53 results about "Lanthanum zirconate" patented technology

The invention belongs to the technical field of solid-state battery materials, and discloses an inorganic solid-state electrolyte lanthanum lithium zirconate surface interface non-metallic element doped modified material using a plasma technology and a preparation method and application thereof, which can reduce the interface impedance of an electrolyte and improve the electrochemical performance of the electrolyte. By using the plasma technology, impurities such as lithium carbonate and the like on the surface of the inorganic solid electrolyte lanthanum lithium zirconate can be etched, a lithium-loving protective layer can be generated in situ on a surface interface, and the air stability of the electrolyte block is improved. According to the invention, multi-aspect modification can be realized by combining a plasma technology with a plurality of non-metallic element excitation sources, corresponding gain protection layers can be formed according to different requirements, and performance exertion of the battery in different fields is facilitated. When the inorganic solid electrolyte lanthanum lithium zirconate modified material obtained by the method disclosed by the invention is in contact with lithium metal to form a battery, the inorganic solid electrolyte lanthanum lithium zirconate modified material shows relatively low interface contact resistance and excellent cycling stability, and has a good application value.

The invention relates to plasticity-enhanced lead lanthanum zirconium tin titanate-based antiferroelectric ceramic and a preparation method thereof. The chemical formula of the zirconium tin lead titanate lanthanum-based anti-ferroelectric ceramic is (Pb < 0.975-x > La < 0.02 > Sr < x >) (Zr < 0.5 > Sn < 0.37 > Ti < 0.13 >) < 0.9975 > O < 3 >, x is smaller than or equal to 0.10; and sintering by adopting a flash sintering technology to prepare the plasticity-enhanced lead lanthanum zirconate tin titanate-based antiferroelectric ceramic. Wherein the initial electric field intensity is set to be 100-300 V / cm, and the temperature rise rate of the flash sintering furnace body is 5-15 DEG C / min; when the reading of the current detector reaches the order of magnitude of [mu] A, the electric field intensity is increased to 200-500V / cm; after the current density value reaches 10-30 mA / mm < 2 >, the stable current density is kept for 90-200 s; preferably, the temperature rise rate of the flash burning furnace body is 8-12 DEG C / min.

The invention relates to the technical field of lithium ion batteries, in particular to a diaphragm material for a lithium battery and a preparation method of the diaphragm material. Comprising a base film and a modified nano TiO2 coating, the modified nano TiO2 coating is arranged on at least one side surface of the base film, and the modified nano TiO2 coating comprises the following raw materials in parts by weight: 55-80 parts of a modified nano TiO2 composite material, 8-24 parts of a binder and 2.5-7.5 parts of a dispersant; the modified nano TiO2 composite material is prepared by taking cellulose nanocrystals, lanthanum zirconate and rare earth praseodymium as modifiers and nano TiO2 as a raw material, the mass ratio of the cellulose nanocrystal to the lanthanum zirconate to the rare earth praseodymium is (1-5): (2-3): 1. By adding the modified nano TiO2 composite material and introducing nano particles into the diaphragm, a three-dimensional network structure is formed, the liquid absorption property and the ionic conductivity of the diaphragm are improved, and meanwhile, the diaphragm is high in air permeability and relatively good in mechanical property and ionic conductivity.

The invention discloses a flexible lanthanum zirconate-alumina fiber membrane as well as a preparation method and application thereof, and belongs to the technical field of inorganic nonmetal ceramic fiber materials. The preparation method comprises the following steps: dissolving zirconium oxychloride octahydrate, lanthanum chloride heptahydrate and aluminum chloride hexahydrate into absolute methanol, sequentially adding acetylacetone and triethylamine, stirring, and drying under reduced pressure to obtain a zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride; soaking the zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride in acetone, standing, filtering, concentrating under reduced pressure, and drying to obtain a zirconium-lanthanum-aluminum acetylacetone polymer precursor; the preparation method comprises the following steps: preparing a spinning solution from a zirconium-lanthanum-aluminum acetylacetone polymer precursor, absolute methanol serving as a solvent and polyoxyethylene serving as a spinning aid, and carrying out electrostatic spinning on the spinning solution to obtain a lanthanum zirconate-aluminum oxide precursor fiber membrane; and performing heat treatment on the lanthanum zirconate-aluminum oxide precursor fiber membrane to obtain the flexible lanthanum zirconate-aluminum oxide fiber membrane. According to the preparation method, acetylacetone is added into zirconium oxychloride, lanthanum chloride and aluminum chloride for coordination to form a linear zirconium-lanthanum-aluminum acetylacetone polymer, so that the technical problem that lanthanum zirconate long fibers with high strength and good flexibility are difficult to obtain is solved.

