76 results about "Tantalate" patented technology

The invention discloses a method for preparing low-oxygen tantalum powder through magnesium reduction. Aiming at the defects of more impurities, non-uniform particles, complex process and the like in the existing tantalum powder preparation technology, the method comprises the following steps: firstly, pretreating tantalum oxide powder and anhydrous calcium chloride, so that tantalum oxide is uniformly coated with calcium chloride; and mixing the pretreated raw materials with magnesium chips, introducing high-purity argon into a closed container for multiple times of replacement, carrying out heating and heat preservation to generate a reaction, separating a product, and then carrying out water washing, acid pickling and drying treatment to obtain the tantalum powder. According to the method, magnesium and tantalum oxide are fully reacted by virtue of heat absorption and fluxing effects of calcium chloride, so that composite substances such as tantalate are prevented from being generated, and impurity introduction is reduced. The oxygen content of the prepared low-oxygen tantalum powder is smaller than 3000 ppm, the apparent density is 1.3-1.5 g / cm < 3 >, powder particles are in a coralline shape and are uniform in size, operation is easy and convenient, the requirement for equipment is low, and the low-oxygen tantalum powder has good application prospects in the field of electronic component manufacturing.

The invention discloses a data-driven high-infrared-radiation-characteristic high-entropy rare earth tantalate material screening method and application, and belongs to the technical field of thermal barrier coating materials. The method aims at breaking through the infrared radiation performance bottleneck of a traditional rare earth tantalate ceramic material, a high-precision prediction model of the infrared emissivity of the rare earth tantalate is innovatively developed by constructing a multi-system common data set, and rapid evaluation of the infrared spectral characteristics of the A-site high-entropy rare earth tantalate RE3TaO7 material is achieved. On the basis of the model, a multi-element rare earth tantalate system which comprises (Y < 0.2 > Dy < 0.2 > Gd < 0.2 > Sm < 0.2 > Nd < 0.2 >) < 3 > TaO7 and (Nd < 0.2 > Eu < 0.2 > Dy < 0.2 > Er < 0.2 > Yb < 0.2 >) < 3 > TaO7 and has excellent infrared radiation characteristics is successfully screened out. According to the method, the limitation of traditional small sample material research is broken through through big data modeling, and an efficient theoretical design normal form is provided for developing a novel high-entropy infrared radiation material.

The invention discloses a high-entropy rare earth tantalate ceramic with ultralow transmittance / broadband high emissivity and a preparation method of the high-entropy rare earth tantalate ceramic, and belongs to the technical field of thermal barrier coating materials. The invention aims to solve the problems that the existing rare earth tantalate ceramic material is insufficient in thermal radiation penetration resistance and poor in infrared radiation performance, and the thermal conductivity is too high due to doping of transition group ions and a second phase. The phase composition of the high-entropy rare earth tantalate ceramic with ultralow transmittance / broadband high emissivity is (4RE < 0.2 > Gd < 0.2 >) 3TaO7, RE is a combination of any four elements of Pr, Nd, Sm, Eu, Tb, Dy and Y, and the molar ratio of the four elements to Gd is 1: 1: 1: 1: 1. According to the prepared high-entropy rare earth tantalate ceramic, the near-infrared band transmittance is smaller than 3%, the emissivity is larger than 0.9, the high-temperature emissivity is larger than 0.75, and the heat conductivity at the high temperature is smaller than 1.3 W.m <-1 >. K <-1 >.

