24 results about "Zirconate" patented technology

The application discloses a nano-structure thermal protection coating for hydrogen fuel gas turbine and a preparation method thereof. The nano-structure thermal protection coating takes high-temperature alloy as a substrate, and sequentially deposits a bonding bottom layer, a yttrium stabilized zirconium oxide or zirconate intermediate layer and a silicate top layer on the surface of the substrate. The application starts from the design of the coating structure, and aims at the problems of low service temperature and poor water-oxygen corrosion resistance of the existing thermal protection coating for gas turbine. The water-oxygen corrosion resistance function of the silicate material is superimposed on the thermal protection coating for gas turbine, and the coating structure is optimized to form a new thermal protection coating structure resistant to high-temperature corrosion. The new thermal protection coating structure can not only meet more extreme service environments, but also resist water-oxygen corrosion at high temperature. The new thermal protection coating structure is suitable for hydrogen fuel power generation gas turbine, and is also suitable for hydrogen fuel or hydrogen mixed marine engines, hydrogen fuel rocket engines and other hydrogen fuel gas turbines.

This invention relates to the field of high-temperature protective coatings, and particularly to a composite coating and its preparation method. The composite coating provided by this invention includes an adhesive layer and a ceramic coating; the ceramic coating comprises a composite ceramic material; the composite ceramic material has a core-shell structure, with the core being high-entropy rare-earth zirconate and the shell being high-entropy rare-earth aluminate. During CMAS corrosion, the easily soluble high-entropy rare-earth aluminate in the outer shell can protect the high-entropy rare-earth zirconate grains in the core, forming a more significant difference in dissolution kinetics; simultaneously, the core-shell structure effectively reduces the high-temperature thermal shock experienced by the high-entropy rare-earth zirconate in the core, thereby protecting the structural integrity of the high-entropy rare-earth zirconate. On the other hand, the high-entropy rare-earth aluminate in the outer shell preferentially contacts and reacts with the high-temperature CMAS melt, inducing the precipitation of the high-entropy rare-earth aluminate garnet phase, constructing a dense garnet / high-entropy rare-earth zirconate composite barrier layer in situ, significantly reducing the penetration of molten salt.

This invention discloses a superhydrophobic composite passivation film and its preparation method, belonging to the field of coating preparation technology. The invention involves sequentially forming a zirconium-based chemical conversion film and a fluorinated functionalized silica layer on a substrate surface to obtain the superhydrophobic composite passivation film. The zirconium-based chemical conversion film and the fluorinated functionalized silica layer are connected by Si-O-Zr or Si-O-Al covalent bonds. The zirconium-based chemical conversion film is obtained by deposition through dissociation coordination and interfacial redox reactions using fluorozirconate, fluoride, vanadate, and manganese nitrate as raw materials; the fluorinated functionalized silica layer is obtained by spraying nano-silica after fluorination and functionalization with perfluorosilane. This invention organically couples an inorganic passivation film with a superhydrophobic micro / nano structure, resulting in a superhydrophobic composite passivation film with a static water contact angle ≥150° and a static oil contact angle ≥150°, achieving dual repulsion of water and oil, and reducing the emission of volatile organic compounds during the preparation process.

A one-part room temperature vulcanisable (RTV) silicone composition containing a catalyst comprising (i) a titanate and / or zirconate and (ii) a metal carboxylate salt which cures to a silicone elastomer which may be used as a clear sealant which avoids discolouration and loss of adhesion upon aging.

This invention discloses a non-equimolar ratio high-entropy rare-earth zirconate ceramic and its composition design and preparation method. Based on the CMAS corrosion response behavior of single rare-earth zirconate ceramics, rare-earth elements are classified into interface stabilizers for forming a dense interfacial reaction layer and crystal resists for enhancing lattice stability. The ratio of these two elements is then directionally controlled to design a non-equimolar ratio high-entropy rare-earth zirconate ceramic material, chemically represented as (RE1...). a RE2 b 2Zr₂O₇. During preparation, rare earth oxides and zirconium oxide powder are weighed according to stoichiometric ratios, and then sequentially ball-milled, calcined, granulated, cold-pressed, and sintered to obtain a dense ceramic material. This invention overcomes the blind spots of traditional equimolar ratio design. The non-equimolar ratio high-entropy rare earth zirconate ceramic material designed and prepared exhibits significantly better CMAS corrosion resistance than existing equimolar ratio high-entropy rare earth zirconate ceramic systems, and has broad application prospects in the field of thermal barrier coatings.

