290 results about "Zirconium dioxide" patented technology

The invention discloses a preparation process of an aluminum oxide ceramic material, which comprises the following steps: S1, pretreatment of aluminum oxide powder: taking alpha-Al2O3 powder as a raw material, adding a dispersion medium, carrying out ball milling, transferring into an ultrasonic dispersion machine, dispersing, and further carrying out vacuum drying to obtain pretreated aluminum oxide powder; s2, chemical activation treatment: weighing pretreated aluminum oxide, magnesium oxide, nano silicon dioxide, calcium oxide, zirconium dioxide, titanium dioxide and modified nano silicon carbide in parts by weight, mixing, sequentially adding a dispersing agent absolute ethyl alcohol and a KH550 silane coupling agent, stirring at a high speed, adding a polyvinyl alcohol binder, and continuously stirring to obtain ceramic slurry; s3, sieving the ceramic slurry, filling the ceramic slurry into a mold, and performing isostatic pressing to obtain a ceramic green body; and S4, putting the ceramic green body into a box-type sintering furnace, sintering step by step, and cooling to room temperature along with the furnace to obtain the aluminum oxide ceramic material. The prepared aluminum oxide ceramic material has high compactness, excellent dielectric strength and mechanical property, low energy consumption and great application potential.

The invention relates to the technical field of piezoelectric light-transmitting functional ceramics, and discloses a high-light-transmitting ceramic material and a preparation method thereof.The preparation method comprises the following preparation steps that sodium carbonate, potassium carbonate, niobium pentoxide, antimony trioxide, samarium oxide and zirconium dioxide powder raw materials are taken, and after primary ball milling and drying are conducted on the powder raw materials, mixed powder is obtained; carrying out pre-sintering and secondary ball milling on the mixed powder, carrying out compression molding to form a tablet, and sintering and polishing the tablet to obtain a ceramic matrix; and spraying the composite slurry to the surface of a ceramic matrix, carrying out heat treatment, and cooling to room temperature to obtain the high-transmittance ceramic material. The antimony trioxide, the samarium oxide and the zirconium dioxide are co-doped, an antimony-samarium-zirconium liquid phase is generated in the ceramic material, pores of the ceramic material are filled and eliminated, and the prepared ceramic material has excellent optical transmittance, piezoelectric property and mechanical strength.

The present disclosure provides a new wet atomic layer etch (ALE) process for etching high-k dielectric materials. More specifically, the present disclosure provides various embodiments of methods that utilize new etch chemistries for etching transition metal oxide dielectric materials in a cyclic wet ALE process. In the example embodiments provided herein, new etch chemistries and methods are provided for etching zirconium dioxide (ZrO2), hafnium dioxide (HfO2) and HfxZr(1-x)O2 dielectrics in a cyclic wet ALE process. However, the wet ALE techniques described herein are not strictly limited to the example materials discussed herein and can be applied to other transition metals and transition metal oxides.

The invention provides a granulation raw material, a pre-sintered body, a zirconia porcelain block, a fast firing production method and application. The fast firing production method comprises the following steps: S1, providing a first zirconium oxide material and a second zirconium oxide material; s2, compounding the first zirconium oxide material and the second zirconium oxide material, and granulating together with an auxiliary material to obtain a granulation raw material; s3, obtaining a green body based on the granulation raw materials; s4, carrying out pre-sintering treatment on the green body to obtain a pre-sintered body; and S5, machining the pre-sintered body, and then carrying out fast firing treatment to obtain the zirconium oxide porcelain block. On the basis of compounding of granulation raw materials, the overall performance of the zirconia ceramic block can be improved while a pre-sintered body can be rapidly sintered.