The invention provides a composite positive electrode material and a preparation method and application thereof. The composite positive electrode material comprises a lithium manganese iron phosphate inner core, and an inorganic coating layer and an organic coating layer which sequentially coat the surface of the lithium manganese iron phosphate inner core, wherein the inorganic coating layer comprises a lithium niobate tantalate material, and the organic coating layer comprises polypyrrole and polyolefin. By adopting an inorganic-organic composite coating strategy, on one hand, the high stability of the lithium niobate tantalate material is taken as a core support, the volume expansion of the positive electrode material in the charging and discharging process is inhibited, the structural stability of the material in a high-temperature and high-voltage environment is enhanced, and the potential safety hazard is reduced; on the other hand, by means of high conductivity of polypyrrole, the problem that the intrinsic conductivity of the positive electrode material is low is solved, the rate capability of the battery is effectively improved, meanwhile, the interface protection effect of polyolefin is utilized, the interface side reaction and dissolution of metal ions such as Mn and Fe are inhibited, and the cycle life of the battery is prolonged.

The application discloses a potassium fluorotantalate crystallization purification method, and relates to the technical field of tantalum hydrometallurgy and fluorotantalate crystallization purification. The method comprises the following steps: filtering a tantalum-containing fluorine acid solution, adding a potassium source and a tantalum-niobium separation type composite crystallization regulator, stirring and complexing, seed induction, controlled cooling crystallization, graded removal of the regulator, solid-liquid separation, and potassium fluoride containing fluorine acid washing to obtain primary purified potassium fluorotantalate crystals, and then redissolving the primary purified potassium fluorotantalate crystals in a fluorine-containing acid solution, correcting the K / Ta molar ratio, repeatedly regulating and crystallizing, graded removal of the regulator, washing, and drying to obtain high-purity potassium fluorotantalate. The regulator can reduce the entrainment of niobium impurities and reduce the residual amount of the regulator itself, thereby improving the purity of the product and the Ta yield.

The present invention discloses an α-U3O8 layered tantalate upconversion luminescent material and a preparation method thereof. The preparation method of the α-U3O8 layered tantalate upconversion luminescent material comprises the following steps: S1: weighing raw material one, Er2O3, Yb2O3 and Ta2O5, mixing and grinding, wherein the raw material one is an oxide or salt of A, and A is Sr, Ca, Na, Bi, La, Eu, Gd or Y; S2: mixing the raw material mixture obtained in step S1 with 1 to 10 times the weight of B2O3, sintering at 900°C to 1200°C for 4h to 24h; S3: adding water to the material sintered in step S2, filtering it with suction, and drying it for 2h to 24h to obtain Er2O3. 3+ and Yb 3+ Co-doped α-U3O8 layered tantalate upconversion luminescent material. The green fluorescence intensity of the α-U3O8 layered tantalate upconversion luminescent material described in the present invention is comparable to that of NaYF4:Er 3+ / Yb 3+ Upconversion phosphors are expected to replace NaYF4:Er in acid-base environments, high-temperature environments, biomedicine, and temperature sensing. 3+ / Yb 3+ Upconversion phosphors.

The present application relates to the technical field of photoelectric functional crystal materials, in particular to a preparation method of tetragonal transparent potassium tantalum niobate crystal, comprising the following steps: (1) plating electrodes on the surface of the crystal; (2) controlling the temperature of the potassium tantalum niobate crystal with plated electrodes to be within the range of 2-6 ℃ below the Curie point and keeping it constant all the time; (3) polarizing the crystal by applying an alternating electric field under ultraviolet laser irradiation to obtain the tetragonal transparent potassium tantalum niobate crystal. The potassium tantalum niobate crystal prepared by the method can maintain a transparent state for a long time without a large thermal shock, solving the problem that the tetragonal potassium tantalum niobate crystal cannot be applied in the field of electro-optical modulation due to low light transmittance, and also solving the problem of light scattering caused by micro-domain walls of the cubic potassium tantalum niobate crystal near the Curie point.

