31 results about "Barium zirconate" patented technology

The invention discloses a barium zirconate titanate-based ceramic capacitor dielectric material and a preparation method thereof. The ceramic material comprises the following components: (1-x) Ba (ZryTi1-y) O3-xCa (V2 / 3Mg1 / 3) O3, ZnO and MnO2, the preparation method comprises the following steps: firstly, mixing a Ba source, a Zr source, TiO2, a Ca source, V2O5 and a Mg source, then carrying out hydrothermal reaction, carrying out suction filtration and drying on the product to prepare main crystal phase powder, then adding MnO2 and ZnO into the main crystal phase powder, and carrying out grinding, granulation, molding, glue discharging and sintering to prepare the ceramic capacitor dielectric material. According to the ceramic material disclosed by the invention, the aims of improving the dielectric temperature stability of a capacitor ceramic dielectric and reducing the dielectric loss are fulfilled through the combined action of an A and B site ion compound perovskite compound system consisting of barium zirconate titanate and calcium vanadium magnesium acid and the secondary dopant.

The invention discloses a heat treatment method of high-polarization-intensity bismuth ferrite-lead titanate-barium zirconate titanate based ferroelectric ceramic, which comprises the following steps: arranging an electrode on the surface of a bismuth ferrite-lead titanate-barium zirconate titanate based ferroelectric ceramic sintered body, and then putting the sintered body into a rapid annealing furnace; the preparation method comprises the following steps: heating to 550-650 DEG C from room temperature at a heating rate of 5-80 DEG C / s, carrying out heat preservation for 45-75 seconds, carrying out first rapid annealing, and cooling to room temperature at a cooling rate of 250-350 DEG C / s, thereby obtaining the bismuth ferrite-lead titanate-barium zirconate titanate based ferroelectric ceramic. The heat treatment method provided by the invention can rearrange defects in the ceramic, increase domain conversion switches, improve the performance of the ceramic, and improve the performance of the ceramic. Furthermore, the ferroelectric piezoelectric property of the polarized BF-PT-BZT ceramic is greatly improved, and meanwhile, the polarized BF-PT-BZT ceramic has high Curie temperature.

The invention provides a ceramic-based friction material of an automobile brake friction lining and a preparation process of the ceramic-based friction material. The ceramic-based friction material is prepared from the following raw materials: 10 to 15 percent of boron nitride nanotube modified silicon carbide, 15 to 20 percent of titanium aluminum carbon, 5 to 8 percent of modified barium zirconate nanofiber, 12 to 15 percent of rare earth modified aluminum oxide, 8 to 10 percent of basalt fiber, 6 to 8 percent of molybdenum sulfide / graphene hybrid material, 5 to 7 percent of nano zirconite, 3 to 5 percent of titanium nitride powder, 4 to 6 percent of ferrophosphorus alloy powder, 3 to 5 percent of phenolic resin and 2 to 3 percent of potassium silicate solution. 1-2% of borosilicate glass powder and the balance of hierarchical porous carbon fibers. The obtained ceramic-based friction material of the automobile brake friction lining has the comprehensive advantages of high temperature resistance, friction resistance, bending resistance, high impact resistance, capability of reducing brake noise and the like.

This invention relates to the field of refractory materials, specifically to a refractory material resistant to manganese ferroalloy (MFC) erosion and its preparation method. It addresses the problems of existing refractory materials suffering from long-term MFC erosion, carbon oxidation leading to micropores, and unstable boundary conditions causing a decrease in the melting point of the reactive metamorphic layer, resulting in MFC erosion growing inwards and a short service life. The working layer, by weight, consists of 80-95 parts of ASC brick base material, 2-7 parts of modified filler, and 10-20 parts of interface isolation material. The modified filler is barium zirconate or zirconium silicate, and the modified material is tantalum nitride. The mass ratio of filler to tantalum nitride is 1-6:1. The interface isolation material is composed of magnesium phosphate, aluminum phosphate, and tungsten carbide, with a mass ratio of magnesium phosphate, aluminum phosphate, and tungsten carbide of 4-6:4-6:8-12. This invention enables the refractory material to possess extremely high MFC resistance, significantly extending its service life.