The invention discloses a high-aluminum wear-resistant ceramic grinding ball and a preparation method thereof. The grinding ball comprises the following raw materials in percentage by weight: 85%-95% of aluminum oxide, 2%-10% of silicon dioxide, 1%-3% of calcium carbonate, 0.2%-0.5% of magnesium carbonate, 0.03%-0.05% of titanium dioxide, 0.01%-0.03% of sodium oxide and 1%-5% of modified zirconium dioxide. The preparation method of the modified zirconium dioxide comprises the following steps: adding hydrogen peroxide into a mixed solution of soluble cerium salt and soluble zirconium salt to obtain a reaction system; adding the reaction system into an alkaline solution for reaction, and collecting an insoluble substance after the reaction is finished; and calcining the insoluble substance to obtain the modified zirconium dioxide. The ceramic ball is simple in formula, rich in raw materials, low in price and low in production cost, the operation stability of the ceramic ball is improved, and the service life is prolonged.

The invention relates to preparation of a ZTA composite ceramic material, and belongs to the field of inorganic nonmetal composite materials. The raw material composition formula comprises aluminum oxide, zirconium oxide, zirconium dioxide, yttrium oxide, magnesium oxide and titanium dioxide. The low-sodium microcrystalline alumina powder with the original grain size of 0.40 [mu] m is selected and ground to the original grain size in advance, so that zirconia can be more uniformly distributed between alumina grain boundaries, which is a precondition for obtaining more uniform ZTA. Zirconium dioxide is creatively introduced, and compared with a conventional method in which stable zirconium oxide is directly used, the cost of ZTA is greatly reduced. The pre-calcined granulation powder is adopted, so that a ZTA product which is uniformly mixed in the early stage is cured by adding a stabilizer, and then the uniform and stable ZTA ceramic can be obtained through later-stage forming and firing.

The invention provides a PDA-ZrO2 coated zinc anode, a preparation method thereof and a battery, and belongs to the technical field of electrochemical energy storage materials. According to the zinc anode, a polydopamine-zirconium dioxide composite protective layer is constructed on the surface of a zinc substrate. According to the composite layer, a polydopamine bottom layer is formed through self-polymerization of dopamine on the surface of the zinc foil, and then a zirconium dioxide layer is introduced on the polydopamine bottom layer through an in-situ mineralization method. The PDA-ZrO2 composite layer disclosed by the invention has the main advantages that the PDA-ZrO2 composite layer ingeniously combines the strong adhesive force, excellent flexibility and ion regulation and control capability of polydopamine and the high mechanical strength and chemical stability of zirconium dioxide. The synergistic effect of'soft and hard combination 'can effectively homogenize zinc ion flow, inhibit dendritic crystal growth and block side reaction caused by water molecules, so that the interface stability of the zinc metal anode is remarkably improved, and the cycle life of the zinc metal anode is remarkably prolonged. The preparation method is simple in process, mild in condition and easy for large-scale production.

The invention discloses a toughened glass ceramic and a preparation method thereof, and relates to the technical field of glass ceramics, and the toughened glass ceramic comprises the following components in percentage by weight: 64 to 68 weight percent of silicon dioxide, 22.67 to 26.5 weight percent of lithium oxide, 0.9 to 1.2 weight percent of antibacterial agent, 0.8 to 1.1 weight percent of modified mica powder, 1.98 to 2 weight percent of aluminum oxide, 1.78 to 1.8 weight percent of potassium oxide, 1.68 to 1.7 weight percent of zirconium dioxide, 1.19 to 1.2 weight percent of phosphorus pentoxide and 1 to 3 weight percent of calcium fluoride. According to the toughened glass ceramic and the preparation method thereof, a multi-scale anti-cracking network is formed through macroscopic crack deflection of mica and nanoscale phase change toughening of zirconium oxide, the fracture toughness is remarkably improved, zirconium oxide agglomeration can be reduced through interface optimization of modified mica powder, zirconium oxide is dispersed more uniformly, and the phase change potential is further exerted; due to high-temperature stability of aluminum oxide, antibacterial agent particles can be wrapped, and excessive volatilization or aggregation of the antibacterial agent particles in the sintering process is prevented; aluminum oxide is used as a'protective shell 'to delay the Cu < 2 + > release rate and realize long-acting antibiosis.