The invention relates to the technical field of tantalate thermal barrier coatings, in particular to a construction method and application of a rare earth tantalate material multi-performance prediction model, and the construction method comprises the following steps: collecting Young modulus, shear modulus, thermal expansion coefficient and thermal conductivity data of a rare earth tantalate material; an initial feature set is constructed based on material component features, and redundant features are deleted by using a Pearson correlation analysis method to reduce the complexity of the model. And modeling and evaluating various machine learning models. And on the basis of each performance optimal model, SFFS sequence floating forward feature subset screening is carried out. And finally, integrating the optimal feature set of each performance, and constructing a multi-performance integrated prediction model of the rare earth tantalate material. According to the method, the high-precision component-multi-performance mapping model can be constructed, the Young modulus, the shear modulus, the thermal expansion coefficient and the thermal conductivity of the rare earth tantalate material can be quickly and accurately predicted, the consumption of experiment resources is reduced, and the experiment progress is accelerated.

The present disclosure provides a high-entropy rare earth-toughened tantalate ceramic. The ceramic is prepared by sintering Ta2O5 powder and x types of different RE2O3 powder, 4≤x≤9, and the molar ratio of the RE2O3 powders is 1. RE2O3 powder and Ta2O5 powder having the molar ratio of RE to Ta being 1:1 are weighed, a solvent is added for mixing, and ball milling is performed by a ball mill to obtain mixed powder M; the powder M is dried at a temperature of 650-850° C. for 1.5-2 h to obtain dried powder; the powder is sieved to obtain powder N, the powder N is placed in a mold for first pressing to obtain a rough blank, and the rough blank is then pressed for the second time to obtain a compact blank; the compact blank is sintered to obtain the high-entropy rare earth-toughened tantalate ceramic.

The invention belongs to the technical field of ceramic metal composite materials, and particularly relates to a multiphase ceramic composite plate and a preparation method thereof, and a metal-based ceramic composite lining plate for a ball mill and a preparation method thereof. The composite material comprises the following components in parts by weight: 70-90 parts of zirconium oxide, 5-10 parts of silicon carbide, 5-10 parts of aluminum oxide, 2-6 parts of titanium dioxide, 2-5 parts of tungsten carbide, 2-4 parts of scandium oxide, 2-4 parts of cobalt oxide, 1-3 parts of potassium tantalate, 1-3 parts of potassium titanate, 1-2 parts of bismuth trioxide and 1-2 parts of erbium oxide. A compact ceramic plate is obtained through mixing, wet grinding, drying, pressing and high-temperature sintering, and the special-shaped ceramic sheet is formed through further crushing and screening. The special-shaped sheet is laid in a mold and filled with high-chromium cast iron powder, and the integrated metal-based ceramic composite lining plate with a stable structure is formed through compaction and high-temperature sintering. The prepared lining plate has the high hardness of ceramic and the toughness of metal, and is suitable for high-abrasion equipment such as a ball mill.

The invention relates to the field of photoelectric function crystal material growth, in particular to a high-optical-uniformity potassium tantalate niobate crystal grown through a floating zone method and a method. The method comprises the following steps: (1) calculating a raw material ratio, and determining components of a flux charge bar and a supply bar; (2) performing two-step sintering and cold isostatic pressing to form a raw material rod; (3) carrying out crystal growth by adopting an optical floating zone furnace, regulating and controlling the melting rate of a feeding rod and melt convection, and ensuring stable components; and (4) carrying out thermal annealing treatment in an oxygen environment to improve the performance of the crystal and obtain the high-quality KTN crystal with the component uniformity of 10 <-5 > / mm. A precious metal crucible is not needed, the technological process is simplified, the equipment and material cost is reduced, the raw material utilization rate is remarkably increased, and the method is suitable for large-scale production.

This invention discloses a thermal shock resistant gradient composite coating on the surface of a silicon carbide-based composite material and its preparation method, relating to the field of high-temperature protective coating technology. The method includes sequentially preparing n layers of silicon-doped tantalate aSi-b(DTa) on a fiber-reinforced silicon carbide-based composite material matrix. 1‑x Si 2x O4 forms a thermal shock resistant gradient composite coating system, wherein a = 1–0, b = 0–1, and x = 0.01–0.09; the thickness of each silicon-doped tantalate layer increases sequentially from the inside out, while the porosity decreases sequentially. Due to the intrinsic properties of the coating material and the gradient coating structure design, the gradient composite coating of this invention possesses stronger fracture toughness, higher bonding strength, lower thermal diffusion rate, and a more suitable coefficient of thermal expansion, giving it superior thermal shock resistance and significantly improving the service life of silicon carbide-based composite materials. It is an extremely advanced high-temperature protective coating for silicon carbide-based composite material surfaces.