The application discloses a PZT-based piezoelectric ceramic material and a preparation method and application thereof. The PZT-based piezoelectric ceramic material comprises lead zirconate titanate and a doping element, wherein the doping element is neodymium and chromium, the doping amount of the neodymium is 2x mol% of the lead zirconate titanate, the doping amount of the chromium is 2ymol% of the lead zirconate titanate, 0.4<=x<=0.8, 0.15<=y<=0.25, the structural formula of the lead zirconate titanate is Pb(Zr z Ti 1‑z )O3, and the lead zirconate titanate is a solid solution formed by lead titanate and lead zirconate. Nd2O3 and Cr2O3 serve as dopants and play the roles of soft doping and hard doping respectively, which is beneficial to the common improvement of piezoelectric performance and temperature stability and can realize the comprehensive performance without degradation under a high-temperature environment. The application effectively solves the technical problem that the existing lead-based piezoelectric ceramic material is difficult to have piezoelectric performance and temperature stability under a high-temperature environment.

This invention belongs to the field of thermal barrier coating technology for aero-engines, and relates to an erbium-cerium dual rare earth modified europium zirconate thermal barrier coating material and its preparation method. The molecular formula of the thermal barrier coating material is (Er x Ce y Eu (1‑x‑y) The erbium-cerium dual-rare-earth modified europium zirconate thermal barrier coating is prepared by electron beam physical vapor deposition (EBPV) with x = 0.05~0.2 and y = 0.1~0.3. The deposition process parameters are: electron beam current intensity 1.5-1.7 A; sample temperature 950-1050℃; evaporation time 30-60 min. The evaporation time is controlled to obtain an erbium-cerium dual-rare-earth modified europium zirconate thermal barrier coating on a rotating sample. The thermal barrier coating material of this invention has a coefficient of thermal expansion close to that of YSZ and exhibits low thermal conductivity. Furthermore, the use of electron beam physical vapor deposition to prepare the erbium-cerium dual-rare-earth modified europium zirconate thermal barrier coating results in a columnar crystal structure and good lifespan. This invention can reduce the thermal conductivity of the coating, increase its service temperature, and address the problem of insufficient coating service life.

This invention discloses a water-resistant ABS composite material, its preparation method, and its application, belonging to the field of polymer materials technology. The water-resistant ABS composite material comprises the following components in parts by weight: 100 parts of bulk ABS resin, 0.3-1.5 parts of organic red pigment, 0.5-1.2 parts of modified inorganic red pigment, and 0.1-1 parts of heat resistant agent. By introducing an inorganic red pigment modified with a zirconate coupling agent and compounding the bulk ABS resin, organic red pigment, modified inorganic red pigment, and heat resistant agent, this invention can improve the color stability of the ABS composite material while ensuring its mechanical properties, making it less prone to discoloration under high-temperature boiling conditions. This makes the ABS composite material provided in this application suitable for preparing heat-resistant and / or moisture-resistant plastic products.

This invention discloses a photocurable composite solid electrolyte separator and its preparation method. The photocurable composite solid electrolyte separator includes a base film and a coating on the base film. The coating is obtained by applying a slurry. The raw materials for preparing the slurry include a modified solid electrolyte, a photoinitiator, a crosslinking agent, and a pore-forming agent. The modified solid electrolyte is a solid electrolyte treated with an inorganic nanoparticle precursor. The inorganic nanoparticle precursor is one or a mixture of aluminum isopropoxide, barium nitrate, tetrabutyl titanate, tetraethyl orthosilicate, tetrabutyl zirconate, and zinc acetate. The photoinitiator can initiate a crosslinking reaction under light irradiation to form a three-dimensional network structure, which significantly improves the heat resistance of the separator. The modified solid electrolyte can simultaneously improve the ionic conductivity and heat resistance of the separator, and effectively improve the problem of poor interfacial compatibility of solid electrolytes, ultimately achieving comprehensive optimization of the heat resistance, ion transport performance, and interfacial stability of the lithium battery separator.

