194 results about "Zirconate" patented technology

The invention discloses a wear-resistant and mildew-proof ceramic tile which comprises a green body and a glaze layer attached to the green body, and the wear-resistant and mildew-proof ceramic tile is obtained by coating the surface of the green body with a modified interface agent and then glazing, wherein the glaze layer is prepared from the following raw materials in parts by weight: 40 to 50 parts of silicon dioxide, 30 to 35 parts of aluminum oxide, 15 to 20 parts of modified titanium dioxide, 6 to 10 parts of barium carbonate, 6 to 10 parts of mullite, 5 to 8 parts of silver-loaded zirconium phosphate, 4 to 8 parts of potassium carbonate, 4 to 8 parts of sodium carbonate, 3 to 7 parts of limestone, 3 to 5 parts of sodium borate, 2 to 4 parts of zinc oxide and 0.5 to 1 part of sodium tripolyphosphate. According to the ceramic tile, the modified interface agent with specific composition is introduced between the ceramic tile green body and the glaze layer, modified titanium dioxide and inorganic components (such as aluminum phosphate, aluminum acetylacetonate and tetrapropyl zirconate) in the interface agent form oxides in the sintering process, and the interface bonding strength is remarkably enhanced through physical occlusion; and the long-term wear resistance and mildew resistance of the ceramic tile glaze layer are improved.

The invention belongs to the technical field of ceramic materials, and particularly relates to a ceramic dielectric material and a preparation method and application thereof. The ceramic dielectric material provided by the invention is prepared from the following raw materials: barium titanate, calcium zirconate, a sintering aid and a modifier, the sintering aid is a Li-Zn-B-Si glass material; and the modifier comprises one or more of Nb2O5, MnCO3, MgO and RE2O3 (rare earth oxide). The ceramic dielectric material has the advantages of high-temperature stability, high dielectric constant, low loss and high insulating property.

The invention discloses a nanoscale double-phase high-entropy zirconate fiber membrane and a preparation method thereof, and belongs to the field of high-entropy ceramic fiber new material preparation, and the fiber membrane is composed of continuous high-entropy zirconate fibers; the chemical structural formula of the high-entropy zirconate fiber is (La0. 2Sm0. 2Gd0. 2Dy0. 2Yb0. 2) 2Zr2O7, and the high-entropy zirconate fiber comprises a biphase structure of pyrochlore and defective fluorite. Through the cooperation of the high-entropy structural design and the electrostatic spinning-calcining method, the fiber membrane has a pyrochlore and defective fluorite double-phase structure and a small grain size, so that the fiber membrane is endowed with good anti-sintering performance, heat insulation performance and high-temperature stability, and meanwhile, the fiber membrane has certain flexibility.

The invention belongs to the technical field of magnetic refrigeration, and particularly discloses a rare earth europium-based zirconate magnetic refrigeration material and a preparation method and application thereof. The general chemical formula of the rare earth europium-based zirconate magnetic refrigeration material is (Eu1-xMx) (Zr1-yNy) O3, M is any one of Ca, Sr or Ba, N is any one of Nb, Ta, Ti or Hf, x is more than or equal to 0 and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 0.5, and the magnetic phase transition temperature of the rare earth europium-based zirconate magnetic refrigeration material is less than 10K. The magnetic refrigeration material shows excellent magnetocaloric performance near the liquid helium temperature, and is expected to be applied to the liquid helium temperature zone magnetic refrigeration technology; and the preparation method is simple in process, safe and environment-friendly, and can be applied to industrial production.

The invention relates to the technical field of thermal barrier coatings for gas turbines or aero-engines, and particularly discloses an ultra-thick and strong-bonding double-ceramic-layer thermal barrier coating and a preparation method thereof.The thermal barrier coating is composed of an MCrAlY bonding layer, a YSZ ceramic layer bottom layer and a high-entropy rare earth zirconate ceramic layer surface layer; the MCrAlY bonding layer is prepared through atmospheric plasma or hypersonic flame spraying, YSZ and high-entropy rare earth zirconate spherical powder serve as spraying raw materials, and the thermal barrier coating is prepared through an axial powder feeding high-energy plasma spraying system. The thermal barrier coating has the characteristics of super thickness (the coating thickness is 600-1200 microns), high bonding strength (gt; 19 MPa) and the like.