The application discloses a Bi4Ti3O12 nanosheet piezoelectric catalyst and a preparation method and application thereof. Bi(NO3)3*5H2O, Ti(OC4H9)4 and Ta2O5 are used as raw materials to prepare a precursor through co-precipitation, NaCl and KCl are used as molten salts to mix the precursor, and then ball milling is carried out, the obtained powder after the ball milling is dried, and then a molten salt reaction is carried out, so that the product is obtained, and after washing and drying, the Bi4Ti3O12 nanosheet piezoelectric catalyst is obtained, and is successfully applied to piezoelectric catalytic degradation of rhodamine B. The prepared Bi4Ti3O12 nanosheet piezoelectric catalyst is a nanosheet with high purity and good crystallinity, and a high-activity exposed surface is beneficial to improving the transmission and separation of photo-generated charges, improving the piezoelectric catalytic performance of the Bi4Ti3O12 nanosheet piezoelectric catalyst, and the preparation process is simple.

The invention discloses thermal barrier coating powder with a micro-explosion effect and an efficient evaporation agglomeration structure and a preparation method of the thermal barrier coating powder, and belongs to the technical field of thermal spraying materials. The thermal barrier coating powder is powder with an agglomeration structure and is formed by uniformly mixing and agglomerating hollow polymer microspheres and nano ceramic particles through an organic binder; the hollow polymer microspheres comprise one or more of polymethyl methacrylate, polyethylene, polystyrene, polylactic acid, polyacrylic acid, polyvinyl butyral, polyisobutene, polycarbonate and polyethylene glycol terephthalate; the nano ceramic particles comprise one of yttrium oxide stabilized zirconium oxide, rare earth zirconate, multi-element rare earth doped zirconate, rare earth tantalate and oxide. The method is used for solving the technical problem that in an existing PS-PVD process, part of powder is only melted in plasma jet and is not fully gasified, so that a lamellar structure where melted particles are accumulated is formed in a coating, and an ideal vapor deposition columnar crystal structure is not formed.

The invention discloses an ultrahigh-temperature long-life aero-engine thermal barrier ceramic coating based on rare earth tantalum carbide and a plasma spraying preparation method of the ultrahigh-temperature long-life aero-engine thermal barrier ceramic coating based on rare earth tantalum carbide, and the chemical formula of the ultrahigh-temperature long-life aero-engine thermal barrier ceramic coating based on rare earth tantalum carbide is Y < 1-x > / 2Ta < 1-x > / 2MxO4, wherein X is more than 0 and less than 0.8, M is Ti, Hf and Zr, and the molar content of each element in M is equal. The medium-entropy rare earth tantalate ceramic provided by the invention is simple in raw material component, relatively low in heat conductivity at high temperature, good in heat insulation performance and relatively high in thermal expansion coefficient at high temperature, so that when the powder of the medium-entropy rare earth tantalate ceramic is used as a thermal barrier coating, the expansion stress between the powder and a base material (or a bonding layer) is reduced, and cracks are reduced. In addition, due to the excellent fracture toughness, the coating can well resist external impact during service, and the coating has wide application prospects in the aspect of aero-engine hot end component surface coatings.

Provided is a novel tantalate dispersion containing no hardly-volatile organic component and having high dispersibility in water, the tantalate dispersion containing tantalum or / and tantalate and amine in water, the tantalate dispersion having an intensity ratio (5.5° / 29°) of an intensity at 2θ=5.5° to an intensity at 2θ=29° being 1.00 or more in an X-ray diffraction pattern obtained by subjecting a powder obtained by drying the tantalate dispersion to powder X-ray diffraction measurement using CuKα rays.