The invention relates to a base metal high-voltage multilayer ceramic dielectric capacitor and a preparation method, the base metal high-voltage multilayer ceramic dielectric capacitor is formed by stacking and firing dielectric layers, and each dielectric layer comprises a dielectric layer and an electrode printed on the dielectric layer. The dielectric layer comprises the following raw materials: a BMYT main matrix, an NN material, magnesium oxide, manganous-manganic oxide, zirconium dioxide, calcium carbonate, strontium carbonate and rare earth oxide; through the raw material composition and the preparation method of the ceramic dielectric capacitor, the prepared ceramic dielectric capacitor has excellent performances of high dielectric constant, high voltage resistance, stable dielectric-temperature characteristic curve, low loss, high insulation resistance, long-term high-voltage reliability and the like under the condition of high dielectric thickness (30 microns before firing).

The invention provides a preparation method and application of a wear-resistant and corrosion-resistant glass flake coating, and belongs to the technical field of coatings. The coating comprises a component A and a component B, wherein the component A comprises an epoxy resin matrix, a reinforcing filler, a self-repairing microcapsule and an auxiliary agent; the epoxy resin matrix is formed by compounding at least two different types of epoxy resin components, the first epoxy resin component is matrix resin, and the second epoxy resin component is toughening modified resin; the reinforcing filler comprises glass flakes subjected to surface modification, functionalized graphene and nano zirconium dioxide particles; the self-repairing microcapsule comprises a microcapsule wall and a self-repairing agent coated in the microcapsule wall; the auxiliary agent comprises a rheological auxiliary agent, a defoaming agent and a wetting dispersant; and the component B comprises a curing agent and a curing accelerator. The comprehensive wear resistance and corrosion resistance of the coating can be remarkably improved, and the construction adaptability of the coating is improved.

A glass composition includes silicon dioxide, aluminum oxide, diboron trioxide, fluorine, zinc oxide, a first component including calcium oxide, and a second component including zirconium dioxide and manganese oxide. Based on 100 wt % of the glass composition, the silicon dioxide is present in an amount ranging from 52 wt % to 62 wt %, the aluminum oxide is present in an amount ranging from 8 wt % to 13 wt %, the diboron trioxide is present in an amount ranging from 19 wt % to 31 wt %, and the fluorine is present in an amount of greater than 0 wt % and not greater than 2 wt %. Based on 100 wt % of the glass composition, the zinc oxide is present in an amount of equal to or greater than 0 wt % and less than 0.25 wt %. A glass or a glass fiber including the glass composition, and a product including the glass fiber are also provided.

The zirconium dioxide raw material feeding equipment with the cleaning function comprises a feeding frame and a feeding mechanism connected to the feeding frame, the feeding mechanism comprises a motor, two rotating rollers and a conveying belt, the motor is used for driving the rotating rollers to rotate, the two rotating rollers are in transmission connection through the conveying belt, and the conveying belt is used for conveying zirconium dioxide raw materials. One end of the bottom of the feeding frame is connected with a discharging plate used for scraping materials on the surface of the conveying belt, the discharging plate is connected with a beating mechanism used for beating the discharging plate, the rotating roller is connected with a transmission mechanism, and the transmission mechanism is connected with the beating mechanism. The discharging plate can scrape materials attached to the surface of the conveying belt, the materials slide down along the side face of the discharging plate, the conveying belt can be cleaned, meanwhile, the materials can be fully utilized conveniently, the waste phenomenon is avoided, the beating head conducts beating operation on the discharging plate, generated vibration enables the materials to slide down smoothly, and the conveying belt is prevented from being damaged. And manual cleaning operation is not needed.