The invention belongs to the technical field of preparation of inorganic fiber materials, and provides a preparation method of hollow oxide fibers with reinforced inner walls. Through a coaxial electrostatic spinning method, precursors of a strengthening phase are introduced into an inner-layer spinning solution, and the precursors are promoted to be converted into strengthening materials through high-temperature treatment, so that a strengthening structure is formed in the hollow fiber, and the mechanical performance of the fiber is effectively improved. The prepared various hollow oxide fibers including zirconium oxide, titanium oxide, yttrium oxide, lanthanum zirconate and cerium titanate all show good morphological characteristics, and have excellent flexibility and high strength at the same time. The novel hollow oxide fiber has wide application prospects in multiple fields of heat preservation and heat insulation, electromagnetic wave absorption, sound absorption and noise reduction, high-temperature filtration and the like.

The invention discloses a lanthanum zirconate doped aerogel composite material and a preparation method thereof. The preparation method comprises the following six steps: preparation of zirconium-lanthanum sol, modification of fibers with lanthanum zirconate aerogel, preparation of a porous preform, sol impregnation and aging, supercritical drying and high-temperature sintering. The lanthanum zirconate doped aerogel composite material prepared by the method has the characteristics of high temperature resistance, low thermal conductivity, high toughness, capability of forming large-size complex components and the like, the maximum size can reach 1500mm in length, 800mm in width and 100mm in thickness, and the lanthanum zirconate doped aerogel composite material can be used as a high-temperature thermal insulation material in the fields of aerospace, nuclear power, industrial high-temperature furnaces and the like.

The invention discloses an inorganic solid electrolyte ceramic material containing oxygen vacancies and a preparation method thereof, and belongs to the technical field of lithium ion batteries. Tantalum-doped lithium lanthanum zirconate (LLZTO) solid electrolyte powder with a garnet type cubic phase structure is prepared through a solid phase method, the LLZTO fine powder obtained through grinding is subjected to annealing treatment in a reducing atmosphere to obtain LLZTO fine powder containing oxygen vacancies, the powder is subjected to cold press molding after being subjected to ball milling and drying, and the electrolyte sheet containing the oxygen vacancies is obtained through high-temperature sintering in the reducing atmosphere. According to the present invention, the Ta-doped LLZO is synthesized, the lattice of the prepared solid electrolyte contains the oxygen vacancy through the two-time reduction, the oxygen vacancy defect can reduce the activation energy of the lithium ion transmitted along the crystal grain and the crystal boundary, and the rapid migration of the lithium ion on the surface of the electrolyte is promoted so as to improve the ionic conductivity of the electrolyte sheet.

This invention belongs to the field of polymer materials, specifically relating to a low-heat-shrinkage polymeric film for laser drilling and its preparation method. The film comprises modified polyphenylene ether resin, vinyl-containing benzoxazine resin, a specific cationic initiator, a toughening agent, and inorganic modified fillers: gadolinium lanthanum zirconate core-shell nanocrystals and lithium aluminum borosilicate nanowires. The preparation method includes: first, surface-treating the two inorganic fillers with a silane coupling agent and then dispersing them in a solvent to obtain a slurry; then, mixing this slurry with the modified polyphenylene ether resin, vinyl-containing benzoxazine resin, cationic initiator, and toughening agent to form a homogeneous adhesive; finally, coating the adhesive onto a carrier film and drying and curing it at three temperature stages from low to high to obtain the finished film. The film prepared by this method exhibits extremely low heat shrinkage during laser drilling, effectively controlling resin protrusion or indentation defects on the hole wall, and significantly improving the quality and reliability of micropore processing.