The invention belongs to the technical field of thermal barrier coatings, and particularly relates to composite powder for a thermal barrier coating, the thermal barrier coating and a preparation method. The composite powder is spherical-like powder with a hollow structure, the composite powder comprises composite tantalate with the chemical formula of (Hfx, Zr1-x) 6Ta2O17, and x ranges from 0.2 to 0.8. The thermal barrier coating formed by spraying the composite powder has the advantages that the thermal conductivity is obviously reduced, the high-temperature phase structure stability is obviously improved, and the service life of the thermal barrier coating can be obviously prolonged.

This application provides an in-situ grown needle-like blend of GdTaO4 / Sm-CeO2 radiation-resistant and antibacterial particles, its preparation method, and its application, relating to the fields of radiation protection materials and antibacterial materials. The radiation-resistant and antibacterial particles of this application use needle-like gadolinium tantalate as the radiation shielding matrix. A sheet-like samarium-doped cerium dioxide antibacterial component is uniformly grown on its surface using a hydrothermal in-situ growth method, resulting in a dual-functional composite material with an integrated needle-sheet blend structure. This application achieves strong interfacial bonding between the two phases through rare-earth lattice matching, while in-situ growth solves the core problem of easy agglomeration in physically blended powders. The resulting composite material possesses both radiation protection (X-rays + thermal neutrons) and highly efficient antibacterial functions. It exhibits controllable crystallization, strong batch stability, good compatibility with various matrices, stable structure, and uniform dispersion. It can be directly used as a functional filler or further processed into molds. The resulting products can be applied in fields such as nuclear industry protection, radiation medical dressings, military protective equipment, and civilian antibacterial and radiation-resistant products.

The present invention belongs to the technical field of thermal barrier coatings, and specifically relates to a composite powder for thermal barrier coatings, a thermal barrier coating and a preparation method. The composite powder is a spherical powder with a hollow structure, and the composite powder includes a chemical formula of (Hf x ,Zr 1‑x )6Ta2O 17 The composite tantalate, wherein x is 0.2-0.8. The thermal barrier coating formed by the composite powder spraying has significantly reduced thermal conductivity and significantly improved high-temperature phase structure stability, and can significantly extend the life of the thermal barrier coating.

The present invention discloses a lithium tetraborate-zinc tantalate scintillating glass-ceramics and its preparation method and application. The chemical composition expression of the borate scintillating glass-ceramics of the present invention is Li2B4O7-x at% Zn3Ta2O8, where 0 < x ≤ 20, and the proportion of the microcrystalline phase Zn3Ta2O8 doping in the overall borate scintillating glass-ceramics is 0 to 20 at%. The scintillating luminescent material in the present invention is synthesized by the high-temperature melting method, is stable in air, has a safe and simple process, and is easy to control. Under X-ray excitation, the light yield of the scintillating glass-ceramics of the present invention is 455 to 3198 ph. / MeV. Among them, the light yield of Li2B4O7-5 at% Zn3Ta2O8 is the highest, which is 35.5% of the BGO crystal, and it is a glass-ceramic scintillator with a high light yield that emits light by means of Zn3Ta2O8.

The invention belongs to the technical field of coating optimization, and particularly relates to a tantalate / YSZ (Yttria Stabilized Zirconia) double-ceramic-layer thermal barrier coating thickness optimization method which comprises the following steps: establishing double-ceramic-layer thermal barrier coating models with different layer thicknesses; performing finite element analysis on the model to obtain residual stress and effective thermal conductivity; drawing an axial stress curve, a first principal stress curve and an effective thermal conductivity curve based on the residual stress and the thermal conductivity; and determining an optimal optimization area according to the curve, and selecting the most adaptive coating thickness in the actual process from the optimal optimization area. The thickness control problem in the actual preparation process of the double-ceramic-layer thermal barrier coating can be solved.