The invention relates to an agglomerated ceramic abrasive which is prepared from the following raw materials in percentage by weight: 25-30% of a ceramic bond, 65-70% of diamond micro-powder, 1-3% of titanium powder, 2.5-5% of nitrate, 0.3-0.5% of nickel sulfate and 1-3% of aluminum zirconate, and is prepared by the following steps: adding water into the raw materials, uniformly mixing, and grinding; and then carrying out spray granulation, impurity drying and sintering to obtain the agglomerated ceramic abrasive material. Compared with a common ceramic bond diamond agglomerated abrasive material, the agglomerated ceramic abrasive material prepared by the method has the advantages of high hardness, uniform particle distribution, good grinding performance and the like. When the agglomerated ceramic abrasive is used for polishing marble tiles, no obvious scratches appear on the surfaces of the tiles, the surface consistency is good, and the polishing efficiency of the marble tiles is high.

The invention belongs to the technical field of special ceramic preparation, and particularly relates to high-strength special ceramic and a preparation method thereof. The high-strength special ceramic is prepared from the following raw materials: alumina powder, quartz powder, serpentine, phosphorus slag, eucryptite, barium borate, nano yttrium trifluoride, nano hafnium boride, nano strontium zirconate, nano lanthanum titanate and polyborosilazane. According to the high-strength special ceramic disclosed by the invention, the aluminum oxide powder, the quartz powder, the serpentine and the phosphorus slag are taken as matrix raw materials, eucryptite, barium borate and yttrium trifluoride are taken as fluxing agents, and nano hafnium boride, nano strontium zirconate, nano lanthanum titanate and polyborosilazane are taken as fillers, so that the prepared special ceramic has excellent bending strength and fracture toughness.

The invention relates to the technical field of refractory materials, in particular to an aluminum oxide synthetic fiber felt and an airflow melting preparation method thereof. The invention relates to an airflow melting preparation method of an aluminum oxide synthetic fiber felt. The method comprises the following steps: preparing composite sol from aluminum oxide powder, rare earth element powder, tetrabutyl titanate and / or tetrabutyl zirconate and a nano reinforcing material; and adding an organic template agent, carrying out dry spinning, presintering and high-temperature sintering, and blowing the sintered fibers into a collector through high-speed airflow to obtain the aluminum oxide synthetic fiber felt. The rare earth element powder and the nano reinforcing material are introduced, a micro-nano-scale reinforcing phase is formed in the aluminum oxide synthetic fiber, stress can be effectively dispersed, crack propagation is prevented, the mechanical strength and fracture toughness of the fiber are improved, and the structural integrity and performance stability of the fiber felt at high temperature are kept; the metal oxide can enhance the hardness and wear resistance of the fibrofelt, and also endows the fibrofelt with excellent chemical stability and multiple functions.

The invention discloses a sealing coating, a preparation method and application. The sealing coating is attached to an alloy matrix and comprises a metal bonding layer and a composite structure ceramic layer which are sequentially deposited on the alloy matrix, and the composite structure ceramic layer comprises a columnar structure and particles filled in gaps of the columnar structure. The components of the columnar structure and the particles filled in the gaps of the columnar structure respectively and independently comprise one or more of YSZ and rare earth zirconate; the porosity of the composite structure ceramic layer is 22%-40%. The sealing coating provided by the invention has relatively high porosity, relatively low surface Rockwell hardness and relatively high friction coefficient, which means that the sealing coating provided by the invention has more excellent wear resistance. According to the preparation method of the sealing coating, the plasma physical vapor deposition technology is adopted for preparation, and the technological process is simple.