The application discloses a preparation method for improving stability of a proton conductor electrolyte in carbon dioxide, relates to the technical field of solid oxide batteries and solid oxide electrolysis cells, and is characterized by the following steps: through a nano-additive surface modification method, a nano-structure additive of an alkaline earth metal oxide, or a transition metal oxide, or a VA main group metal oxide is prepared on the surface of a barium cerate and a barium zirconate series electrolyte obtained through a solid phase reaction method by using a vacuum impregnation method, and an alkaline proton conductor electrolyte with a surface modification additive is obtained. The alkaline proton conductor electrolyte with the surface modification nano-structure additive obtained by the application can be applied to a proton type carbon hydrogen ceramic membrane fuel cell or high-temperature electrolysis carbon dioxide, so that the stability of the electrolyte can be effectively enhanced, and ohmic loss can be reduced, thereby greatly improving the performance and stability of the solid oxide fuel cell and the electrolysis cell under a carbon dioxide atmosphere.

The invention provides a high-voltage ceramic capacitor and a manufacturing method thereof, and relates to the technical field of electronic materials, the high-voltage ceramic capacitor comprises a ceramic dielectric layer and an electrode layer, the ceramic dielectric layer is prepared from the following raw materials in percentage by weight: 85% of barium titanate (BaT iO3), 10% of barium zirconate (BaZrO3), 3% of yttrium oxide (Y2O3) and 2% of niobium pentoxide (Nb2O5), by optimizing the formula and the preparation process of the ceramic dielectric layer, the dielectric constant of the high-voltage ceramic capacitor is remarkably improved, the high-voltage ceramic capacitor has excellent voltage resistance, reliable operation of equipment under a high-voltage condition is ensured, the risk of faults caused by voltage fluctuation is reduced, and the service life of the high-voltage ceramic capacitor is prolonged. In addition, the multi-layer metallized electrode structure effectively improves the mechanical properties of the electrode and the ceramic dielectric layer, improves the tensile strength of the electrode and the pin part, and improves the overall reliability of the capacitor.

The application discloses a ladle slag line brick for smelting high-alloy steel, which comprises main raw materials and auxiliary materials, wherein the main raw materials comprise 55-70% of fused large-crystal magnesia material, 5-15% of fused zircon spinel material, 0.5-1% of calcium aluminate material, 5-15% of fused barium zirconate material, 12-17% of high-purity graphite material and 1-3% of antioxidant, and the auxiliary material is a phenolic resin binder, and the phenolic resin binder accounts for 2-4% of the mass of the main raw materials; the particle size range of the fused large-crystal magnesia material is 8-0.5 mm, the particle size range of the fused zircon spinel material is 0.5-0.1 mm, and the particle size range of the fused barium zirconate material is 0.1-0.045 mm. The reaction between magnesia and carbon in the slag line brick is reduced, the compact structure of the slag line brick is retained, and the service life is increased by more than 30% compared with that of the magnesia-carbon brick.

The invention discloses a flexible barium zirconate photoelectric film and a preparation method and application thereof. The preparation method of the flexible barium zirconate photoelectric film comprises the following steps: preparing a water-soluble strontium aluminate sacrificial layer on a substrate; depositing barium zirconate on the water-soluble strontium aluminate sacrificial layer by adopting a sol-gel method or a radio frequency magnetron sputtering method to obtain a barium zirconate film grown on the sacrificial layer; and immersing the barium zirconate film grown on the sacrificial layer and the flexible substrate into water, and transferring the barium zirconate film to the flexible substrate after the sacrificial layer is dissolved to obtain the flexible barium zirconate photoelectric film. Water-soluble strontium aluminate is used as a sacrificial layer, the BZO film is prepared by a sol-gel method or a radio frequency magnetron sputtering method, and the obtained BZO film has good photoelectric properties, crystallinity and thermal stability and is suitable for being applied to high-performance photoelectric devices.