This invention belongs to the field of special ceramics preparation technology, specifically relating to a high-temperature resistant special ceramic and its preparation method. The high-temperature resistant special ceramic, by weight, comprises the following raw materials: 22-24 parts calcined kaolin, 20-22 parts andalusite, 30-32 parts tabular corundum, 2.5-4.5 parts calcite, 1.3-2.3 parts cerium phosphate, 15-17 parts calcium zirconate, 3.7-4.7 parts yttrium oxide, 2-3 parts titanium diboride, and 1.2-2.2 parts gadolinium trioxide. The high-temperature resistant special ceramic of this invention uses tabular corundum, calcined kaolin, and andalusite as main raw materials, calcite and cerium phosphate as sintering aids, and calcium zirconate, yttrium oxide, titanium diboride, and gadolinium trioxide as fillers, ensuring that the prepared special ceramic exhibits excellent flexural strength and fracture toughness at high temperatures.

Coating components having a layer with a composition comprising a rare earth-doped zirconium / hafnium oxide are provided. The rare earth-doped zirconium / hafnium oxide has a formula: (Ln1aLn2aLn3aLn4aLn5b)2M2O7 where each of Ln1, Ln2, Ln3, Ln4, and Ln5 is a different rare earth element such that Ln1 and M have a first atomic radius ratio that is 1.35 to 1.45, Ln2 and M have a second atomic radius ratio that is 1.35 to 1.45, Ln3 and M have a third atomic radius ratio that is 1.46 to 1.78, and Ln4 and M have a fourth radius ratio that is 1.46 to 1.78; a is 0.2 or 0.25; b is 0.2 when a is 0.2, and b is 0 when a is 0.25; and M is Zr, Hf, or a mixture thereof. Methods of forming a coating that includes this composition, along with the resulting coated components, are also provided.

This invention provides a zirconate compound powder that allows for the production of sintered bodies with a high shrinkage rate at a low sintering temperature, even without containing impurities. [Solution] The material has a perovskite structure ABO3, with at least one atom selected from the group consisting of barium, strontium, and calcium in the A site, and zirconium in the B site, and a BET specific surface area of ​​20 m². 2 A zirconate compound (A) having less than / g, and a perovskite structure ABO3 having at least one atom selected from the group consisting of barium, strontium, and calcium at the A site, and zirconium at the B site, with a BET specific surface area of ​​20m². 2 A zirconate compound powder containing zirconate compound (B) in an amount of 1 / g or more, wherein the content ratio of zirconate compound (B) in 100 ml of the total amount of zirconate compound (A) and zirconate compound (B) {B / (A+B)} is 0.1 to 50 mol%.

The application discloses a kind of high-efficiency cooling process based on potassium nitrate production in chemical process technical field, including dissolving dispersion, circulating cooling, seed-induced crystallization and vacuum-assisted cooling step.Potassium nitrate crude product is dissolved in deionized water and heated stirring, shear dispersion is added to barium calcium zirconate titanate and lithium silicate composite nano cooling accelerator, and dispersion solution is obtained;Dispersed solution is pumped into heat exchanger and cooled, and then returned to crystallization kettle;When the temperature drops to the appropriate range, potassium nitrate seed is added to induce crystallization;Start vacuum cooling system to assist cooling to room temperature, centrifugal separation after crystallization aging, solid is washed with ice water and dried to obtain product.Composite nano cooling accelerator is prepared by solvothermal method to prepare barium calcium zirconate titanate nano core, modified by anhydrous silane coupling agent grafting, then coated with lithium silicate mesoporous shell, and finally modified with surface hydrophilicity.The application improves the crystallization efficiency and product particle size uniformity, and the mother liquor can be recycled, to reduce energy consumption and production cost.

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.

