59 results about "Bismuth trioxide" patented technology

The invention discloses a NiCu-based alloy catalyst for preparing high-value products through natural gas decarbonization and application of the NiCu-based alloy catalyst, and belongs to the technical field of natural gas high-value catalytic conversion. The preparation method of the NiCu-based alloy catalyst comprises the following steps: (1) adding nickel nitrate hexahydrate and urea into hot water, adding ethylene glycol, carrying out a stirring reaction at 120-150 DEG C, and calcining the obtained intermediate to obtain a nickel oxide precursor; (2) adding a copper nitrate aqueous solution and ammonia water into the nickel oxide precursor, so that copper ions are anchored on the surface of nickel oxide, drying and calcining to obtain a Ni-Cu alloy oxide precursor; and (3) adding the Ni-Cu alloy oxide precursor, bismuth trioxide and metallic tin into deionized water, adding a complexing agent, carrying out ultrasonic treatment, and carrying out H2 reduction calcination on the obtained precipitate to obtain the Ni < x > Cu < y > Bi < z > Snm alloy. The NiCu-based alloy catalyst is used in a natural gas decarburization high-value product preparation reaction, and the natural gas decarburization reaction is sufficient, and long-term efficient conversion and stable operation are achieved by combining the synergistic effect of ultrasonic waves and an alternating magnetic field.

The invention relates to the technical processing field of copper powder columns, in particular to a production process of an integrated supporting copper powder column and a VC vapor chamber, and the production process comprises the following steps that a mold is provided with a plurality of powder containing units, each powder containing unit is provided with a plurality of powder preparing grooves, and the adjacent powder preparing grooves are connected through a channel; the preparation method comprises the following steps: uniformly stirring copper powder, bismuth trioxide, antimony trioxide, silver, rosin resin, an adhesive, carbon nanotubes, a pore forming agent and water to obtain mixed powder; filling the mixed powder into a powder making groove and a channel; inserting the mixed powder into the center of the powder making tank filled with the mixed powder to obtain a pre-fired product; and preheating the pre-fired product in an environment with the temperature of 200-300 DEG C, preserving heat for 40-60 minutes at the temperature of 600-800 DEG C, preserving heat for 2-3 hours at the temperature of 1070-1100 DEG C, cooling to 20-30 DEG C, and demolding to obtain a finished product. Through the design of the powder containing unit of the mold, copper column inserting firing is matched after powder filling, an integrated supporting structure is formed, the overall stability of the supporting column is enhanced, different height requirements are met, collapse and falling are avoided, and the use stability of the vapor chamber is guaranteed.

The present application relates to a kind of preparation method of bismuth trifluoride, belong to bismuth compound preparation technical field.The preparation method of bismuth trifluoride of the present application includes the following steps: bismuth-containing compound powder is hydrothermally reacted with hydrofluoric acid;The bismuth-containing compound is one or any combination of bismuth oxide, bismuth oxychloride, bismuth trichloride.The preparation method of bismuth trifluoride of the present application carries out hydrothermal reaction to bismuth oxide, bismuth oxychloride, bismuth trichloride and hydrofluoric acid, and the high temperature and high pressure generated by hydrothermal reaction are used to improve the reactivity, solve the problem that bismuth oxide, bismuth oxychloride and bismuth trichloride are not completely reacted with hydrofluoric acid under normal pressure, resulting in low yield and low purity, product can be obtained by one-step reaction.The preparation method of bismuth trifluoride of the present application is simple, and route is short, the solvent used is water, cost is low, yield is high, and it is economic and environmental protection.

The invention provides a homogeneous composite material, a composite material system, a stacking structure and a radiation protection material design method, and relates to the technical field of space radiation protection materials.The homogeneous composite material is prepared from, by mass, 10-30% of epoxy resin, 10-90% of bismuth trioxide and the balance polyethylene and boron nitride which are equal in mass fraction. According to the invention, the radiation protection material with radiation resistance and light weight can be designed.

The invention belongs to the technical field of resistor electrical elements, and particularly relates to a zinc oxide resistor with high stability and low cost and a preparation method thereof. The zinc oxide resistor comprises the following components: large-particle-size zinc oxide elementary substance powder, small-particle-size zinc oxide elementary substance powder, bismuth trioxide, bismuth stannate, nickel monoxide, manganous-manganic oxide, cobaltosic oxide, nano tin powder, diboron trioxide, nano silver powder, a binder, a dispersant and deionized water. The invention provides the preparation method of the resistor disc with low cost and high through-current impact stability, large through-current is realized, the stability is relatively good after large-current pulse surge impact, the cost is low, the resistor disc can meet the application requirements of more occasions, the cost is low, and the resistor disc is suitable for industrial popularization.

