying till a constant weight, presintering for 1-3 h at 200-250 DEG C, increasing the temperature to 380-420 DEG C, keeping the constant temperature for 2-4 h, then increasing the temperature to 590-630 DEG C, keeping the constant temperature for 1-2 h, then increasing the temperature to 770-810 DEG C, keeping the constant temperature for 0.5-1 h, naturally cooling, and taking out on the next day. Attapulgite-loaded nano-sized strontium titanate can efficiently and rapidly adsorb and decompose formaldehyde, benzene, ammonia, TVOC and other harmful gases so as to achieve purifying, disinfecting, deodorizing and sterilizing purposes.

The invention discloses high-brightness nano strontium-aluminate long-afterglow luminous material and a preparation method and application thereof; the preparation method comprises the following steps: mixing strontium acetate semihydrate, aluminum acetate basic, europium acetate, dysprosium acetate and urea according to a mol ratio (0.005-0.02): (0.01-0.04): (0.0004-0.0008): (0.0008-0.0012): (0.02-0.08) and preparing the high-brightness nano strontium-aluminate long-afterglow luminous material through an alcohol-heat synthesis-burning method. Compared with a traditional high-temperature solid-phase method, pure-phase SrA12O4:Eu<2+>,Dy<3+> can be obtained at 1150 degrees centigrade by the preparation method provided by the invention; a burning temperature is reduced greatly; energy source is saved; prepared strontium-aluminate long-afterglow luminous material has good luminous strength and relatively long afterglow time; the preparation method provided by the invention is characterized by safe and nontoxic use, simple and easy operation, low cost, high efficiency and easy industrial application.

The invention discloses a barium strontium titanate multilayered film, and a preparation method thereof. According to the invention, barium acetate, strontium acetate and tetrabutyl titanate with certain molar ratios are dissolved into an acetic acid solution, an ethylene glycol methyl ether solution and an acetylacetone solution, such that stable precursory sols with different barium-strontium ratios are prepared. Sol distribution processes and heat treatment processes are alternatively carried out upon substrates such as silicon-based platinum, until a required thickness is reached. According to the invention, the barium strontium titanate multilayered structure is prepared with a chemical solution deposition method. With the method, a film material with high tuning rate and low dielectric loss can be obtained. The film can be used in microwave tuning devices.

The invention relates to B-site vacancy Fe-doped strontium titanate and a preparation method thereof, and belongs to the technical field of functional materials. The molecular formula of the B-site vacancy Fe doped strontium titanate is Sr (Ti0. 6Fe0. 4) < 1-x > O < 3-delta >, wherein the B-site vacancy amount is x, A/B is greater than 1, A is the molar weight of Sr, and B is the total molar weight of Ti and Fe. The preparation method comprises the following steps: synthesizing precursor powder by adopting a sol-gel method: dissolving strontium acetate, ferric oxide and tetrabutyl titanate which serve as raw materials into isopropanol and absolute ethyl alcohol according to a molecular formula molar ratio, and sufficiently stirring on a magnetic stirrer for 40 minutes to form sol; standingfor 12 hours, and layering to form wet gel; putting into a drying box, drying at 60 DEG C to form fluffy dry gel, and grinding to obtain precursor powder; and calcining the obtained precursor powderat 1100 DEG C for 10 hours to obtain the B-site vacancy Fe-doped strontium titanate powder. The purpose of the method is to improve the conductivity and catalytic activity of the material by doping pure SrTiO3.

The invention discloses a hole sealing agent for hole sealing of a CTP plate. The hole sealing agent is composed of, by mass, 5%-15% of main agents, 0.2%-3% of assistants and the balance water, wherein the main agents are one or more of sodium acetate, nickel acetate, cobalt acetate and strontium acetate, and the assistants are one or more of citric acid, phosphoric acid, sodium fluoride and sodium dihydrogen phosphate. The hole sealing agent is moderate in price and convenient to operate and control, and the performance of screen dot reduction, hydrophilicity, pressrun and the like of the CTPplate subjected to hole sealing treatment through the hole sealing agent is excellent. The invention further provides a using method of the hole sealing agent for hole sealing of the CTP plate. The hole sealing agent prepared from the raw materials is sprayed on an anodized aluminum plate for 5-25 s at the temperature of 35-55 DEG C, then the aluminum plate is cleaned through deionized water, andthus hole sealing treatment of the aluminum plate is completed. Operation is easy, and a shutdown staining failure widely occurring in existing CTP plates can be effectively solved.

The invention relates to a sodium bismuth titanate-based lead-free piezoelectric film and a preparation method thereof, and belongs to the field of electronic functional materials and devices. The preparation method provided by the invention comprises the following steps: step 1, adding bismuth nitrate, sodium acetate and strontium acetate into a solvent, and stirring to obtain a solution A; step 2, dissolving acetylacetone, tetrabutyl titanate, ferric nitrate nonahydrate and manganese acetate tetrahydrate in a solvent, stirring and heating to obtain a solution B; step 3, mixing the solution A with the solution B, and performing pretreatment to obtain a mixed solution C; and step 4, coating a treated substrate with the mixed solution C by using a spin coating method, and performing high-temperature treatment to obtain the (0.72-x)(Bi0. 5Na0. 5) TiO3-0. 28SrTiO3-xBi (Fe0. 95Mn0.03Ti0.02)O3 ternary system sodium bismuth titanate-based lead-free piezoelectric film. Therefore, the piezoelectric film prepared by the method is flat and smooth in surface, has a typical perovskite structure, relatively high polarization intensity and excellent piezoelectric performance; and meanwhile, the inverse piezoelectric coefficient can reach 179.7 picometer/volt to the maximum, and the method has very important significance for developing a high-performance lead-free piezoelectric film.