The invention relates to the technical field of metal superfine powder preparation, in particular to a manufacturing process of nanoscale zirconium powder for electric vacuum, high-purity sponge zirconium is used as a raw material, and after being crushed by zirconium oxide equipment, the high-purity sponge zirconium is subjected to wet ball milling, freeze drying, low-temperature vacuum deoxidation and two-step passivation in an inert atmosphere. During wet ball milling, a potassium iodate-polyvinylpyrrolidone coating aid is added, so that iodate radicals are slowly released and generate a compact zirconium dioxide passivation film with zirconium powder, iodide ions are adsorbed, oxidation and agglomeration are inhibited, and steric hindrance of polyvinylpyrrolidone further stabilizes the particle size; the iodine element is sublimated and removed through low-temperature vacuum deoxidation treatment, polyvinylpyrrolidone is completely decomposed, the oxygen content of the zirconium powder is controlled to be 0.10-0.15 wt%, the particle size of a final product is 30-40 nm, the span is smaller than or equal to 2.0, and the oxygen content is smaller than or equal to 0.15%, and the zirconium powder manufactured through the method is narrow in particle size distribution, low in key impurity content and high in purity and is suitable for electric vacuum devices.

The invention discloses a prime coat current collector and a preparation method thereof, a pole piece and a battery. The prime coat current collector comprises a polymer base material layer, a metal layer and a lithium iron phosphate material layer, metal layers are respectively arranged on two side surfaces of the macromolecular base material layer; lithium iron phosphate material layers are respectively arranged on the metal layers on the two sides; the lithium iron phosphate material layer comprises the following components: lithium iron phosphate, zirconium dioxide and a conductive material. According to the scheme of the base coating current collector, the lithium iron phosphate material layer is used for replacing a traditional carbon coating layer, components of the base coating current collector are optimized, zirconium oxide is introduced into the lithium iron phosphate material layer and is compounded with a ternary material, and triple improvement of structure strengthening, interface optimization and performance collaboration is achieved; the bottlenecks of a single material in the aspects of energy density, safety, cycle life and the like are solved.

The invention discloses modified zirconium dioxide, a water phase modification method and application of the modified zirconium dioxide in rubber. The aqueous phase modification method comprises the following steps: adding zirconium dioxide nanoparticles into water to prepare slurry; a silane coupling agent is dropwise added into the slurry, the dropwise adding rate is 0.5-30 mL / min, after dropwise adding is finished, stirring continues to be conducted for 2-20 hours, solids are separated out, washing and drying are conducted, and the modified zirconium dioxide is obtained. According to the invention, water is used as a modification system solvent, the silane coupling agent is used for modifying zirconium dioxide, and the dropwise adding rate of the silane coupling agent is specially controlled, so that the modification process is controlled; the modification process is simple in technology and does not need an organic solvent. And after the zirconium dioxide nanoparticles are modified, double-bond groups are introduced, so that the cross-linking effect between the zirconium dioxide nanoparticles and the rubber is enhanced, and the mechanical property of the composite material is improved.

The present invention relates to a method for manufacturing an antibacterial polyurethane lens using coated silver ion-loaded zirconium dioxide. First, the inner and outer surfaces of a resin lens are hardened, and the resin lens is immersed in an organosilicon solution. After the organosilicon adheres to the inner and outer surfaces of the resin lens, the lens is oven-cured. The polyurethane lens hardened sheet with the cured surface is then vacuum-coated to deposit materials of different refractive indices on both sides of the resin lens hard film. Subsequently, silver ion-loaded zirconium dioxide is used as a coating material and vacuum-coated on both surfaces of the lens to achieve the antibacterial effect of the lens. The present application prepares silver ion-loaded zirconium dioxide particles, and the silver ions are evenly dispersed and can be evenly distributed on the lens surface, so that the antibacterial properties of the upper and lower surfaces of the lens are consistent. The silver ion-loaded zirconium dioxide particles are directly used as the lens coating material, which optimizes the coating process of the antibacterial polyurethane lens, and the polyurethane lens obtains a good antibacterial effect.