The invention belongs to the technical field of electrochemical sensing, and discloses a preparation method and application of BiOCl and a bismuth membrane electrode. The preparation method of BiOCl comprises the following steps: heating and dissolving bismuth nitrate into concentrated nitric acid, then adding bismuth trioxide into the solution, then adding concentrated hydrochloric acid, fully stirring, standing and cooling to room temperature to obtain a solution A; preparing a 15-25 wt% sodium hydroxide solution as a solution B; the preparation method comprises the following steps: adding water into a reaction container, heating to 65-85 DEG C, then adding concentrated hydrochloric acid, then adding a non-sulfur non-phosphorus surfactant while stirring, stirring until the solution is clear, simultaneously dropwise adding the solution A and the solution B into the reaction container, reacting for 15-15.5 hours, then dropwise adding the solution B again, adjusting the pH value of the solution to 9-11, cooling to room temperature, and drying to obtain the target product BiOCl. The bismuth membrane electrode is obtained by modifying a carbon fiber electrode with BiOCl. The bismuth membrane electrode can be used for detecting one or two of Pb < 2 + > content and Cd < 2 + > content in a water body / blood, and can also be used for integrating a portable heavy metal detection device.

The utility model discloses a film-coated cover plate capable of adjusting optical performance and a smart phone display screen, the film-coated cover plate capable of adjusting optical performance comprises a glass cover plate, and an aluminum oxynitride layer, a beryllium oxide layer and a bismuth trioxide layer which are arranged on the upper surface of the glass cover plate in sequence from bottom to top, the thickness of the aluminum oxynitride layer is 20nm-30nm, and the thickness of the beryllium oxide layer is 20nm-30nm. The thickness of the beryllium oxide layer ranges from 30 nm to 40 nm, and the thickness of the bismuth trioxide layer ranges from 10 nm to 20 nm. And the aluminum oxynitride layer is used as an adhesion layer, so that the adhesion between the subsequent plating layer and the glass cover plate can be enhanced. The bismuth trioxide layer serves as the outermost layer, possibly has specific optical and electrical properties and can be used for adjusting the optical performance of the coating layer, such as increasing the light transmittance and the refractive index, so that the optical performance of the coating layer is adjustable, and the competitiveness of the product is improved.

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.

The invention 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 the following components in parts by weight: 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. A compact ceramic plate is obtained through mixing, wet grinding, drying, pressing and high-temperature sintering, and the special-shaped ceramic sheet is formed through further crushing and screening. The special-shaped sheet is laid in a mold and filled with high-chromium cast iron powder, and the integrated metal-based ceramic composite lining plate with a stable structure is formed through compaction and high-temperature sintering. The prepared lining plate has the high hardness of ceramic and the toughness of metal, and is suitable for high-abrasion equipment such as a ball mill.

The invention discloses an anti-radiation shielding plate and a preparation method thereof. The anti-radiation shielding plate comprises a middle core layer and two surface reinforcing layers, wherein the two surface reinforcing layers are correspondingly compounded on the upper end face and the lower end face of the middle core layer; the middle core layer comprises the following components in percentage by mass: 25%-45% of tantalum pentoxide (Ta2O5), 26%-46% of bismuth trioxide (Bi2O3), 4%-16% of thulium oxide (TM2O3), 8%-22% of natural rubber (NR) and 2%-6% of a coupling additive; the surface reinforcing layer comprises the following components in percentage by mass: 5%-25% of boron carbide (B4C), 2%-10% of thulium oxide (TM2O3), 65%-85% of natural rubber (NR) and 2%-6% of a coupling additive. The radiation-proof shielding plate has the advantages that through function layering, material cooperation and matrix supporting, the triple core advantages of full-spectrum radiation protection, mechanical property balance and environment-friendly and convenient processing are achieved, the problems that a traditional shielding material is single in function, unbalanced in performance and serious in pollution are solved, industrial production and actual requirements are taken into consideration, and the radiation-proof shielding plate is worthy of popularization and application. And the method can adapt to multi-scene application and is high in use adaptability.

