137 results about "Bismuthate" patented technology

Opiates, amphetamines, barbiturates and other drugs such as benzodiazepines are extensively abused or misused and are frequently the cause of death by overdosing. These drugs are also prone to oxidation and the final degradation products depend on the reactants and the reaction conditions. This invention describes the use of inactivating agents such as permanganates, peroxides, persulfates, bismuthates, periodates or other oxidants in a dosage form as an approach to minimize abuse and overdose. The product is designed such that the inactivating agent is released if there is an attempt to extract the drug from the formulation or in cases of overdose. Once released, the inactivating agent quickly degrades the drug and converts it into inactive compounds. Since the reactants (drug and inactivating agent) are incompatible in situations of normal drug usage, they are kept separated within the vehicle of the invention, but released for interaction in case of misuse. A catalyst may be included in the formulation to facilitate the reaction.

The invention relates to a preparation method and an application of a metal element doped BiOCl nanosheet material. The method comprises the steps of taking bismuthate, a doped source, a reducer, a chlorine source and an accessory ingredient as raw materials, synchronously applying a mechanical force of a high energy ball mill onto an oxidoreduction reaction, a doping reaction and a chlorination reaction, and performing heat treatment, washing, purification, solid-liquid separation and drying to form the metal element doped BiOCl nanosheet material. A mole ratio of a doped metal element to a bismuth element in the prepared material is (0.01-0.3):1; the material comprises a nanosheet that is 20-500 nm in planar size and 1-20 nm in thickness; the specific surface area of the material is 3-300 m<2>/g. The method is simple in technology, high in industrial production possibility, low in manufacturing technology cost and environmentally friendly; the prepared metal element doped BiOCl nanosheet material is widely applied to the fields of supercapacitors, alkaline secondary batteries, lithium ion batteries, photocatalysts, pearlescent pigments, medicines and the like.

The present invention discloses a bismuthate low-melting point and lead-free sealing grass and a preparation method thereof. The bismuthate low-melting point and lead-free sealing grass powder comprises, by mass, 75-90% of base glass and 10-25% of a filler, wherein the filler is a zirconium phosphate salt with an expansion coefficient of -5*10<-6>k<-1>-5*10<-6>k<-1>. The bismuthate low-melting point and lead-free sealing grass of the present invention has characteristics of lead-free property and green environmental protection, can replace the lead-containing glass so as to eliminate the pollution due to the lead, and has excellent chemical stability. The production process is simple and the cost is low. Compared to other filler-doped sealing glass powders, the sealing temperature of the present invention is low, the glass transition temperature of the present invention is 330-370 DEG C, the softening temperature of the present invention is 370-410 DEG C, the sealing temperature of the present invention is less than 450 DEG C. With adjusting the proportion of the filler, the adjustable expansion coefficient can be realized at the low sealing temperature, wherein the adjustment range is (70-90)*10<-7>/DEG C, such that different requirements of the sealing device to the expansion coefficient of the sealing material can be met, and the sealing for VFD, PDP, CRT and other glass products can be directly performed.

The invention relates to an alumina ceramic low temperature brazing connection method and aims at solving the problems that existing brazing alumina ceramics are high in soldering temperature and low in connection strength of obtained joints. The brazing connection method comprises the following steps: 1, mixing Bi2O3, B2O3, ZnO and SiO2, and obtaining low-melting-point bismuthate glass powder; 2, conducting mechanical grinding on an alumina ceramic, conducting ultrasonic cleaning, and obtaining a pre-treated alumina ceramic; 3, preparing an alumina ceramic where aluminum borate whiskers grow; 4, applying glass soldering paste to the surface of the alumina ceramic where the aluminum borate whiskers grow; 5, making two alumina ceramic parts to be soldered be in contact and aligned with each other; 6, conducting brazing connection at the temperature of 480-650 DEG C. By means of the alumina ceramic low temperature brazing connection method, connection of the alumina ceramic is achieved at the low temperature, the thermal expansion coefficient of the adopted glass brazing material is matched with the alumina ceramic, the shearing strength of an obtained soldered joint can reach 60-100 MPa, and reliability of alumina connection is guaranteed.