The invention provides modified zirconium boride ceramic, a preparation method and application of the modified zirconium boride ceramic in electrolytic aluminum, and belongs to the technical field of ceramic. The preparation method comprises the following steps: preparing zirconium dioxide sol, preparing a reinforcing phase, coating and sintering. The step of preparing the zirconium dioxide sol comprises the following steps: adding a rare earth solution into a zirconium source solution, controlling the adding rate of the rare earth solution to be 1.5-2.0 g / min, stirring while adding, stirring at 42-45 DEG C for 30-35 min, stirring at 60-63 DEG C for 40-50 min, adjusting the pH to 3.2-3.5, adding polyethylene glycol 2000 after aging, and stirring for 50-60 min to obtain the zirconium dioxide sol; the prepared modified zirconium boride ceramic is high in strength, excellent in high-temperature oxidation resistance and thermal shock resistance and good in corrosion resistance, and the stability of the electrolysis process can be effectively guaranteed.

The invention relates to the technical field of getters, and discloses a getter for a vacuum insulated panel and a preparation method of the getter. The getter for the vacuum insulated panel comprises the following components in percentage by mass: 55-65% of calcium oxide, 12-18% of activated aluminum oxide, 6-8% of manganese dioxide, 4-6% of copper oxide, 3-5% of yttrium oxide, 5-7% of zirconium dioxide and 1-2% of chromium powder. The preparation method of the getter comprises the following steps: S100, carrying out ball milling treatment on calcium oxide, activated aluminum oxide, manganese dioxide, copper oxide, yttrium oxide, zirconium dioxide and chromium powder to obtain powder, and drying the powder; s200, mixing the dried powder with deionized water and polyvinyl alcohol, and drying to prepare porous spherical particles; s300, after gradient sintering is conducted on the porous spherical particles, rapid cooling is conducted, and particles of a multi-stage pore channel structure are obtained; and S400, dipping the particles with the hierarchical porous structure in a chromic acid solution, and drying to obtain the getter. According to the technical scheme, the technical problems of low efficiency and insufficient adsorption capacity of a getter in the prior art are solved.

The invention discloses ultralow-loss manganese zinc ferrite and a preparation method thereof, and belongs to the technical field of ferrite soft magnetic materials. The ultralow-loss manganese zinc ferrite comprises the following raw materials: a main component, a first additive and a second additive, the main components comprise Fe2O3, ZnO and MnO; the first additive comprises one or more of SiO2 (silicon dioxide), TiO2 (titanium dioxide) and ZrO2 (zirconium dioxide); and the second additive is prepared from one or more of CaCO3, Co3O4, CuO and Al2O3. According to the invention, through step-by-step addition of the specific additives, comprehensive and effective reduction of the loss of the manganese-zinc ferrite core is finally realized, and the performance goal of ultra-low loss is achieved.

The utility model discloses a zirconium dioxide false tooth polishing device, which relates to the technical field of false tooth polishing, and comprises a mounting main body, and further comprises a sealing door which is arranged on the mounting main body and is rotationally connected with the mounting main body; the placing groove is formed in the mounting main body and is fixedly connected with the mounting main body; the dust storage barrel is arranged in the placing groove and is used for collecting dust; the grip is arranged on the mounting main body and is fixedly connected with the mounting main body; the polishing mechanism is arranged on the mounting main body; and the dust collection mechanism is arranged on the mounting main body and the polishing mechanism. According to the device, by arranging the dust collection mechanism, dust generated in the grinding work can be cleaned in time, the cleanliness of the working environment and the safety of workers are guaranteed, meanwhile, dust on false teeth is cleaned in time, and the judgment on the cleaning degree of the surfaces of the false teeth can be more accurate during working.

This invention belongs to the field of glass technology and relates to a high-temperature resistant structural glass material, its preparation method, and its applications. The glass is composed of the following components by mass percentage: 60%-70% silicon dioxide, 5.5%-11% boric acid, 0.1%-5% aluminum hydroxide, 0%-3% potassium nitrate, 5.5%-13% potassium carbonate, 0%-12% sodium carbonate, 0.1%-4% calcium carbonate, 0%-2% calcium fluoride, 0%-1% lithium carbonate, 0%-2% basic magnesium carbonate, 0.1%-1% titanium dioxide, 0%-2% zirconium dioxide, and 0%-1% cerium dioxide; the total mass percentage of potassium nitrate, potassium carbonate, sodium carbonate, and lithium carbonate does not exceed 22%. This structural glass possesses a high softening temperature, a suitable coefficient of thermal expansion, high-temperature resistance, thermal shock resistance, and processing performance, making it suitable as a structural material for optoelectronic devices.