The present invention discloses a polyvinyl chloride composition and polyvinyl chloride artificial leather thereof. The polyvinyl chloride composition comprises a polyvinyl chloride resin, a plasticizer, and a flame retardant. The flame retardant comprises only bismuth trioxide or comprises both antimony trioxide and the bismuth trioxide. The present invention completely or partially replaces non-environmentally friendly antimony trioxide with environmentally-friendly bismuth trioxide, while still ensuring flame retardant performance of the polyvinyl chloride artificial leather prepared from the polyvinyl chloride composition, which not only enhances environmental protection and safety but also maintains the flame retardant performance and provides lower cost.

The invention belongs to the technical field of electronic materials, and particularly discloses a high-dispersion aluminum-doped zinc oxide varistor material and a preparation method thereof. The high-dispersion aluminum-doped zinc oxide varistor material is prepared from the following raw materials in parts by weight: 90 to 92 parts of pretreated zinc oxide, 2 to 3 parts of bismuth trioxide, 0.7 to 0.9 part of cobalt oxide, 1.5 to 1.8 parts of aluminum oxide, 1.2 to 1.5 parts of silicon dioxide, 0.6 to 0.8 part of manganese oxide, 0.07 to 0.09 part of tin oxide and 0.2 to 0.5 part of nickel sesquioxide. The zinc oxide is pretreated, agglomeration of the zinc oxide is reduced, the zinc oxide is subsequently matched with other components, the performance stability of the piezoresistor is improved, the leakage current is reduced, and the service life is prolonged.

The present invention belongs to the field of metallurgy and relates to a method for removing impurities from copper electrolysis lean liquid. The method comprises the following steps: S1: adding an oxidant and bismuth trioxide to the copper electrolysis lean liquid. After the reaction, solid-liquid separation is performed to obtain an oxidation slag and a primary impurity-removing liquid; S2: adding lead carbonate and lead oxide to the primary impurity-removing liquid obtained in step S1. After the reaction, a precipitated slag and a secondary impurity-removing liquid are obtained. The secondary impurity-removing liquid has an As concentration of ≤0.1 g / L, a Bi concentration of ≤0.05 g / L, and a Sb concentration of ≤0.05 g / L. This method can meet the requirement for returning the copper electrolysis lean liquid to electrolysis after impurity removal, while avoiding environmental pollution caused by direct discharge, resulting in significant economic and environmental benefits.

The utility model relates to a double-layer wear-resistant film-coated cover plate and a display screen comprising the same, the double-layer wear-resistant film-coated cover plate comprises a cover plate body, and a bismuth trioxide layer, a zirconium nitride layer and a niobium nitride layer are sequentially laminated on the front surface of the cover plate body; wherein the thickness of the bismuth trioxide layer is 20-30 nm, the thickness of the zirconium nitride layer is 40-50 nm, and the thickness of the niobium nitride layer is 30-40 nm. By accurately controlling the thickness and the layered structure of each material layer, the wear resistance, the corrosion resistance, the optical performance and the functionality of the glass cover plate are remarkably improved. In addition, by adjusting the thickness of each layer and optimizing the layered structure, the technology can flexibly meet specific requirements in different application scenes.

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 invention provides a preparation method of a soft and hard alternate wear-resistant reinforced layer, and relates to the field of surface treatment, comprising the following steps: step 1, pretreating a matrix; step 2, rare earth salt bath nitriding treatment: firstly preparing a dispersion colloid of bismuth trioxide nano crystal whiskers, a rare earth beta-diketone complex and bis (trifluoromethanesulfonyl) imine tributyl methyl quaternary phosphonium salt, sequentially adding a nitrogen source, sodium carbonate, sodium thiosulfate, potassium fluoborate and the composite rare earth system, and then adding the dispersion colloid and bismuth nitrate to obtain a rare earth salt bath agent; adding the pretreated matrix into a rare earth salt bath agent to obtain a nitrogen oxide layer; and step 3, laser irradiation treatment: in an argon atmosphere, strip-shaped laser irradiation is carried out on the surface of the nitrogen oxide layer at intervals by adopting a laser melting process. According to the method, a soft and hard alternate structure is prepared on the surface of the low-carbon steel through the means of combining rare earth salt bath and laser irradiation, and the wear resistance of the low-carbon steel is effectively improved.