This invention discloses a rare-earth zirconate ceramic fiber and its preparation method, belonging to the field of rare-earth zirconate ceramic fiber preparation technology. The invention involves thoroughly dissolving and uniformly mixing water, binder, zirconium salt, rare-earth salt, lower alcohol, and N,N-dimethylformamide to form a transparent precursor spinning solution, followed by air-blown spinning combined with thermotropic crystallization to prepare fibers. The rare-earth zirconate ceramic fibers of this invention have a diameter of 200–500 nm and possess a pyrochlore or defective fluorite-like structure. This structure contains certain microscopic defects, which effectively reduce the mean free path of phonons, thereby reducing the rate at which heat energy passes through the material and lowering the thermal conductivity. This allows the material to exhibit excellent thermal insulation performance in high-temperature applications, while also possessing a certain degree of elasticity.

This invention provides a wear-resistant, non-slip matte ceramic tile and its preparation method, relating to the field of ceramic tile preparation technology. The tile includes a ceramic matrix, the surface of which is covered with a base glaze and a functional glaze. The base glaze, by weight, comprises 38-42 parts potassium feldspar powder, 23-27 parts quartz powder, 13-17 parts kaolin, 8-12 parts calcite powder, 4-6 parts zinc oxide, 1-2 parts sodium carboxymethyl cellulose, and 55-60 parts water. The functional glaze, by weight, comprises 16-18 parts 3mol% yttrium oxide-stabilized zirconium oxide powder, 13-16 parts silicon carbide powder, 0.5-0.9 parts magnesium borate, 0.2-0.4 parts ammonium polyacrylate, 0.3-0.5 parts calcium zirconate powder, 1.4-1.6 parts tetraethyl orthosilicate hydrolysate, 27-29 parts potassium feldspar powder, 22-25 parts quartz powder, and 60-66 parts water. The beneficial effects of this invention are: high wear resistance and long-lasting anti-slip properties are achieved through zirconium oxide phase transformation stress regulation and microcrack structure design.

The application discloses a zirconate rare earth-based high-entropy ceramic-silicon dioxide fiber membrane for thermal protection of lithium / sodium ion batteries and a preparation method thereof, and relates to the technical field of high-entropy ceramic nanofiber preparation. Specifically, the zirconate rare earth-based high-entropy ceramic-silicon dioxide fiber membrane precursor is successfully prepared by using an electrostatic spinning technology, and the zirconate rare earth-based high-entropy ceramic-silicon dioxide fiber membrane with flexibility, high-temperature resistance and heat insulation performance is obtained by further processing through a calcination process, so as to provide efficient thermal protection for lithium / sodium ion batteries.

The present invention provides a transparent rare earth zirconate film, wherein the rare earth zirconate has the following chemical formula: Re x Zr 4‑ x O7, wherein 0 < x < 4; Re is selected from one or more of Yb, Gd and Sm. The present invention also provides a method for preparing the transparent rare earth zirconate film of the present invention, comprising the following steps: (1) using an electron beam deposition device and utilizing Re2O3 and ZrO2 target materials to prepare an amorphous film on a substrate; (2) subjecting the amorphous film to an annealing process to obtain the transparent rare earth zirconate film Re x Zr 4‑x O7. The present invention also provides the use of the transparent rare earth zirconate film of the present invention or the transparent rare earth zirconate film prepared by the method of the present invention in a thermal barrier coating. The rare earth zirconate film of the present invention is transparent, so that its transmittance can be directly measured, and the film of the present invention is also resistant to high temperature, and can be used as a thermal barrier coating.

This invention belongs to the field of surface thermal protection coating technology, and relates to a thermal barrier / high emissivity dual ceramic coating with adjustable thickness and its preparation method. The coating has a multi-layered structure, comprising, from the inside out, a metal bonding layer, a thermal barrier ceramic layer, and a high emissivity layer. The metal bonding layer is a NiCrAlY alloy bonding layer or a CoNiCrAlY alloy bonding layer. The ceramic layer is a multi-principal rare earth zirconate (RE2Zr2O7, RE=La / Nd / Sm / Eu / Gd) ceramic layer with low thermal conductivity. The high emissivity layer is a Sr-doped lanthanum ferrite layer. The dual ceramic coating of this invention has a gradient structure design, which can effectively alleviate the thermal mismatch stress caused by the difference in thermal expansion coefficients between the materials in each layer. Combining the high emissivity material, the low thermal conductivity material, and the metal bonding layer can reduce the heat conduction of high-temperature airflow to the substrate while enhancing the thermal radiation of the coating surface, greatly reducing the thermal load on the substrate.