The present application provides a supported manganese tantalate catalyst with controlled crystal faces and a preparation method thereof, relating to the field of catalytic materials. The supported manganese tantalate catalyst comprises manganese tantalate and an activated alumina support, wherein the structure of the manganese tantalate comprises at least one of an octahedral structure, a nano-platelet sphere structure, and a nano-flowered sphere structure. The supported manganese tantalate catalyst provided herein can expose supported manganese tantalate with specific highly active crystal faces, so that the manganese tantalate phase is uniformly distributed on the surface of the activated alumina sphere support in the form of nano-scale octahedra, platelets, and flowers, thereby increasing the number and availability of active sites and accelerating electron transfer at the solid-liquid interface, significantly improving the activation efficiency of persulfate.

The invention relates to a preparation process of a tantalum-based coating material in the technical field of thermal insulation materials. The preparation process comprises the following steps: S1, pretreating raw materials; drying tantalum oxide and magnesium oxide, and then carrying out mixing, ball milling and screening treatment; s2, blank forming; the screened mixed powder material is pressed and molded into a blank block; s3, calcining and synthesizing; carrying out high-temperature calcination on the pressed and molded briquette to synthesize magnesium tantalate; s4, granulating and refining; carrying out crushing and granulation processing on magnesium tantalate blocks generated by calcination; s5, sintering and ceramization; the magnesium tantalate material obtained through granulation processing is pressed and molded into a green body, glue discharging and high-temperature sintering are carried out, and finally the compact magnesium tantalate ceramic is obtained. The magnesium tantalate ceramic is uniform in component, free of segregation and low in manufacturing cost, the thermal performance index can reach the application standard of ceramic for a thermal barrier coating, the preparation process is simple and efficient, high purity can be guaranteed, the raw material cost is low, and good economical efficiency is achieved.

The invention discloses a gradient high-temperature-resistant anti-oxidation coating for a substrate glass platinum channel and a preparation method of the gradient high-temperature-resistant anti-oxidation coating. The gradient high-temperature-resistant anti-oxidation coating comprises yttrium oxide stabilized zirconia (YSZ) with the thickness of 0.1-0.5 mm as a middle bonding transition layer, and yttrium oxide stabilized zirconia (YSZ) with the thickness of 0.1-0.5 mm as a middle bonding transition A composite material of rare earth tantalate and YSZ (Yttria Stabilized Zirconia) with the thickness of 0.05-0.2 mm is used as an outer functional protective layer, and the doping amount of the YSZ is 10-30wt%. The whole coating adopts a component gradient transition design, is prepared by an atmospheric plasma spraying technology, and is assisted by subsequent heat treatment. According to the structure, thermal expansion mismatch is effectively relieved, the bonding strength of the coating and a platinum substrate is improved, diffusion of oxygen and oxidative volatilization of platinum at a high temperature are remarkably inhibited, and the problem of pulverization of a traditional YSZ coating in a high-temperature environment is solved. The method can greatly prolong the service life of the platinum channel, reduces the production cost, and is suitable for the field of manufacturing of advanced display substrate glass.

The present invention relates to the field of rare earth materials, and discloses a rare earth tantalate ceramic based on a hydrothermal method and a preparation method thereof. The chemical formula of the tantalate material is (MO2) x ‑(Y3TaO7) 1‑x Where 0 < X ​​< 0.2, and M represents an equimolar mixture of three metal cations: Ti, Hf, and Zr. The ceramic material is formed by hydrothermally sintering TaCl₅ powder, YCl₃ powder, TiCl₄ powder, ZrCl₄ powder, and HfCl₄ powder. This invention comprehensively optimizes the composition and preparation process of rare earth tantalate ceramics, achieving both low thermal conductivity and high fracture toughness, which is of great significance in the industry.