The invention discloses a continuous casting submersed nozzle for improving castability of rare earth steel, the continuous casting submersed nozzle comprises a nozzle body, a slag line and an inner hole body, the inner hole body is a ZrO2-CaO-C material, the raw material of the inner hole body is calcium zirconate and graphite, and the inner hole body material comprises the following components in percentage by weight: 45-59% of ZrO2, 18-22% of CaO, 20-32% of C and the balance of inevitable impurities. According to the method, the problems of nodulation and blockage of the submersed nozzle in the continuous casting production process of the rare earth steel and reaming caused by poor corrosion resistance in use can be effectively relieved, the castability of the rare earth steel under multi-furnace continuous casting can be ensured, and the method is beneficial to improving the quality of a casting blank and realizing efficient and stable production of continuous casting.

The invention provides rare earth zirconate-based complex-phase high-entropy ceramic as well as a preparation method and application thereof, and belongs to the technical field of ceramic materials. The rare earth zirconate-based complex-phase high-entropy ceramic disclosed by the invention comprises a rare earth zirconate high-entropy matrix (La < 0.2 > Gd < 0.2 > Y < 0.2 > Y 0.2 < Er < 0.2 >) 2 (Zr < 0.5 > Ti < 0.5 >) 2O7 with a pyrochlore structure and a second-phase rare earth manganate high-entropy material (La < 0.2 > Gd < 0.2 > Y < 0.2 > Y 0.2 < Er < 0.2 >) MnO3 with a perovskite structure. The rare earth zirconate-based complex-phase (pyrochlore-perovskite) high-entropy ceramic for shielding thermal radiation is prepared by taking high-entropy rare earth zirconate with a pyrochlore structure as a matrix and taking a rare earth manganate high-entropy material with a perovskite structure as a second phase (dopant). The prepared complex-phase high-entropy ceramic can effectively improve the thermal radiation shielding performance and hinder the radiation heat conduction at high temperature, thereby inhibiting the rapid increase of the thermal conductivity at high temperature.

The invention provides a CMAS corrosion resistant thermal barrier coating and a preparation method thereof.The CMAS corrosion resistant thermal barrier coating comprises a metal bonding layer, an yttria-stabilized zirconia layer and a multi-component rare earth zirconate layer, and the yttria-stabilized zirconia layer and the multi-component rare earth zirconate layer are sequentially arranged on the metal bonding layer. The multi-component rare earth cerate layer and / or the CMAS barrier layer are / is sequentially arranged on the multi-component rare earth zirconate layer; the multi-component rare earth zirconate layer comprises multi-component rare earth zirconate, the chemical formula of the multi-component rare earth zirconate is (nRE1 / n) 2Zr2O7, RE is any n of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and n is not smaller than 10; the CMAS barrier layer includes an anti-corrosion oxide having an optical basicity of 0.55 to 0.68. The CMAS corrosion resistant thermal barrier coating disclosed by the invention realizes high thermal insulation, sintering resistance and CMAS corrosion resistance, reduces the surface temperature of a matrix alloy, and improves the sintering resistance and CMAS corrosion resistance of ceramics.

The invention discloses a gradient preparation method of a compact barrier type rare earth ceramic coating, and belongs to the technical field of high-temperature protective coatings. The preparation method comprises the following steps: pretreating a tungsten electrode substrate; sequentially preparing a sensor layer integrated with a distributed optical fiber sensor, a gradient transition layer which is realized by adopting a four-channel synchronous powder feeding technology and has continuous and gradual components, and a self-adaptive layer which is prepared by adopting a laser-induced in-situ synthesis technology and contains high-entropy rare earth zirconate and an intelligent additive; the self-healing layer contains a triple temperature triggering microcapsule system; and finally, post-processing and function activation are carried out. The prepared coating forms an intelligent response type gradient composite structure from inside to outside, has excellent interface bonding strength, thermal shock resistance and high-temperature chemical stability and has damage self-healing and service state real-time monitoring functions, and the service life of the tungsten cathode under the severe working condition is remarkably prolonged.