The invention provides a solid electrolyte, a preparation method thereof and a battery. The solid electrolyte takes double rare earth doped barium zirconate as a main phase and aluminum oxide as a second phase, the double rare earth doping elements are yttrium element and ytterbium element. Through the synergistic effect of a double-rare-earth doping mechanism and a second-phase pinning effect, the solid electrolyte has relatively good conductivity, the mechanical stability and the thermal stability of the solid electrolyte are also improved, and the thermal mechanical stability of the solid electrolyte is favorably improved.

This invention belongs to the field of printed circuit board manufacturing, specifically relating to a nano-graphite shadowing reagent for FPCs and its preparation method. The reagent is prepared by first synthesizing cerium-doped yttrium molybdate complexed nanocages and sulfonic acid-functionalized silica-coated barium zirconate core-shell nanoparticles. The former forms a hollow cage structure via a hydrothermal method guided by sodium citrate; the latter forms a core-shell structure through co-precipitation, calcination, and sol-gel methods, and is ultimately oxidized and grafted with sulfonic acid groups. In preparing the shadowing reagent, a premixed solution containing barium zirconate core-shell particles is dispersed with nano-graphite, and then a yttrium molybdate nanocage suspension is introduced. Under alkaline heating conditions, both particles bind to the graphite sheets through electrostatic and coordination interactions, constructing a stable three-dimensional inorganic network. This method significantly improves the reagent's dispersion stability, adhesion to pore walls, and uniform coverage of high aspect ratio micropores, ultimately forming a high-performance conductive colloid suitable for high-reliability via metallization processes in flexible circuit boards.

The invention discloses a preparation method and application of a BaZrO3 material with adjustable piezoelectric property. The preparation method comprises the following steps: (1) mixing a zirconium salt precursor solution and a barium salt precursor solution, and dropwise adding the mixture into an alkali solution to form colloid; (2) carrying out hydrothermal reaction on the colloid, filtering, washing and drying to obtain BaZrO3 powder; and (3) grinding and mixing the BaZrO3 powder and a reducing agent, carrying out heat treatment for 0.5-10 hours in an inert atmosphere, cooling, washing and drying to obtain the catalyst. The high symmetry of a BaZrO3 crystal structure is broken by regulating and controlling the mass ratio of BaZrO3 to the reducing agent, so that accurate regulation and control of the piezoelectric property of barium zirconate are realized. The BaZrO3 material with the adjustable piezoelectric property has a wide application prospect in the field of implantable or close-contact medical equipment, the field of conversion of signals such as vibration, noise or pressure into electric energy, and many fields such as synthesis ammonia and hydrogen production by water decomposition related to piezoelectric catalysis.

A transmission line is disclosed which includes a first conductor, a second conductor, a composite disposed between the first conductor and the second conductor, the composite includes non-linear inclusions comprising one or more of non-linear dielectric and non-linear magnetic inclusions mixed in a matrix material, wherein the non-linear dielectric inclusions are selected from the group consisting of barium strontium titanate (BST), barium titanate, strontium titanate, barium zirconate titanate, lead zirconate titanate, lead titanate, lithium niobate, potassium niobate, lead scandium tantalate, strontium barium niobate, and combinations thereof, and the non-linear magnetic inclusions are selected from the group consisting of nickel zinc ferrite (NZF), manganese zinc ferrite, cobalt ferrite, manganese ferrite, zinc ferrite, nickel ferrite, and combinations thereof, wherein the non-linear inclusions by volume are about 25% NZF, about 10% BST / 15% NZF, and about 15% BST / 10% NZF, and wherein the first conductor, the second conductor, and the composite form a capacitor.

The invention discloses a novel rotary kiln ceramic lining for calcining a lithium battery positive electrode material and a preparation method of the novel rotary kiln ceramic lining, and relates to the field of new energy and ceramics. The ceramic lining takes at least one of calcium titanate, strontium titanate, barium titanate, calcium zirconate, strontium zirconate and barium zirconate as a main body material, and is prepared from at least one of calcium oxide, strontium oxide, barium oxide or a precursor thereof, and zirconium dioxide or titanium dioxide. The preparation method comprises the following steps: mixing the raw materials and the binder, drying, crushing and sieving; performing compression molding on the materials; calcining the green body to directly obtain the ceramic lining or calcining the green body to obtain a pre-sintered material, and preparing the ceramic lining from the pre-sintered material. The ceramic lining prepared by the invention has extremely low porosity, and can effectively prevent the positive electrode material precursor from permeating into the ceramic lining. The ceramic lining is not easy to react with the positive electrode material, has excellent erosion resistance, and can be used as a rotary kiln lining for calcining the positive electrode material of the lithium battery.