The invention relates to the technical field of sectional material production, and discloses a fiber anisotropic reinforced sectional material and a manufacturing process thereof.The sectional material comprises axial continuous fibers, a fiber weaving and winding pipe sleeve wrapping the axial continuous fibers and thermosetting resin added with whiskers and zirconium dioxide microbeads, the fiber weaving and winding pipe sleeve provides radial and circumferential mechanical reinforcement for the sectional material, and the fiber weaving and winding pipe sleeve is used for wrapping the fiber weaving and winding pipe sleeve and thermosetting resin added with the whiskers and the zirconium dioxide microbeads; the manufacturing process comprises the following steps: preparing a composite fiber preform by adopting multi-stage weaving and winding; introducing the mixture into a closed mold and forcibly infiltrating the mixture by a high-pressure glue injection system; carrying out segmented curing in a mode of combining in-mold primary heating and out-mold supplementary heating; and finally, drawing, cleaning and coating to obtain a finished product. Through collaborative innovation of the structure and the process, the problems that a traditional pultrusion profile is fragile in transverse performance, defects are prone to occurring in the interior and the production efficiency is low are effectively solved, and the fiber anisotropic reinforced profile which is balanced in mechanical property, high in interior quality and remarkably improved in production efficiency is obtained.

This invention discloses a high-strength ceramic valley-peak structured corrugated filler, the raw materials of which include clay, kaolin, potassium feldspar powder, cordierite powder, zirconium dioxide powder, reinforcing granular powder, bauxite, and a binder. The corrugated filler material prepared by the method described in this invention has good strength, making it less prone to breakage during stacking or use, thus improving the usability and durability of the corrugated filler.

The invention discloses a four-phase composite ceramic heating element and a preparation method thereof, and relates to the technical field of ceramic heating materials, the composite ceramic heating element comprises the following components: 30%-40% of titanium diboride, 30%-40% of titanium carbide, 10%-28% of silicon carbide, 1%-12% of hexagonal boron nitride, 0.5%-3% of nano zirconium dioxide and 1%-4% of silicon nitride. A four-phase composite system of TiB2 (titanium diboride), TiC (titanium carbide), SiC (silicon carbide) and hBN (hexagonal boron nitride) is constructed, basic expansion reduction is achieved through the low expansion characteristic of SiC, thermal expansion mismatching stress between different phases is dispersed in combination with the interface regulation and control effect of an h-BN layered structure, compared with an existing ternary system, the minimum thermal expansion coefficient is reduced to 5.8 * 10 <-6 > K <-1 >, and the thermal expansion coefficient is reduced to 5.8 * 10 <-6 > K <-1 >. And the interfacial compatibility is remarkably improved, and thermal stress is prevented from being gathered at the interface.

The invention relates to the technical field of fibers, and discloses a heating temperature-regulating fiber and a preparation method thereof. A photo-thermal material graphene-loaded zirconium dioxide composite material is prepared and is introduced into a phase-change material as a light-absorbing and heating material, a photo-thermal heat storage additive with good heat resistance is prepared, the photo-thermal heat storage additive and a compatilizer maleic anhydride grafted polypropylene are jointly added into polypropylene slices for melt spinning, and the prepared fiber has light-absorbing and heating and energy-storage and temperature-regulating properties; maleic anhydride grafted polypropylene is introduced, carboxyl of the maleic anhydride grafted polypropylene can react with epoxy groups of the photo-thermal heat storage additive under the melting condition, the maleic anhydride grafted polypropylene is used as a compatilizer to improve the compatibility among the components, and meanwhile, the moisture absorption performance of the fiber is also improved due to the introduction of the carboxyl.