This invention provides a method for recycling positive electrode materials in batteries, comprising the following steps: separating the positive electrode sheet to obtain a positive electrode current collector and positive electrode active layer powder, wherein the positive electrode active layer powder includes lithium iron phosphate and lithium lanthanum zirconium oxide electrolyte; performing lithium-ion leaching treatment on the positive electrode active layer powder using citric acid to obtain a lithium-containing solution and positive electrode active layer residue; performing iron-phosphorus leaching treatment on the positive electrode active layer residue using sulfuric acid to obtain an iron-phosphorus mixed solution and lanthanum zirconate residue; subjecting the iron-phosphorus mixed solution to a hydrothermal reaction to obtain iron(III) oxide; and performing alkaline dissolution treatment on the lanthanum zirconate residue with sodium hydroxide to obtain NaLaO2 and Na2ZrO3. The recycling method of this invention can efficiently recover lithium, iron, phosphorus, zirconium, and lanthanum elements from the positive electrode material in batteries, and has the characteristics of low cost and environmental friendliness.

The utility model relates to the technical field of lanthanum zirconate preparation, and discloses a lanthanum zirconate preparation device with a heat insulation function, which comprises a fixed outer frame, the inner side of the fixed outer frame is fixedly connected with a mixing bin, the top of the mixing bin is fixedly connected with a fixed frame, the middle part of the fixed frame is fixedly connected with a double-head motor, and the double-head motor is fixedly connected with a heat insulation device. One output end of the double-end motor is fixedly connected with a stirring rod, the outer wall of the stirring rod is fixedly connected with stirring blades, the inner wall of the mixing bin is fixedly connected with auxiliary blades, and the top of the mixing bin is provided with a heating assembly. According to the utility model, the problems of non-uniform heat distribution, limited temperature control precision, difficulty in effectively preventing heat loss and limitation on stirring and heating function optimization space of the device are solved, efficient and uniform heating is achieved, local over-burning or under-burning is avoided, heat loss can be avoided due to efficient sealing and heat insulation, and the service life of the device is prolonged. And the lanthanum zirconate powder is more stable in crystal phase and higher in purity.

The invention provides a production method of lanthanum zirconate, and belongs to the technical field of inorganic non-metallic materials. According to the invention, an electric smelting method is adopted, during high-temperature smelting, a zirconia material and lanthanum oxide / lanthanum carbonate are fully subjected to a high-temperature liquid phase chemical reaction at high temperature, an all-La2Zr2O7-phase electric smelting lanthanum zirconate product can be obtained, and the all-La2Zr2O7-phase electric smelting lanthanum zirconate product can be processed into particle size sand and fine powder with various particle sizes or can be processed into crushing and grading powder for a high-temperature thermal barrier coating material according to the requirements of users. Compared with a La2Zr2O7 material prepared by a solid-phase reaction method, a precipitation method, a sol-gel method, a self-propagating combustion method, a hydrothermal synthesis method and the like, the lanthanum zirconate prepared by the method provided by the invention is high in volume density and low in porosity, can be processed into particles and fine powder / graded powder with various particle size levels, is good in high-temperature volume stability, and can be used for preparing the lanthanum zirconate material. As an electric melting material, the material has the characteristics of small reheating shrinkage and small high-temperature creep deformation.

Synthesizing lithium lanthanum zirconate includes combining a reagent composition with a salt composition to yield a molten salt reaction medium, wherein the reagent composition comprises a lithium component, a lanthanum component, and zirconium component having a lithium:lanthanum:zirconium molar ratio of about 7:3:2; heating the molten salt reaction medium to yield a reaction product; and washing the reaction product to yield a crystalline powder comprising lithium lanthanum zirconate.