The invention discloses a visible-light response bismuthate photocatalyst Sr2Bi3V3O14 and a preparation method thereof. The chemical composition formula of the bismuthate photocatalyst is Sr2Bi3V3O14. The invention further discloses the preparation method of the photocatalyst. According to the photocatalyst and the preparation method of the photocatalyst, the preparation method is simple and is low in cost, and the prepared photocatalyst has excellent catalysis performance, plays a role in decomposing harmful chemical substances under the irradiation of visible light and is good in stability, thereby having good application prospects.

The title of the invention is an optical glass melting method and an optical glass melting device used for the method. The invention belongs to the technical field of optical glass melting and mainly provides a method for melting glass and a device for controlling high quality of flowed molten glass. The melting method is mainly characterized in that: (1) putting optical glass raw materials of phosphatic, columbate and bismuthate into a crucible for high-temperature fusion, clarification and homogenization so as to obtain molten glass; (2) placing the above crucible together with the molten glass into an insulation area of a smelting furnace; and (3) leading out the molten glass at an intermediate area below the central surface layer and over the bottom of the crucible from the smelting furnace through a conduit so as to prepare an optical glass strip material. The furnace bottom is a liftable furnace bottom, and a guiding control device is a flow guide tube made of platinum or platinum alloy. The optical glass manufactured in the invention has high transmittance, and its refractive index nd is not less than 1.8. The optical glass has characteristics of no pollution of metal Pt and Au particles and no generation of streaks in the strip material, and is mainly used to manufacture phosphatic, columbate and bismuthate optical glass strip materials.

The invention discloses a preparation method of a lanthanum bismuthate nanorod, and belongs to the technical field of nanometer material preparation. The method is concretely characterized in that firstly, sodium bismuthate and lanthanum acetate are uniformly mixed; then, sodium bismuthate and lanthanum acetate mixed powder is put into a high-temperature region of an alundum tube reaction container; an alumina wafer is put into a low-temperature region of the alundum tube reaction container; the reaction container is sealed; the high-temperature region is heated to be 1100 to 1300 DEG C; the low-temperature region is heated to be 100 to 200 DEG C; heat insulation is performed for 0.5 to 3h; the alumina wafer containing white sediments on the surface is obtained; then, the alumina wafer isfixed in the middle of the reaction container; the sodium bismuthate, the lanthanum acetate and water are mixed and are then put into the reaction container to be sealed; heat insulation is performedfor 24 to 72h at the temperature of 300 to 500 DEG C. The two-step reaction process is used; the preparation process is simple; the control is easy; the obtained lanthanum bismuthate nanorod has goodapplication prospects in the aspects of photocatalysis, adsorption, lithium ion batteries, solid-oxide fuel batteries and the like.

The invention relates to a colloid tartro-bismuthate and a drug preparation, a preparation method and application of the colloid tartro-bismuthate. The colloid tartro-bismuthate consists of tartaric acid, trivalent metal bismuth ion oxide or salt and low methoxyl-D-polygalacturonase; and the colloid tartro-bismuthate is subjected to centrifugal spraying and drying by dissolution, mixing, precipitation and other methods to form microcrystalline fine powdery colloid tartro-bismuthate. The drug has obvious treatment effect on chronic nonspecific ulcerative colitis, irritable bowel syndrome and chronic colonic inflammation, has good treatment effect on chronic atrophic gastritis and other stomach diseases, has small toxicity and side effect and belongs to a safe, nontoxic and effective drug of a gastroenterology department.

The invention relates to connection of glass and metal, in particular to a low-temperature connecting method for K9 glass and titanium metal. The low-temperature connecting method is characterized by comprising the following steps: (I) preparing powdered composite solder of bismuthate containing an active element Ti; (II) placing the composite solder between the titanium metal and the K9 glass; (III), getting out a sample and then putting the sample into a vacuum connecting furnace, wherein direct-current electric fields with voltage of 100 to 700V are arranged in the vacuum connecting furnace, the temperature of the vacuum connecting furnace is 300 to 600 DEG C, pressure of 5 to 40Pa perpendicular to the sample plane is applied, and the degree of vacuum is 10<-3> to 10<-2> Pa; and keeping the temperature not more than 120 minutes to realize an effective connection of the K9 glass and the titanium metal, cooling the sample to the room temperature along with the furnace, then, getting out the sample, thereby completing low-temperature connection of the K9 glass and the titanium metal. The low-temperature connecting method has the advantages of being simple to operate, green and environmentally-friendly, high in working efficiency, stable in process, and the like.

