11 results about "Bismuth trioxide" patented technology

The application provides a method for preparing bismuth trioxide-cuprous oxide nanocomposite based on a synergistic reaction, which comprises the following steps: dispersing sodium bismuthate, sodium sulfite and cuprous chloride in deionized water to obtain a solid-liquid mixture; and placing the solid-liquid mixture under a hydrothermal condition, so as to in-situ prepare the Bi2O3-Cu2O nanocomposite through the synergistic effect of the redox reaction between sodium bismuthate and sodium sulfite in the system and the anion exchange reaction between cuprous chloride and hydroxyl ions generated in-situ. The application is based on the synergistic effect of the redox reaction and the anion exchange reaction under the same hydrothermal condition, and high-purity Bi2O3-Cu2O nanocomposite can be prepared in-situ in one step without adding an alkali source and a template agent. The prepared composite can effectively form a p-n heterojunction, significantly inhibit the recombination of photo-generated carriers, improve the photocatalytic activity and redox capacity of the material, and the preparation process is simple, green and economical, and easy for industrialized production.

This invention discloses a positive electrode paste for lead-acid batteries, its preparation method, and its application, belonging to the field of battery technology. The raw materials for the positive electrode paste include the following components: lead powder, sulfuric acid solution, deionized water, synthetic fiber, bismuth trioxide, conductive agent, polytetrafluoroethylene dispersion (based on solid content), and other additives. The lead powder is mainly composed of a mixture of elemental lead and lead oxide. The concentration of the sulfuric acid solution is 1.3~1.4 g / mL. The conductive agent is selected from conductive carbon black and conductive graphite. Through the combined effect of the above components and their contents, this invention enables the positive electrode paste for lead-acid batteries to possess high-rate discharge performance, high structural stability, and long cycle life. Lead-acid batteries prepared using this paste maintain high energy density while also exhibiting excellent electrical performance and cycle stability, solving the problems of low power density and poor cycle performance in traditional lead-acid batteries.

The application discloses a copper electrode zinc oxide varistor and a preparation method and application thereof, and relates to the technical field of varistor materials.The varistor disc preparation material is composed of zinc oxide, bismuth trioxide, nickel oxide, tricobalt tetroxide, manganese dioxide, boric acid, aluminum nitrate nonahydrate, antimony trioxide, yttrium oxide and chromium oxide, is subjected to ball milling mixing, granulation, compression molding, glue removal, sintering to obtain ceramic black sheets, and is subjected to copper electrode printing and burning and permeation in a nitrogen atmosphere to obtain a copper electrode varistor.The application effectively reduces the raw material cost under the premise of ensuring the quality of the grain boundary by replacing Sb2O3 with Y2O3, and simultaneously, the Cr 3+ The segregation at the grain boundary and the second phase precipitation form a grain boundary pinning effect, abnormal growth of ZnO grains is inhibited, and the grain size distribution is more concentrated.The application improves the nonlinear coefficient of the copper electrode varistor, reduces the leakage current and the residual voltage ratio, and the comprehensive electrical performance is excellent.

The application belongs to the technical field of electronic materials, and specifically discloses a high-dispersion aluminum-doped zinc oxide voltage-dependent resistor material and a preparation method thereof. The high-dispersion aluminum-doped zinc oxide voltage-dependent resistor material comprises the following raw materials in parts by weight: pretreated zinc oxide 90-92 parts, bismuth trioxide 2-3 parts, cobalt oxide 0.7-0.9 parts, aluminum trioxide 1.5-1.8 parts, silicon dioxide 1.2-1.5 parts, manganese oxide 0.6-0.8 parts, tin oxide 0.07-0.09 parts, and nickel trioxide 0.2-0.5 parts. The pretreated zinc oxide reduces the agglomeration of zinc oxide, and the subsequent cooperation with other components improves the performance stability of the voltage-dependent resistor, reduces the leakage current, and prolongs the service life.

The application discloses a conductive silver paste for photovoltaic cells and a preparation method thereof. The conductive silver paste comprises the following raw materials in percentage: 65-85% of silver powder and 1-3% of modified binder, and the rest is an organic carrier. In the printing process of the conductive silver paste, the substances in the organic carrier contact the silver powder, so that the silver chelate in the organic carrier is fully contacted, and then a stable conductive path can be formed during baking. The modified binder is a lead-free glass formed by taking bismuth trioxide as a main raw material to form a bismuth-based glass. The addition of calcium fluoride in the raw material can reduce the water absorption of the bismuth-based glass, thereby ensuring the stability of the resistivity. The addition of titanium dioxide can exist in a quadruple coordination form, so that the Si-O-Si bond in the glass is changed into a Si-O-Ti bond, thereby forming an interconnected tetrahedral structure, increasing the network connectivity of the glass, and simultaneously increasing the antireflection effect of the glass and the utilization rate of light energy.