The invention relates to the field of green special refractory ceramics, and particularly discloses an ultralow-carbon aluminum zirconium barium magnesium converter sliding plate and a preparation process thereof. The ultralow-carbon aluminum-zirconium-barium-magnesium converter sliding plate comprises the following raw material components in parts by weight: 60-80 parts of a main material; 1-3 parts of nano magnesium oxide; 4-8 parts of magnesium oxide; 20 to 30 parts of zirconium oxide; 1-4 parts of a sintering agent; 3-6 parts of a binding agent; the main materials comprise barium hexaaluminate and barium zirconate; the preparation method comprises the following steps: S1, mixing to obtain a mixture; and S2, the mixture is subjected to firing, oil immersion, baking and cold machining in the oxygen atmosphere, and the ultra-low-carbon aluminum zirconium barium magnesium converter sliding plate is obtained. The ultralow-carbon aluminum-zirconium-barium-magnesium converter sliding plate almost does not contain any carbon element, the oxidation resistance is excellent, the cleanliness of molten steel is effectively improved, and the thermal shock resistance and the crack propagation resistance of the ultralow-carbon aluminum-zirconium-barium-magnesium converter sliding plate are obviously improved through the synergistic effect of all the components.

The invention provides a mixed coated modified high-nickel ternary positive electrode material and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing a lithium source and a high-nickel precursor, and sintering in an atmosphere furnace to obtain a first sintered material; dispersing the primary sintering material, a barium source and a zirconium source in an alcohol solvent, stirring, and evaporating the alcohol solvent to dryness to obtain a modified precursor; and sintering the modified precursor in an atmosphere furnace to obtain the mixed coated modified high-nickel ternary positive electrode material. Wherein the feeding amount of the barium source is smaller than that of the zirconium source, and the mixed coating layer of the mixed coating type modified high-nickel ternary positive electrode material contains barium zirconate, lithium zirconate and zirconium dioxide. The process is simple and convenient, the amount of residual alkali on the surface of the material is reduced by utilizing special material selection and feeding amount design of a non-aqueous system, a barium source and a zirconium source, and barium zirconate, lithium zirconate and zirconium dioxide are coated on the surface of the positive electrode material, so that the ion transmission efficiency and the structural stability of the material are synergistically improved; and the interface side reaction when the material is in contact with sulfide electrolyte is reduced.

The invention belongs to the field of printed circuit board manufacturing, and particularly relates to a nano-graphite black shadow reagent for an FPC (flexible printed circuit) and a preparation method of the nano-graphite black shadow reagent, and the preparation method of the nano-graphite black shadow reagent comprises the following steps: firstly, synthesizing cerium-doped yttrium molybdate complex nanocages and sulfo-functionalized silicon dioxide coated nano barium zirconate core-shell particles; the hollow cage-shaped structure is formed by guiding sodium citrate through a hydrothermal method; and the latter forms a core-shell structure through coprecipitation, calcination and a sol-gel method, and is finally oxidized and grafted with sulfonic acid groups. When the black shadow reagent is prepared, a premixed solution containing barium zirconate core-shell particles and nano-graphite are dispersed, then yttrium molybdate nano-cage suspension liquid is introduced, and under the alkaline heating condition, the premixed solution and the nano-graphite are combined with a graphite sheet layer through electrostatic and coordination effects, so that a stable three-dimensional inorganic network is constructed. According to the method, the dispersion stability of the reagent, the binding force of the reagent and the hole wall and the covering uniformity of the reagent on the micropores with the high depth-diameter ratio are remarkably improved, the conductive colloid with excellent performance is finally formed, and the method is suitable for a high-reliability hole metallization process of a flexible circuit board.