The invention discloses a preparation method of polyaniline compounded zinc bismuthate nano-rods, and belongs to the technical field of preparation of functional materials. According to the preparation method, sodium bismuthate, zinc acetate and polyaniline are used as raw materials, and argon is used as carrier gas. The preparation method comprises the following specific steps: uniformly mixing the sodium bismuthate with the zinc acetate at first; and then placing mixed powder of the sodium bismuthate and the zinc acetate in a high-temperature region of an alundum tube reaction container, placing the polyaniline in a low-temperature region of the alundum tube reaction container, sealing the reaction container, heating the high-temperature region to the temperature of 1,200-1,400 DEG C, heating the low-temperature region to the temperature of 200-300 DEG C, and insulating for 12-24 hours, wherein the flow speed of the argon is 100-200 cm<3>/min. A preparation process is simple and is easy to control, and the polyaniline compounded zinc bismuthate nano-rods have good application prospect in the fields of electronic devices, optical devices, electrochemical devices, lithium ion batteries and the like.

The invention relates to a lithium bismuthate/nickel hydroxide secondary alkaline battery and a preparation method thereof. The preparation method utilizes a lithium bismuthate material as a negative electrode active material of the battery, a nickel hydroxide material as a positive electrode active material of the battery and an alkaline solution as an electrolyte solution. The battery has a voltage window of 0.2 to 1.4V. A preparation method of the lithium bismuthate material comprises preparing a mixed solution from a lithium raw material and NaBiO3 according to a certain molar ratio, and carrying out a reflux reaction process at 90 to 110 DEG C for 2 to 72 hours, or carrying out hydrothermal treatment on the mixed solution in a reactor at 120 to 200 DEG C for 2 to 96 hours. The prepared battery has a capacitance of 166 mAh/g at current density of 0.5 A/g and a capacitance of 143 mAh/g at current density of 5 A/g, has characteristics of large capacitance, good cycle stability and environmental friendliness, and is a novel electrochemical power source with a wide application prospect.

The invention relates to a BiOCl material preparation method and application of a BiOCl material. The BiOCl material preparation method comprises the following steps of by taking bismuthate, a reducing agent, a chlorine source and a dispersant as raw materials, synchronously applying the mechanical force of high energy ball milling on redox reaction and chlorination reaction, and then performing heat treatment, washing for impurity removal, solid-liquid separation and drying to prepare the BiOCl material. The prepared BiOCl material is formed by a nanosheet with a plan view size being 0.1-5 microns and the thickness being 2-20nm and has the specific surface area of 3-300m<2>/g. The BiOCl material preparation method has the advantages of simpleness in technology, easiness in industrial production, low cost in manufacturing technology, environmental protection and the like; and the prepared BiOCl material has a wide application in the fields of supercapacitors, alkaline rechargeable batteries, lithium ion batteries, photocatalysts, pearlescent pigments, medicines and the like.

The invention discloses a CaBi2O4/BiOCl heterojunction composite photocatalyst and a preparation method thereof, and belongs to the technical field of photocatalytic materials. The preparation methodcomprises the following steps: dissolving calcium nitrate tetrahydrate in deionized water, dissolving barium nitrate pentahydrate in dilute nitric acid, and uniformly mixing the calcium nitrate tetrahydrate and barium nitrate pentahydrate; dropwise adding dilute ammonia water and the mixed solution into deionized water at the same time, and continuously stirring until the pH value is 6-8 to obtainwhite turbid liquid; stirring and aging the obtained precipitate suspension for 30 minutes, carrying out solid-liquid separation by using a centrifugal machine to obtain a white precipitate, washing,diluting, putting into a reaction kettle, carrying out heating treatment at 180-260 DEG C for 6 hours, and cooling and drying to obtain calcium bismuthate; roasting Calcium bismuthate for 4 h, and then adding absolute ethyl alcohol and deionized water for ultrasonic treatment; and adding hydrochloric acid with required volume according to different molar fractions, stirring, filtering, washing and drying to obtain a series of CaBi2O4/BiOCl heterojunction photocatalysts with different BiOCl contents. The method has the characteristics that the preparation temperature is low, the process is simple, the absorption of the prepared CaBi2O4/BiOCl heterojunction photocatalyst to visible light is enhanced, and the degradation performance to rhodamine B is also obviously superior to that of CaBi2O4.