The invention relates to the field of resistor discs, and particularly discloses a metal oxide resistor disc and a preparation process thereof, and the preparation process comprises the following steps: S1, mixing zinc oxide, antimony trioxide, chromium sesquioxide, manganese dioxide, aluminum nitrate and silver nitrate to prepare a slurry, adding a surface modifier, and mixing to prepare a mixed slurry; s2, drying the mixed slurry to obtain prefabricated powder, pre-sintering the prefabricated powder to obtain a pre-sintered mixture, grinding the pre-sintered mixture, and drying the ground pre-sintered mixture to obtain additive composite powder; s3, manganese carbonate, bismuth trioxide, nickel oxide and cobaltosic oxide are mixed to serve as an additive mixture, a tin dichloride solution is added, and a mixed solution to be deposited is prepared after stirring; s4, mixing the to-be-deposited mixed solution with an adhesive, absolute ethyl alcohol and additive composite powder, then drying, carrying out compression molding, and then carrying out calcination treatment; and S5, performing post-treatment to obtain the metal oxide resistor disc. The resistor disc has the advantages that the porosity of the resistor disc is reduced, the through-flow capacity is improved, and the electrical performance is improved.

The application belongs to the technical field of electronic ceramic materials, and particularly relates to a high-performance composite material for a phase shifter and a preparation method thereof. The high-performance composite material for the phase shifter is prepared by using regenerated iron oxide obtained by sequentially performing high-temperature roasting and alkali treatment on iron oxide waste, doping treatment of the regenerated iron oxide with cerium oxide, and then mixing the regenerated iron oxide with lithium carbonate, zinc oxide, titanium dioxide, trimanganese tetroxide, bismuth trioxide and an additive, so that the dielectric loss is effectively reduced, and the ferromagnetic resonance line width is narrowed.

The invention relates to the field of electronic materials, and particularly discloses a low-gradient zinc oxide varistor and a preparation method thereof. The invention relates to a low-gradient zinc oxide piezoresistor disc, which is prepared from the following raw materials in parts by weight: 88 to 96 parts of zinc oxide, 1.5 to 3 parts of antimony trioxide, 2 to 5 parts of bismuth trioxide, 0.2 to 1.8 parts of nickel oxide, 0.1 to 0.9 part of cobalt sesquioxide, 0.1 to 0.4 part of manganese oxide, 0.02 to 0.07 part of chromium sesquioxide, 0.15 to 0.18 part of lithium acetate, 1.2 to 1.8 parts of dispersing agents, 1.8 to 2.5 parts of binding agents, 0.12 to 0.15 part of aluminum nitrate and 0.001 to 0.003 part of silver nitrate. Under the synergistic effect of all the components, by adjusting the use ratio of all the components, the potential gradient of the resistor disc can be reduced, the large-current endurance capacity of the resistor disc is improved, and the change of electrical performance after impact is reduced.

The utility model discloses a novel film-coated cover plate capable of enhancing the durability of a film layer and a liquid crystal display screen, and the novel film-coated cover plate capable of enhancing the durability of the film layer comprises a glass cover plate, and an aluminum oxynitride layer, a silicon carbide layer and a bismuth trioxide layer which are sequentially arranged on the upper surface of the glass cover plate from bottom to top, the thickness of the aluminum oxynitride layer ranges from 50 nm to 100 nm, the thickness of the silicon carbide layer ranges from 100 nm to 200 nm, and the thickness of the bismuth trioxide layer ranges from 20 nm to 50 nm. Each layer of material is meticulously selected and designed so as to realize specific functions and benefits. The aluminum oxynitride of the bottom layer provides good adhesive force and protection, the silicon carbide of the middle layer enhances wear resistance and thermal management capability, and the bismuth trioxide of the surface layer is used for adjusting optical performance. The design of the layered structure not only considers the unique properties of the materials, but also considers the interaction among the materials, so as to ensure that the final product shows excellent comprehensive performance in practical application.

The invention belongs to the technical field of resistor electrical elements, and particularly relates to a preparation method of a zinc oxide resistor with high gradient, large through-flow and stable impact. The zinc oxide resistor comprises zinc oxide, bismuth trioxide, antimony trioxide, nickel sesquioxide, manganous-manganic oxide, cobaltosic oxide, tin dioxide, diboron trioxide, nano silver powder, aluminum nitrate nonahydrate, barium acetate, a binder, a dispersing agent and deionized water. The zinc oxide varistor designed by the invention has the advantage of good stability under high gradient and large flux, overcomes the degeneration behavior of the zinc oxide varistor caused by the influence of the existing large-current surge impact on the zinc oxide crystal boundary potential barrier, and is suitable for industrial popularization.