The invention provides a high-performance high-voltage ceramic capacitor and a manufacturing process thereof, and relates to the technical field of electronic materials, and the capacitor comprises a ceramic dielectric layer and an electrode layer with an innovative structure. The ceramic dielectric layer is composed of barium titanate, barium zirconate, yttrium oxide and niobium pentoxide with specific purity and particle size distribution, and a nanoscale additive is introduced. The electrode layer realizes hierarchical alternate deposition of copper and nickel chromium at the scale of 10nm through magnetron sputtering, and is of a multi-layer gradient structure. The manufacturing process is accurately controlled and comprises the links of batching, ball-milling mixing, ultrasonic dispersion, forming, sintering, pulse annealing, performance testing and the like. By optimizing the materials and the process, the dielectric property, the voltage resistance, the conductivity and the corrosion resistance of the capacitor are remarkably improved, and the stable and consistent product quality is ensured. The performance test system is strict and comprehensive, can meet the strict requirements of modern electronic equipment, and has a wide application prospect in the field of electronics.

A proton-conducting solid oxide electrolyzer includes a first electrode configured to produce oxygen gas from steam, a second electrode configured to produce hydrogen gas from the steam, and a proton-conducting solid oxide electrolyte between the first electrode and the second electrode. The first electrode includes barium zirconate of formula BaZrO3−δ doped with at least one transition metal and substantially free of a rare earth element, wherein δ is an oxygen deficit, and wherein the at least one transition metal comprises cobalt. Also disclosed are an electrode for the proton-conducting solid oxide electrolyzer, and a method of producing hydrogen gas.

The invention provides a hot-state gunning mix for steel ladles and a preparation method thereof, and belongs to the technical field of oilfield chemical engineering, the preparation method comprises the following steps: step S1, immersing alumina fibers into a nano-zirconia suspension, and drying to obtain a composite material; adding boric acid into the silica sol, and uniformly stirring to obtain modified silica sol; s2, mixing and stirring magnesia and pretreated steel slag, adding pre-dispersed nano aluminum oxide, continuously stirring, adding barium zirconate, a composite material, anorthite powder, chromic oxide, borax, yttrium oxide and a water reducing agent, and stirring at normal temperature to obtain a mixed material; and S3, sequentially adding aluminum dihydrogen phosphate, the modified silica sol and a sulfonated lignin solution into the mixed material, uniformly mixing, and carrying out ultrasonic dispersion to obtain the hot gunning material for the steel ladle. The purposes of erosion resistance and good adhesiveness of the hot gunning mix for the steel ladle can be achieved.

The invention relates to the field of refractory materials, in particular to a ferromanganese erosion-resistant refractory material and a preparation method thereof, and solves the problems that the existing refractory material is eroded by ferromanganese for a long time, carbon element oxidation causes micropores in the refractory material, a melting point decline boundary layer of a reaction metamorphic layer is unstable, and the ferromanganese erosion surface grows into the refractory material; a working layer is composed of, by weight, 80-95 parts of ASC brick base materials, 2-7 parts of modified filling materials and 10-20 parts of interface isolation materials, the modified filling materials are barium zirconate or zirconium silicate, the modified materials are tantalum nitride, and the mass ratio of the filling materials to the tantalum nitride is (1-6): 1. The interface isolation material is composed of magnesium phosphate, aluminum phosphate and tungsten carbide, and the mass ratio of magnesium phosphate to aluminum phosphate to tungsten carbide is (4-6): (4-6): (8-12). According to the invention, the refractory material has extremely high ferromanganese tolerance, and the service life of the refractory material is greatly prolonged.