A gas sensor element (10, 10a, 10b) with: a solid electrolyte element (11) extending in an axial direction and containing ZrO2 with oxygen ion conductivity; an external electrode (100) which is provided on one of the surfaces of the element made of solid electrolyte (11) and comes into contact with a gas to be measured; and an internal electrode (200) which is provided on an opposite surface of the solid electrolyte element (11) and comes into contact with a reference gas, wherein the inner electrode (200) has an inner sensing electrode region (220, 220a, 220b) arranged on a front end face in the axial direction and sensing a specific gas contained in the gas to be measured, and an inner connection region (210) arranged behind the inner sensing electrode region (220, 220a, 220b), connected to the inner sensing electrode region (220, 220a, 220b), and in contact with a connection port (70) for external output, wherein the inner electrode (200) has an electrically conductive oxide layer (OCL1, OCL1b, OCL2, OCL2b) the main component of which is a perovskite phase composed according to a composition formula with La a M b Ni c O x is represented (where M is an element in the form of Co and / or Fe, a + b + c = 1, 1.25 ≤ x ≤ 1.75), has a perovskite-like crystal structure; the coefficients a, b and c satisfy 0.459 ≤ a ≤ 0.535, 0.200 ≤ b ≤ 0.475 and 0.025 ≤ c ≤ 0.350; the internal connection area (210) has a lanthanum zirconate layer (LZL) between the electrically conductive oxide layer (OCL1, OCL1b, OCL2, OCL2b) and the solid electrolyte element (11); and the internal detection electrode region (220, 220a, 220b) is designed such that (i) no lanthanum zirconate layer (LZL) is formed between the electrically conductive oxide layer (OCL1, OCL1b, OCL2, OCL2b) and the solid electrolyte element (11), or (ii) a lanthanum zirconate layer (ZLZ) formed between the electrically conductive oxide layer (OCL1, OCL1b, OCL2, OCL2b) and the solid electrolyte element (11) is thinner than the lanthanum zirconate layer (LZL) of the internal connection region (210).

The application provides a preparation method of silica-stabilized lanthanum zirconate aerogel, and comprises the following steps: using lanthanum nitrate hexahydrate and zirconium nitrate pentahydrate as precursors, and using propylene oxide as a catalyst to obtain an LZ sol in anhydrous ethanol solvent; using tetraethyl orthosilicate as a precursor, and using hydrochloric acid as a catalyst to carry out hydrolysis in an ethanol and water solvent to obtain an SiO2 sol; dropping the obtained SiO2 sol into the LZ sol drop by drop to obtain a mixed solution, and dropping the mixed solution into propylene oxide gel promoter drop by drop to obtain an LZS sol; the LZS sol is placed in an oven to obtain an LZS gel; and the LZS gel is subjected to aging and supercritical drying to obtain a blocky LZS aerogel. The silica-stabilized lanthanum zirconate aerogel has a unique pyrochlore structure and good thermal stability, and has a very large application prospect in the field of heat preservation and insulation.

The present application relates to the technical field of paint, especially to a kind of low thermal conductivity, high emissivity infrared radiation paint and its preparation method and coating.The paint includes the following mass parts of raw materials: deionized water 40-60 parts, modified lanthanum zirconate powder 25-45 parts, chromium oxide powder 2.5-7.5 parts, lanthanum oxide powder 2.5-7.5, thickening agent 2-4 parts, dispersing agent 0.3-0.7 parts, defoaming agent 0.1-0.3 parts, curing agent 0.2-0.5 parts, film-forming aid 0.5-2 parts;The preparation method of the paint is to add thickening agent to deionized water according to the proportion, stir to get a uniform viscous slurry liquid, add dispersing agent, defoaming agent, curing agent, film-forming aid, modified lanthanum zirconate powder, chromium oxide powder and lanthanum oxide powder to the liquid in turn, stir and disperse, to get infrared radiation paint.The present application has the advantages of low thermal conductivity and high emissivity at the same time, with high infrared emissivity in 0.8-25 μm wave band, and good heat exchange effect.

The application provides a superfine lanthanum zirconate powder and a preparation method thereof, and belongs to the technical field of powder preparation. Soluble zirconium salt, soluble lanthanum salt and water are mixed to obtain a lanthanum zirconate solution; the lanthanum zirconate solution and a precipitant are added into a polyacrylic acid solution to perform a precipitation reaction, so as to obtain a precipitate; the precipitate is sequentially subjected to washing and calcination, so as to obtain the superfine lanthanum zirconate powder; the pH value of a washing liquid used in the washing is 8-8.5; and the temperature of the calcination is 1000-1200 DEG C. In the application, PAA is added as a dispersant to inhibit grain agglomeration; the lanthanum zirconate solution and the precipitant are added into the polyacrylic acid solution to perform the precipitation reaction; the pH value of the washing liquid is limited; and the temperature of the calcination is limited, so that the superfine nanometer lanthanum zirconate powder is prepared, the particle size is small, and the powder does not agglomerate.