The invention discloses a method for synthesizing zirconium silicate ceramic by using mineralizer assisted solid phase sintering, relates to the technical field of ceramic manufacturing, and aims to solve the problem of developing a novel and efficient mineralizer system. The preparation method comprises the following specific steps: S1, mixing nanoscale zirconium dioxide, silicon dioxide, a mineralizing agent and a grinding solvent in an agate mortar, and pressing to obtain a rough blank; and S2, heating the rough blank to 900-1500 DEG C at a speed of 5 DEG C / min in a muffle furnace, and sintering for 6 hours to obtain the ZrSiO4 ceramic body.

The invention discloses a glass surface multifunctional coating structure as well as a preparation method and application thereof, and belongs to a functional inorganic thin film technology. The method specifically comprises the following steps: firstly, coating a glass substrate with hollow silicon dioxide nanosphere sol to form an initial coating; the acidified hard component sol and the acidified hydrophilic component sol are uniformly mixed, the hard component sol adopts aluminum oxide sol, zirconium dioxide sol or cerium dioxide sol, and the hydrophilic component sol adopts titanium dioxide sol, zinc oxide sol or tin dioxide sol; and coating the surface of the glass substrate containing the initial coating with the mixed sol, carrying out heat treatment annealing, and finally obtaining a compact and stable multifunctional composite coating structure on the surface of the glass. Through a porous framework and inorganic binding phase composite structure, high light transmittance, high mechanical strength and a self-cleaning function are synergistically realized, and the problem that the performances are difficult to balance in the prior art is solved.

The present invention relates to a catalyst for the low-temperature catalytic combustion of dichloromethane, its preparation method, and application. The catalyst comprises a carrier zirconium dioxide and supported tungsten and chromium, wherein the tungsten and chromium are both present in the form of oxides, with the mass fractions of tungsten and chromium being 1-30wt% and 1-12wt%, respectively. Compared with the prior art, the catalyst of the present invention can effectively inhibit the chlorination reaction and has the advantages of high efficiency and stability.

This invention relates to the field of ceramic materials, specifically 98% alumina photovoltaic insulating ceramics. The 98% alumina photovoltaic insulating ceramics are prepared by the following steps: preparation of a toughening agent; airflow mixing of alumina powder and a composite sintering agent; preparation of a ceramic composite slurry; and sintering of the ceramic composite slurry. This invention prepares a toughening agent with single-walled carbon nanotubes, silicon nitride, and zirconium dioxide as its main components. The modified single-walled carbon nanotubes possess excellent mechanical properties and thermal conductivity. The system formed by silicon nitride, zirconium dioxide, and ethyl cellulose simultaneously enhances the stability of the toughening agent. During subsequent sintering, the decomposition products of ethyl cellulose prevent the decomposition of silicon nitride, allowing silicon nitride and zirconium dioxide to better inhibit the growth of alumina grains, thus significantly improving the toughness of the alumina ceramic. Adding this toughening agent to alumina ceramics can greatly hinder the generation and propagation of ceramic cracks, thereby improving the toughness of the 98% alumina photovoltaic insulating ceramics.

The invention discloses a WS2 negative electrode material and a preparation method thereof, a negative electrode and a supercapacitor, and the preparation method comprises the following steps: S1, carrying out the hydrothermal synthesis reaction of tungsten disulfide and germanium dioxide, and obtaining a doped material; s2, germanium dioxide in the doped material is extracted through a solution etching extraction method, and a porous WS2 material is obtained; and S3, carrying out hydrothermal reaction on the porous WS2 material, a cross-linking agent and zirconium dioxide to obtain the modified WS2 negative electrode material. Through the porous structure, crosslinking and ZrO2 doping, the negative electrode material can maintain high specific surface area and has structural stability and high conductivity at the same time, so that the large-current charge-discharge performance of the supercapacitor is remarkably improved.