The invention provides a BaTiO3-coated PCPA / P (VDF-HFP) dielectric composite material with high energy storage performance and a preparation method of the BaTiO3-coated PCPA / P (VDF-HFP) dielectric composite material. According to the material, polyvinylidene fluoride-hexafluoropropylene (P (VDF-HFP)) is used as a polymer matrix, 0.5 wt%-5wt% of barium zirconate titanate and barium titanate nanofibers (BZT (at) BT (at) PCPA-nfs) are used as a filler, the interface bonding force between an inorganic filler and an organic matrix is improved through interface design, the dielectric difference between the inorganic filler and the organic matrix is made up, and the dielectric properties of the inorganic filler and the organic matrix are improved. The dielectric property and the energy storage property of the composite material are improved. The dielectric constant of the prepared 2wt% BaTiO3-coated PCPA / P (VDF-HFP) dielectric composite material reaches 12.0, and the highest polarization intensity reaches 13.4 [mu] C / cm < 2 >. And the energy storage density under the electric field of 5874kV / cm reaches 33.8 J / cm < 3 >, and the energy storage efficiency is 82.6%. According to the BaTiO3-coated PCPA / P (VDF-HFP) dielectric composite material provided by the invention, high energy storage density, high efficiency and good cycling stability and frequency stability are simultaneously realized in a medium electric field for the first time, and the BaTiO3-coated PCPA / P (VDF-HFP) dielectric composite material has important commercial application prospects in the fields of energy storage equipment, power electronics and the like.

The present invention provides a hot gunning material for a ladle and a preparation method thereof, belonging to the field of oilfield chemical technology. The method comprises the following steps: Step S1: immersing alumina fibers in a nano-zirconia suspension of a certain concentration and drying to obtain a composite material; adding boric acid to the silica sol and stirring uniformly to obtain a modified silica sol; Step S2: mixing magnesia and pretreated steel slag, adding pre-dispersed nano-alumina, continuing stirring, then adding barium zirconate, the composite material, calcium feldspar powder, chromium oxide, borax, yttrium oxide, and a water reducer, stirring at room temperature to obtain a mixed material; Step S3: sequentially adding aluminum dihydrogen phosphate, the modified silica sol, and a sulfonated lignin solution to the mixed material, mixing uniformly, and ultrasonically dispersing to obtain a hot gunning material for a ladle. The present invention can achieve the purpose of a hot gunning material for a ladle having corrosion resistance and good adhesion.

To provide a resin composition for circuit board formation from which a cured product that is excellent in moldability and in a high dielectric constant can be obtained.SOLUTION: A resin composition for circuit board formation contains (A) a high dielectric filler, and (B) a thermosetting resin, wherein (A) the high dielectric filler is one or two or more kinds selected from the group consisting of barium titanate, calcium titanate, storontium titanate, magnesium titanate, bismuth titanate, zirconium titanate, zinc titanate, magnesium zirconate, strontium zirconate, barium zirconate, calcium titanate zirconate, lead zirconate titanate, barium niobate magnesium, and calcium zirconate, and (B) the thermosetting resin is one or two or more kinds selected from the group consisting of an epoxy resin, a benzoxazine resin, a cyanate resin, a BT resin, a bismaleimide resin, a phenol resin, a polyimide resin, a melamine resin and an acrylic resin.SELECTED DRAWING: None

This application discloses a method for preparing a liquid crystal polymer composite film and the liquid crystal polymer composite film itself. The preparation method includes: dissolving soluble liquid crystal polymer particles in a first solvent and stirring to obtain a soluble liquid crystal polymer solution; mixing the soluble liquid crystal polymer solution, filler micropowder, and additives to obtain a first mixture; dispersing and degassing the first mixture to obtain a slurry; the filler micropowder includes at least one of titanium dioxide, barium titanate, barium zirconate, lead titanate, calcium zirconate, calcium titanate, carbon nanotubes, graphene oxide, and reduced graphene; coating the slurry onto a substrate to form a wet film on the substrate; drying and curing the wet film to obtain a first film; and peeling the first film off the substrate to obtain the liquid crystal polymer composite film. In this application, the filler micropowder and the liquid crystal polymer matrix work synergistically to achieve a high dielectric constant while maintaining low loss. It is also less prone to breakage or deformation under external forces.

The invention discloses manganese-doped barium zirconate nanocrystals and preparation thereof. The preparation method comprises the following steps: preparing an aqueous solution containing Ba < 2 + >, Zr < 4 + >, Mn < 2 + >, OH-1 and glycerol; performing oil bath heating reaction on the aqueous solution to obtain a mixture; and performing constant-temperature closed heating on the obtained mixture, and performing centrifugal separation to obtain a crystal grain product. The method is simple in process, mild in condition and suitable for industrial large-scale production, and the prepared manganese-doped barium zirconate nanocrystal has high dielectric constant and excellent dispersing performance.