The application discloses a kind of steel identification traceability with high temperature ink and preparation method thereof, it is related to high temperature ink technical field, to solve the problem that prior art cannot meet the comprehensive application needs of steel high temperature online identification, low light high efficiency identification, by weight parts include: 20-30 parts rare earth glass frit powder, 5-10 parts inorganic pigment, 2-4 parts adhesion agent, 10-20 parts deionized water, 5-12 parts dispersing agent, 20-45 parts humectant, 0.05-0.15 parts defoaming agent, 0.05-0.15 parts PH regulator, 0.03-0.06 parts preservative;The melting temperature of the rare earth glass frit powder is 450-750 DEG C, and it includes by weight parts: 10-30 parts silicon dioxide, 5-10 parts aluminium oxide, 25-35 parts bismuth trioxide, 5-10 parts europium trioxide, 3-5 parts dysprosium trioxide, 5-10 parts boron trioxide, 3-8 parts calcium oxide, 2-4 parts strontium oxide, 1-3 parts magnesium oxide, 3-8 parts sodium oxide, 1-3 parts potassium oxide.The application has the advantages of enhancing the high temperature bonding performance of ink and low light color development and identification.

The application belongs to the field of porcelain dielectric capacitor preparation, and particularly relates to a base metal high-voltage multilayer porcelain dielectric capacitor and a ceramic dielectric material and a preparation method thereof. The ceramic dielectric material comprises the following molar parts of raw materials: 100 parts of a BST main matrix, and 0.5-2.0 parts of NBT material. The BST main matrix comprises the following raw materials: BT material, strontium titanate, magnesium oxide, trimanganese tetroxide, zirconium dioxide, calcium carbonate, rare earth oxide, niobium pentoxide, and silicon dioxide. The NBT material is composed of bismuth trioxide, sodium carbonate, and titanium dioxide in a molar ratio of 2:1:1. The application limits the composition of raw materials and the preparation method of the multilayer porcelain dielectric capacitor, and obtains excellent performances such as a dielectric constant (>=2000), low loss (<=2%), super-high withstand voltage (BDV >=100 V / um), high insulation resistance (RC@25 DEG C >=2000 M omega mu F, RC@125 DEG C >=200 M omega mu F), good temperature stability, and compliance with X7R requirements.

This invention belongs to the technical field of resistive electrical components, and specifically relates to a method for preparing a zinc oxide resistor with high gradient and high current flow stability. The zinc oxide resistor comprises: zinc monoxide, bismuth trioxide, antimony trioxide, nickel trioxide, manganese tetroxide, cobalt tetroxide, tin dioxide, boron trioxide, nano-silver powder, aluminum nitrate nonahydrate, barium acetate, binder, dispersant, and deionized water. The zinc oxide resistor designed in this invention has the advantage of good stability under high gradient and high current flow, overcoming the degradation behavior of existing zinc oxide varistors caused by the influence of high current surge impact on the zinc monoxide grain boundary barrier, and is suitable for industrial application.

The application discloses a preparation method of Mo-doped Bi2O3 and application of the Mo-doped Bi2O3 in photocatalytic nitrogen fixation, and is characterized in that: in the synthesis process of Bi2O3, molybdenum salt is added to obtain brownish yellow Mo-doped Bi2O3 through a solvothermal method. The preparation method is simple, raw materials are cheap and easy to obtain, the environment is less polluted, and the Mo-doped Bi2O3 is harmless to human bodies, has good photocatalytic nitrogen reduction performance, and has a good application prospect in the field of photocatalytic nitrogen fixation.

The application belongs to the technical field of ceramic metal composite materials, and particularly relates to a multiphase ceramic composite plate and a preparation method thereof, and a metal-based ceramic composite lining plate for a ball mill and a preparation method thereof. The composite material comprises, in terms of weight fractions, 70-90 parts of zirconium oxide, 5-10 parts of silicon carbide, 5-10 parts of aluminum oxide, 2-6 parts of titanium dioxide, 2-5 parts of tungsten carbide, 2-4 parts of scandium oxide, 2-4 parts of cobalt oxide, 1-3 parts of potassium tantalate, 1-3 parts of potassium titanate, 1-2 parts of bismuth trioxide, and 1-2 parts of erbium oxide. The dense ceramic plate is obtained through mixing, wet grinding, drying, pressing and high-temperature sintering, and is further broken and screened to form a special-shaped ceramic sheet. The special-shaped sheet is laid in a mold and filled with high-chromium cast iron powder, and is subjected to vibration and high-temperature sintering to form a stable integrated metal-based ceramic composite lining plate. The prepared lining plate has high hardness of ceramic and toughness of metal, and is suitable for high-wear equipment such as a ball mill.