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.

This invention discloses a method for vacuum-assisted drop-coating to fill defects in plasma-sprayed high-entropy thermal barrier coatings, relating to the field of high-temperature protective coating technology. Based on a synergistic mechanism of vacuum negative pressure drive and in-situ generation of α-alumina, this invention solves the problems of insufficient penetration depth and poor compatibility in filling techniques. The vacuum environment can expel air from the coating interior and defects, creating unobstructed penetration channels for aluminum chloride sol. Combined with a multi-drop-coating process, the sol can deeply penetrate internal defects such as pores and microcracks formed by plasma spraying. After heat treatment at 1100℃, the sol is in-situ transformed into an α-alumina filling phase. This filling phase forms a single-phase solid solution with the high-entropy rare-earth zirconate coating with defective fluorite structures, resulting in no harmful impurities and a tight interface. The small amount of free space reserved after alumina filling can release macroscopic thermal stress generated during thermal cycling, preventing new cracks from forming due to stress concentration and ensuring the stability of the coating.

This invention discloses a pressurized cyclic ablation protection structure against energy weapons with multi-band adjustable characteristics. The structure includes a sealed interlayer container, a carrier solvent filled within the interlayer, functional particles suspended in the carrier solvent, an anti-settling agent, and an active pressurized circulation system. Multi-band optical scattering and thermal blocking are achieved through a surface-modified rare-earth zirconate and titanium dioxide mixed powder. The addition of fumed silica or hollow ceramic microspheres prevents particle settling. The pressurized circulation system suppresses high-temperature solvent vaporization and drives laminar flow, achieving a synergistic coupling of optical scattering, thermal physical blocking, and convective heat transfer. This invention allows for customized protection frequency bands by adjusting particle ratio and particle size, adapting to different application scenarios. It solves the technical problems of poor adaptability to a single frequency band, easy particle settling, and easy high-temperature vaporization and penetration of traditional protection structures, making it suitable for protection against directed energy weapons in various missiles, aircraft, and other equipment.

This invention relates to a zirconate ceramic with electromagnetic wave modulation properties. The zirconate ceramic has the general chemical formula A₂Zr₂O₇, where the A-site is composed of three or four metallic elements, including La, selected from La, Pr, Co, Cu, Fe, Ni, and Cr; and the molar percentage of each element at the A-site is between 20% and 50%. The zirconate ceramic has a single pyrochlore structure with space group Fd⁻³m; its average light absorptivity in the 0.3–2.5 μm wavelength range is greater than 0.92, and its average infrared emissivity in the 0.78–25 μm wavelength range is greater than 0.90. This invention also discloses a method for preparing this zirconate ceramic. By introducing transition metal elements at the A-site, this invention provides the possibility of optimizing electromagnetic wave modulation performance. The obtained zirconate ceramic has crucial application value in fields such as solar thermal utilization, aerospace thermal protection, industrial high-temperature energy saving, infrared stealth, and radiative cooling.

This invention belongs to the field of thermal barrier coating (EB-PVD) technology, and relates to a method for preparing an interlayer gradient transition layer in EB-PVD. The invention first deposits MCrAlY metallic material, followed by the deposition of YSZ, rare earth zirconates, and high-entropy ceramic materials, combining physical vapor deposition (PVD) and ion beam bombardment. Simultaneously, high-energy ion bombardment of the deposition surface further enhances the deposition rate. A YSZ gradient structure transition layer is deposited on the surface of the metal binder layer, and a gradient element transition layer is deposited at the interface between the YSZ layer and the rare earth zirconate or high-entropy ceramic layer. The ion-assisted deposition process can improve the deposition rate of the EB-PVD process, accurately control the coating composition, reduce the preheating temperature, decrease interlayer residual stress during coating preparation and thermal cycling, further improve the bonding strength of the thermal barrier coating, and ultimately extend the service life of the coating.