The invention relates to an ultra-wideband random laser scattering material based on amorphous bismuthate, a laser device and preparation and application. The scattering material comprises the chemical compositions in following mole percents: 45-65% of Bi2O3, 20-35% of B2O3, and 0-20% of Ga2O3; the preparation method comprises the following steps: mixing required raw materials, melting at a high temperature, annealing the high-temperature melt near by the glass transition temperature after the compression molding, and then ball-milling a bulk material into powder, wherein the prepared powder can be used for constructing suspension, solid tablet, substrate spinning film and various construction capable of providing random laser resonant optical feedback; and the ultra-wideband random lasercan be observed in the wide spectrum range of 530-870nm by changing the variety of the gain medium and exciting by the laser in different wavelengths. The preparation method is simple and flexible inform, and can be well used for the optical communication, the digital storage, the energy conversion and other fields.

The invention discloses a copper bismuthate film embedded with ligand-free quantum dots, and a preparation method and an application thereof. The preparation method comprises the following steps: dispersing a semiconductor oxide or a metal material in a liquid medium to obtain a mixed solution; irradiating the mixed solution under a laser beam to obtain a ligand-free quantum dot colloid solution;and mixing the ligand-free quantum dot colloid solution with a copper bismuthate precursor solution, forming a film, and sintering the film to obtain the copper bismuthate film embedded with ligand-free quantum dots. The ligand-free quantum dots are uniformly embedded in the copper bismuthate film by a liquid phase pulse irradiation technique, so that the carrier separation efficiency of the copper bismuthate film is significantly improved; and results of photocurrent density test of films shows that the photocurrent density of the copper bismuthate film not embedded with ligand-free quantum dots is 2.0 mA/cm<2>, and the photocurrent density of the copper bismuthate film embedded with ligand-free quantum dots is increased to about 3.0 mA/cm<2>, so the photoelectric performances are remarkably improved.

The invention belongs to semiconductor blue light chip optical excitation and white light transmission, and discloses boron bismuthate glass based Ce:YAG glass ceramic for white light LED and a preparation method thereof. The glass ceramic is prepared from matrix red light glass sheet and printing slurry through silk-screen printing and sintering, wherein the printing slurry is prepared from low-melting-point fine glass powder, organic mixture and YAG:Ce <3+> fluorescent powder; the matrix red light glass sheet has a chemical general formula of x1B2O3.x2Bi2O3.x3Mo.x4Eu2O3; the low-melting-point fine glass powder has a chemical general formula of x5B2O3.x6Bi2O3.x7Al2O3.x8M'O; and the organic mixture contains terpilenol C10H18O and ethyecellulose C23H24N6O4. The glass ceramic has good thermal stability, good chemical stability, excellent color rendering and luminescence property; and the preparation method has low cost, and can be produced in batches.

The invention discloses a Pr<3+> ion activated near-infrared luminescent material and a preparation method thereof. The matrix of the luminescent material is rare earth bismuthate oxide, Bi<3+> ions enhance the polarization performance of crystal lattices, and positive ions in the crystal lattices have very high occupied disorder, so that a structural basis is provided for effective luminescence of Pr<3+> ions; the luminescent material has the strongest emission intensity in the wavelength range of 1.4-1.56 mum, belongs to 1D2-to-1G4 transition luminescence from Pr<3+> ions, and the emission waveband is mainly suitable for being applied to an E-band extension waveband and an S-band short wavelength waveband in an optical amplifier; the matrix crystal lattice of the luminescent material hasvery strong rigidity, so that the prepared near-infrared luminescent material has very high stability; the preparation method of the near-infrared luminescent material is simple in overall preparation process, easy to operate, low in production cost, free of environmental pollution and high in implementation feasibility.

The invention relates to lead-free bismuthate system low-melting-point glass powder and a preparation method thereof. The glass powder comprises components including a glass main body and an additive;the mass ratio of the glass main body to the additive is 100:(0-17). The preparation method comprises the steps of weighing each component, and conducting stirring and grinding to obtain a mixture; melting the mixture to obtain a glass liquid, and then performing quenching treatment to obtain glass particles; drying and grinding the glass particles to obtain the glass powder. The glass powder does not contain lead and has a low melting point, glass transition temperature of 330-430 DEG C and a wide sintering temperature range.