The invention relates to a lithium-supplementing purification method of an oxide solid electrolyte. The lithium supplement purification method of the oxide solid electrolyte comprises the following steps: (1) taking a proper amount of lithium lanthanum zirconium oxide powder containing lanthanum zirconate impurities, placing the powder in a sulfuric acid solution, dissociating at 20-80 DEG C, centrifuging, drying, weighing, and calculating the mass fraction of the lanthanum zirconate impurities in the lithium lanthanum zirconium oxide powder; and (2) adding a lithium source into the lithium lanthanum zirconium oxide powder containing the lanthanum zirconate impurity according to the mass fraction of the lanthanum zirconate impurity and the stoichiometric ratio of the LLZO, and sintering to obtain the pure-phase lithium lanthanum zirconium oxide solid electrolyte powder.

The invention belongs to the technical field of aero-engine thermal barrier coatings, and relates to a europium-praseodymium dual-modified lanthanum zirconate thermal barrier coating material and a preparation method thereof, and the preparation method comprises the steps of thermal barrier coating material preparation and thermal barrier coating preparation. The molecular formula of the europium and praseodymium dual-modified lanthanum zirconate thermal barrier coating material is (La (1-x) Eux) 2 (Zr (1-y) Pry) 2O7, x is equal to 0.05-0.3, and y is equal to 0.1-0.5; deposition process parameters are selected, wherein the beam intensity of electron beams is 1.7-2.1 A; the temperature of the sample is 950-1050 DEG C; the evaporation time is 40 to 80 minutes; and the evaporation time is controlled, and finally the europium-praseodymium dual-modified lanthanum zirconate thermal barrier coating is obtained on the rotating sample. The thermal expansion coefficient of the thermal barrier coating material is close to that of YSZ, the thermal barrier coating material has low thermal conductivity, meanwhile, the europium-praseodymium double-modified lanthanum zirconate thermal barrier coating is prepared through the electron beam physical vapor deposition technology, and the europium-praseodymium double-modified lanthanum zirconate thermal barrier coating has a columnar crystal structure and is long in service life; the thermal conductivity of the coating can be reduced, the service temperature of the coating can be increased, and the actual problem that the service life of the coating is short can be solved.

The application provides a method for improving sintering quality of lithium battery positive electrode material by using an insulating refractory, and the method comprises the following steps: forming an insulating material by using a cerium-doped lanthanum zirconate solid solution and a high-temperature binder, spraying the insulating material on the surface of the kiln wall and the kiln roof refractory of a sintering kiln to obtain a sintering kiln with the insulating refractory; compared with a conventional sintering kiln, the sintering kiln with the insulating refractory can isolate the pollution of metal ions in the refractory to the positive electrode material, and can also isolate the erosion and corrosion of the alkaline compound of the positive electrode material to the refractory, so that the qualified rate of the sintered positive electrode material is increased by more than 10%, the energy saving of per ton of positive electrode material is more than 15%, and the service life of the sintering kiln is increased by more than one time. The insulating material is applied to the sintering kiln for the lithium battery positive electrode material, and the bottleneck problem that has plagued the sintering of the positive electrode material is solved.

This application discloses a solid electrolyte, its preparation method, a positive electrode active material, and a battery. The solid electrolyte includes: a substrate comprising lithium lanthanum zirconate doped with metal elements; a coating layer covering the surface of the substrate, comprising a composite metal phosphate; and a titration of the filtrate of an aqueous dispersion of the solid electrolyte with 0.1 mol / L HCl, wherein the average titration curve slope k in the pH range of 6.0 to 7.6 satisfies: -2 ≤ k ≤ -1. This indicates a strong interfacial bond between the coating layer and the substrate, which is beneficial for improving the ionic conductivity and interfacial stability of the solid electrolyte. When the average titration curve slope k is within the range defined in this application, it indicates that the coating layer on the substrate surface has a dense, uniformly distributed, and moderately thick structure, effectively physically isolating the lithium lattice inside the solid electrolyte from contact with water, suppressing side reactions, and exhibiting better ionic conductivity and air stability, which is beneficial for improving the cycle stability and rate performance of batteries using this solid electrolyte.