The invention relates to the technical field of nickel-zinc batteries, in particular to negative electrode slurry for a nickel-zinc battery and a preparation method and application thereof.The negative electrode slurry is prepared from, by mass, 0.2-0.4 part of hydroxyethyl cellulose, 50-55 parts of zinc oxide, 15-17 parts of zinc powder, 0.1-0.3 part of dispersing agent, 3-5 parts of nanometer aluminum oxide, 1.5-2 parts of bismuth trioxide, 0.03-0.1 part of indium oxide, 0.1-0.3 part of potassium fluoride, 4-5 parts of polytetrafluoroethylene solution and 17-21 parts of water. According to the negative electrode slurry for the nickel-zinc battery as well as the preparation method and the application of the negative electrode slurry, the cycle life is prolonged, the rate capability is improved, and the defects in the prior art are overcome.

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 invention relates to a preparation method and application of a bismuth trioxide anchored metal-organic framework catalyst, belongs to the field of electrode materials for catalyzing reduction of carbon dioxide, and particularly relates to a method for constructing an MOF confined Bi catalyst through a subject-object synthesis strategy by using a metal-organic framework material (MOF: PCN-222) with a clear structure and coordination as a carrier. And high-activity and high-stability electrocatalytic CO2 reduction is realized. According to the present invention, the reaction activity of the catalyst added with different Bi (NO3) 3.5 H2O ratios is compared through the electrochemical test, the final product Bi2O3 (at) PCN-222-2 sample has the optimal performance, the HCOOH Faraday efficiency can achieve 89.42% in the carbon dioxide saturated 0.005 M H2SO4 solution and the 0.5 M K2SO4 solution at the-1.8 V vs.RHE potential, and the HCOOH partial current density can achieve-268.7 mA cm <-2 >. The Bi2O3-coated PCN-222-2 catalyst material prepared by the method has an extremely high industrial application prospect in electroreduction of carbon dioxide, and can be widely applied to the field of electroreduction of carbon dioxide electrochemical energy storage devices.

The invention relates to the technical field of special ceramic product manufacturing, and discloses a PTC ceramic material for water circulation electric heating and a preparation method and application of the PTC ceramic material for water circulation electric heating. According to the preparation method, an oxygen partial pressure environment is adjusted in a sintering cooling section, and a grain boundary modifier is induced to spread on the surface of the grain in a self-organizing manner and is condensed to form a film, so that an ion immobilization layer with a charge compensation function is constructed; the interface blocking structure is used for blocking a moisture permeation path, the electrochemical stability of the material in a pressure-bearing hot water circulation environment is ensured, Curie temperature drift is inhibited, and the ceramic valve plate is suitable for manufacturing a ceramic valve plate in an electric heating system.

The invention belongs to the technical field of electronic ceramic materials, and particularly relates to a high-performance composite material for a phase shifter and a preparation method of the high-performance composite material. The high-performance composite material for the phase shifter is prepared by sequentially performing high-temperature roasting and alkali liquor treatment on the iron oxide waste, performing doping treatment in cooperation with the dicerium trioxide to obtain regenerated iron oxide, and then jointly preparing the regenerated iron oxide, the lithium carbonate, the zinc oxide, the titanium dioxide, the manganous-manganic oxide, the bismuth trioxide and the additive, so that the dielectric loss is effectively reduced, and the performance of the phase shifter is improved. And the ferromagnetic resonance line width is narrowed.

The invention belongs to the technical field of metallurgy, and relates to a copper electrolysis barren solution impurity removal method which comprises the following steps: S1, adding an oxidizing agent and bismuth trioxide into a copper electrolysis barren solution, and after reaction, carrying out solid-liquid separation to obtain oxidizing slag and a primary impurity removal solution; and S2, adding lead carbonate and lead oxide into the primary impurity removal liquid obtained in the step S1, and reacting to obtain precipitation slag and secondary impurity removal liquid. And in the secondary impurity removal liquid, the As concentration is less than or equal to 0.1 g / L, the Bi concentration is less than or equal to 0.05 g / L, and the Sb concentration is less than or equal to 0.05 g / L, so that the requirement that the copper electrolysis barren solution is returned for electrolysis after impurity removal can be met, meanwhile, the environmental pollution caused by direct discharge is avoided, and the economic benefit and the environmental benefit are remarkable.

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.