The invention relates to a piezoelectric substrate on insulation (POI) (130, 138, 144, 152, 166) comprising a support substrate (100) including a trapping layer (102) on a free surface (104) of the support substrate (100), a piezoelectric layer (106), an intermediate structure (110) positioned sandwiched between the piezoelectric layer (106) and the trapping layer (102) of the support substrate (100), wherein the intermediate structure (120) includes at least one Tantalate Oxide (Ta2O5)-based metallic element diffusion barrier layer (122, 122') having a thickness tEM greater than a predetermined thickness, said predetermined thickness being determined as a function of the thickness of the trapping layer (102) such that the dose of metallic element in the trapping layer (102) is below a predetermined threshold dose.The invention also relates to a method for manufacturing such a piezoelectric substrate on an insulator (POI) (130, 138, 144, 152, 166). Figure for the abstract: Figure 1.

The invention relates to the technical field of material screening, in particular to a rare earth tantalate material heat conductivity screening method based on active learning, which comprises the following steps: firstly, evaluating a model by adopting a component-leaving grouping cross validation method to ensure the reliability of the model on the aspect of unseen components; secondly, core feature parameters are compressed through feature engineering, and the model efficiency is improved. And finally, calculating a thermal conductivity expected improvement value EI for the thermal conductivity model by adopting an active learning framework based on Bootstrap sampling so as to quantify the potential of the material for breaking through the current optimal thermal conductivity. Then, screening a high-potential material for experimental preparation, and substituting the high-potential material into a data set for iteration until an optimal material is obtained; the optimal component can be locked from 1690000 components only through two rounds of experiments, the research and development cost is remarkably reduced, the method is suitable for development of high-temperature heat insulation materials, and an efficient and reliable new normal form is provided for design of aero-engine thermal barrier coating materials.

The invention belongs to the technical field of preparation of thermal barrier coating ceramic powder, and particularly relates to rare earth tantalate / niobate and zirconate (RETa / NbO4 and RE2Zr2O7) composite ceramic powder and a preparation method of the rare earth tantalate / niobate and zirconate (RETa / NbO4 and RE2Zr2O7) composite ceramic powder. The molecular formula of the rare earth tantalum / niobate and zirconate composite ceramic powder is (RETa / NbO4) x (RE2Zr2O7) 1-x, wherein x is more than 0 and less than 1; rE is one or a mixture of more of Y, Yb, Gd, La, Nd, Lu, Sm, Eu, Dy and Er. By doping rare earth elements, the thermodynamic property of the powder material can be improved; the thermal barrier coating ceramic powder (RETa / NbO4) x (RE2Zr2O7) 1-x can be directly synthesized through a one-step method, the process is simple, and compared with physical mixing after synthesis, the powder synthesized in one step is more uniform in component and more excellent in performance.

The invention relates to the technical field of coating protection, in particular to a tantalum ceramic fireproof coating and a preparation method thereof. The fireproof coating comprises the following components in parts by weight: 100 parts of epoxy resin, 30-45 parts of a curing agent, 15-30 parts of rare earth tantalate, 60-80 parts of aluminum ore slag, 20-40 parts of hematite, 5-10 parts of nano aluminum oxide and 1-3 parts of a water reducing agent. According to the tantalum ceramic fireproof coating disclosed by the invention, the rare earth tantalate is effectively utilized, and meanwhile, the prepared fireproof coating has a relatively high melting point and good fire resistance, and is relatively low in heat conductivity coefficient, high in heat insulation capability and relatively good in overall homogeneity.

Apparatus and methods for growing films of complex layered metal oxides with high stoichiometries and high crystal qualities are provided. The layered complex metal oxides include two or more metals and oxygen and have a layered structure. The methods, which are referred to as hybrid pulsed laser deposition (hybrid PLD), synergistically combine the advantages of molecular beam epitaxy (MBE) and pulsed laser deposition (PLD) to grow complex metal oxide films that include metals with very different vapor pressures.