The invention discloses high-dispersity lanthanum zirconate nano-powder with a pyrochlore structure and a preparation method of the high-dispersity lanthanum zirconate nano-powder, and belongs to the technical field of lanthanum zirconate nano-powder. The preparation method comprises the following steps: (1) dissolving soluble zircon salt, tartaric acid and a surfactant in a mixed solvent I, and adjusting the solution to be neutral to obtain a solution A; dissolving soluble lanthanum salt and a surfactant in a mixed solvent II to obtain an emulsion B; (2) carrying out mixed reaction on the solution A and the emulsion B, washing and filtering to obtain a precursor; and (3) calcining the precursor to obtain the high-dispersity lanthanum zirconate nano-powder with the pyrochlore structure. The lanthanum zirconate nano-powder is synthesized in one step by adopting a chemical coprecipitation method, and the synthesized lanthanum zirconate nano-powder is of a pyrochlore structure and has the characteristics of high dispersity and small particles (50-100nm). The preparation method is simple and controllable in process, simple in required equipment, low in requirement, low in reaction temperature, low in preparation cost and easy for large-scale industrial production.

The invention relates to a preparation method of quartz fibers, in particular to a preparation method of quartz fibers with a lanthanum zirconate microcosmic refractory coating. The invention aims to solve the technical problems that the existing method for increasing the use temperature of the quartz fiber is complicated in process, other properties are reduced, and foreign ions are introduced. Lanthanum zirconate with excellent performance is selected as a coating component, the lanthanum zirconate microcosmic refractory coating is prepared on the fiber surface for the first time, and the coating has good high-temperature stability and can provide protection for a fiber base material at the ultrahigh temperature; the introduction of the low-thermal-conductivity component lanthanum zirconate can reduce the high-temperature thermal conductivity of the material. The lanthanum zirconate sol with good uniformity can be prepared only through water bath heating, and the uniformity of the coating is facilitated. The process for preparing the coating through a sol impregnation method is simplified, and meanwhile the impregnation effect is improved. The lanthanum zirconate microcosmic refractory coating is prepared on the surface of the quartz fiber, so that the use temperature of the quartz fiber is increased, and the heat conductivity of the quartz fiber material is reduced.

The invention belongs to the technical field of solar cells, and particularly discloses a silicon carbide target material and a preparation method and application thereof in the photovoltaic field. Silicon carbide, carbon powder and silicon powder are mixed, the carbon powder and the silicon powder can serve as active agents to effectively improve activity, then paraffin, a coupling agent and fullerene are mixed, and the silicon carbide target material is prepared. Lanthanum zirconate and polyvinylpyrrolidone are mixed and then blended, so that the material with excellent photoelectric property and high-temperature stability is obtained, the photoelectric conversion efficiency and stability can be greatly improved, and the development of a solar power generation technology is promoted.

The present invention relates to the technical field of ceramic coatings, and specifically discloses a wear-resistant composite ceramic coating for bearings and a preparation method thereof. The raw materials of the wear-resistant composite ceramic coating for bearings include by mass: 40-60 parts of composite smelting material, 1-3 parts of nanographene, 1-3 parts of titanium powder, 1-2 parts of yttrium oxide, 0.1-1 parts of organic binder, 1-3 parts of chromium nitrate, 1-3 parts of aluminum nitrate, 0.1-0.2 parts of lanthanum zirconate, and 1-3 parts of tetraethyl orthosilicate; the raw materials of composite smelting material include by mass percentage: 20-30% nickel, 1-2% borax, 1-3% silicon powder, 1-2% cobalt powder, 1-2% carbon powder, and the balance is iron powder. After the rough machining of the inner ring spherical surface of the bearing of the present invention is completed, a layer of ceramic coating is formed on its surface, which not only improves the working hardness and wear resistance of the bearing, significantly reduces the friction coefficient, but also has excellent corrosion resistance, and can meet the long-term use requirements of many industries.