The present invention relates to an electrostatic chuck with high dielectric constant and high breakdown strength and a preparation method thereof. The electrostatic chuck comprises a ceramic dielectric layer, an adhesive layer and a metal base which are arranged in sequence from top to bottom. The ceramic dielectric layer comprises at least one ceramic dielectric layer. The raw materials of the ceramic dielectric layer include at least one of alumina and aluminum nitride, and at least one of barium titanate, barium zirconate titanate, lead magnesium niobate and barium strontium titanate. The electrostatic chuck utilizes electrostatic adsorption technology to achieve efficient electrostatic adsorption through the ceramic dielectric layer material with high dielectric constant. The high dielectric constant material can effectively store charges, thereby enhancing the electrostatic adsorption force, enabling workpieces such as wafers to maintain better stability and precision during the processing. Moreover, the ceramic dielectric layer material has high breakdown strength, which is beneficial to ensuring the safety of the electrostatic chuck when working in a high-voltage environment. The preparation method is convenient to control and has high production efficiency, which is beneficial to large-scale production.

The invention discloses a flexible inverse pyroelectric film and a preparation process thereof, the flexible inverse pyroelectric film comprises an inorganic nanometer filler and an organic polymer, the inorganic nanometer filler is PBZ lead barium zirconate nanofiber, the organic polymer is a PVDF flexible substrate, the chemical formula of the PBZ lead barium zirconate nanofiber is Pb < 1-x > Ba < x > ZrO < 3 >, and X is 0.2. The composite material has the advantages that the breakdown field strength can be increased, meanwhile, the dielectric constant of the composite material is improved, the composite material can be conveniently processed into various shapes due to the soft characteristic of the composite material, and integrated inverse pyroelectric material refrigeration can be further achieved easily.

A piezoelectric ceramic of the present disclosure contains, in potassium sodium niobate, at least one selected from the group consisting of strontium zirconate, barium zirconate, strontium titanate, and barium titanate. A piezoelectric element of the present disclosure includes a pair of electrodes on one surface of the piezoelectric ceramic and on the other surface located opposite to the one surface.

The invention belongs to the field of cleaning agents, and relates to a preparation method of an electric power facility surface cleaning agent, the electric power facility surface cleaning agent comprises the following raw materials in parts by mass: triglycidyl isocyanurate, octadecylamine polyoxyethylene ether, ammonium fluosilicate, acrylic resin and sodium hexadecyl sulfate, and the above raw materials are a group A raw material; the water-based acrylic emulsion, the fluorine-containing butyl acrylate, the carbon fiber powder, the barium zirconate, the oxalic acid polyester, the vinyl benzene and the nano calcium carbonate are used as the raw materials of the group B; the group C raw materials comprise a silane coupling agent, polydimethylsiloxane, polyamide resin, soap grains and citric acid; respectively mixing the raw materials to respectively obtain a mixture A, a mixture B and a mixture C; the cleaning agent is the electric power facility surface cleaning agent. According to the preparation method of the electric power facility surface cleaning agent, the cleaning agent which is better in anti-skid effect and higher in withstand voltage can be obtained; the invention further provides a using method of the electric power facility surface cleaning agent.

The invention relates to a chip type composite bending driver and a preparation process thereof, and relates to the technical field of drivers, and the preparation process comprises the following steps: S1, preparing lead barium zirconate nanofibers; s2, introducing the lead barium zirconate nanofibers obtained in the step S1 into a polyvinylidene fluoride substrate to prepare a composite solution; s3, the shape memory alloy sheet is subjected to aging training to form a memory bending shape; s4, shape memory alloy sheets meeting the shape requirement are selected; s5, enabling the composite solution prepared in the step S2 to form a composite film layer on the shape memory alloy sheet meeting the shape requirement in the step S4; s6, forming a surface electrode layer on the composite film layer; and S7, the side, away from the composite thin film layer, of the shape memory alloy sheet and the side, away from the composite thin film layer, of the surface electrode layer are connected with outer guide wires, and the sheet type composite driver is obtained. The application has the effect of reducing the response time of the driver.