The application discloses a pyrochlore-structure high-dispersity lanthanum zirconate nanopowder and a preparation method thereof, and belongs to the technical field of lanthanum zirconate nanopowder. The preparation method comprises the following steps: (1) dissolving soluble zirconium salt, tartaric acid and a surfactant in mixed solvent I, adjusting the solution to be neutral to obtain solution A; dissolving soluble lanthanum salt and a surfactant in mixed solvent II to obtain emulsion B; (2) mixing solution A and emulsion B to carry out a mixing reaction, and then washing and filtering to obtain a precursor; and (3) calcining the precursor to obtain the pyrochlore-structure high-dispersity lanthanum zirconate nanopowder. The chemical co-precipitation method is used to synthesize the lanthanum zirconate nanopowder in one step, the synthesized lanthanum zirconate nanopowder is of the pyrochlore structure, has high dispersity and small particle size (50-100 nm). The preparation method is simple and controllable, the required equipment is simple and low in requirement, the reaction temperature is low, the preparation cost is low, and the method is easy to realize large-scale industrial production.

Synthesizing lithium lanthanum zirconate includes combining a reagent composition with a salt composition to yield a molten salt reaction medium, wherein the reagent composition comprises a lithium component, a lanthanum component, and zirconium component having a lithium:lanthanum:zirconium molar ratio of about 7:3:2; heating the molten salt reaction medium to yield a reaction product; and washing the reaction product to yield a crystalline powder comprising lithium lanthanum zirconate.

This invention relates to an iron-based lithium lanthanum zirconate solid electrolyte, its preparation method, and a lithium battery. The iron-based lithium lanthanum zirconate solid electrolyte of this invention has a cubic lithium-rich garnet structure with space group , and its chemical formula is Li. 7‑3x La 3‑y Zr 2‑z Fe x O 12 (where 0)

This invention discloses a flexible high-energy-storage capacitor film, its preparation method, and its application, belonging to the field of dielectric thin-film capacitor preparation technology. The purpose of this invention is to solve the problem of low energy storage performance in existing capacitor films. The flexible high-energy-storage capacitor film is composed of an antiferroelectric layer material and a relaxation layer material; the antiferroelectric layer material is lead zirconate (PbZrO3, PZO), and the relaxation layer material is lead lanthanum zirconate titanate (Pb). 0.9 La 0.1 Zr 0.52 Ti 0.48 O3, PLZT); This invention studies the heat treatment temperature of antiferroelectric layer and relaxor layer materials, and further designs heterogeneous composite films with different stacking structures; This invention uses the sol-gel method to prepare heterogeneous composite films, introduces relaxor layer materials into antiferroelectric layer materials, reduces the leakage current density of capacitor films, and improves the energy storage performance of capacitor films.

Fabricating a layer including lithium lanthanum zirconate (Li7La3Zr2O12) layer includes forming a slurry including lanthanum zirconate (La2Zr2O7) nanocrystals, a lithium precursor, and a lanthanum precursor in stoichiometric amounts to yield a dispersion including lithium, lanthanum, and zirconium. In some cases, the dispersion includes lithium, lanthanum, and zirconium in a molar ratio of 7:3:2. In certain cases, the slurry includes excess lithium. The slurry is dispensed onto a substrate and dried. The dried slurry is calcined to yield the layer including lithium lanthanum zirconate.

The invention relates to a method for preparing a lanthanum zirconate hollow pipe, in particular to a method for preparing a lanthanum zirconate hollow pipe based on a carbon template. The invention aims to solve the technical problem that no preparation method for the lanthanum zirconate hollow tube exists at present. According to the preparation method, the lanthanum zirconate hollow tube is prepared by using the carbon fiber as the template at low cost and adopting a sol impregnation method, so that the morphology of the lanthanum zirconate hollow tube is controllable. The carbon fibers have inherent hydroxyl groups through surface treatment in the production process, and adsorption of the lanthanum zirconate precursor is facilitated. In order to enable the lanthanum zirconate hollow pipe to have certain strength, the lanthanum zirconate hollow pipe needs to be densified. The carbon fiber is used as a carrier in the process so that collapse of the lanthanum zirconate hollow structure can be avoided, and the prepared lanthanum zirconate hollow pipe has high temperature resistance, light weight and easy formability and has important significance for expanding light-weight research of lanthanum zirconate.