The invention discloses an iron oxide pigment with super weather resistance and corrosion resistance and a preparation method thereof, and relates to the technical field of weather-resistant and corrosion-resistant iron oxide pigments. The invention discloses an iron oxide pigment with super weather resistance and corrosion resistance. The iron oxide pigment is prepared from the following components in parts by mass: 100 parts of iron oxide, 1.5 to 3 parts of silane coupling agent, 2 to 4 parts of aluminum zirconate, 0.5 to 1.5 parts of weather-resistant antioxidant, 0.8 to 2 parts of molybdate corrosion inhibitor, 0.5 to 2 parts of nano silicon dioxide and 0.3 to 1 part of organic bentonite. Through an innovative composite formula and a preparation process, the stability of the iron oxide pigment in severe environments such as ultraviolet rays, damp heat and salt mist is greatly enhanced, excellent weather resistance and corrosion resistance are shown, the service life of the material can be effectively prolonged, and the maintenance cost can be reduced.

The invention discloses a preparation method of an ultrahigh-temperature EB-PVD thermal barrier coating. The preparation method comprises the following steps: carrying out spray granulation on five rare earth oxides, namely nano Sm2O3 powder, nano Eu2O3 powder, nano Tb2O3 powder, nano Dy2O3 powder, nano Lu2O3 powder and nano ZrO2 powder, and zirconium oxide to obtain target raw material powder; screening to obtain spherical powder with different particle size ratios, manufacturing a target blank by utilizing cold isostatic pressing, and then sintering the blank target; and depositing a high-entropy zirconate ceramic coating on the surface of the sample coated with the bonding layer by using an EB-PVD technology. The prepared coating has good high-temperature phase stability, a thermal expansion coefficient better matched with a base material and extremely low high-temperature thermal conductivity, especially has good phase, structure and component stability under the high-temperature service condition of 1700 DEG C, can replace a currently-used single-system EB-PVD material, and improves the high-temperature stability of an existing thermal barrier coating.

The invention discloses a double-ceramic-layer thermal barrier coating of a differentiated columnar crystal structure and a preparation method, and belongs to the technical field of thermal barrier coating corrosion and protection. The invention innovatively discovers and utilizes the double influence of the columnar crystal size on the performance of the coating; the YSZ layer adopts a fine grain structure of 1-1.5 microns, so that the bonding strength and thermal shock resistance of the coating can be obviously improved; and the modified gadolinium zirconate layer adopts a 2-3 [mu] m coarse grain structure, so that the heat conductivity can be reduced, the permeation path of CMAS along a grain boundary can be effectively inhibited, and meanwhile, the modified gadolinium zirconate layer reacts with CMAS to form a compact barrier layer to prevent further permeation of CMAS. Through accurate regulation and control of electron beam physical vapor deposition (EB-PVD) process parameters, differential control of the sizes of the two layers of ceramic columnar crystals is realized, and under the synergistic effect of the two columnar crystal structures with different sizes, the thermal cycle life and CMAS corrosion resistance of the whole coating system in an ultra-high-temperature environment are remarkably prolonged and improved.

The invention discloses a mold casting molten steel covering agent and a preparation method thereof, and the mold casting molten steel covering agent comprises the following components in parts by mass: 50-65 parts of expanded perlite, 6-10 parts of alumina powder, 2-5 parts of magnesium oxide powder, 25-35 parts of calcium oxide powder, 1-2 parts of fluorite powder, 2-5 parts of ferric oxide, 30-40 parts of porous calcium zirconate, 5-10 parts of calcium carbonate powder and 3-5 parts of acidified graphite. According to the invention, the proportion of carbon element and hydrous aluminosilicate in the covering agent is reduced, the recarburization effect on molten steel is reduced, and the oxidation resistance and thermal insulation capacity of the covering agent are improved.

In recent years, the aquaculture industry and the ocean ship industry develop rapidly, the requirements for materials such as ships, underwater equipment, fishponds and fishing gears are higher and higher, and the requirements for the performance of the materials are higher and higher. The aquatic product equipment needs to be soaked in water throughout the year, and the requirements for corrosion resistance and adhesion of materials of the aquatic product equipment are high; and meanwhile, higher requirements on the antifouling and self-cleaning capabilities of the material are also put forward. A mainstream super-amphiphobic material taking organosilane as a coupling agent is strict in construction condition, needs to be carried out at specific temperature and humidity, is relatively high in cost, and is not beneficial to sustainable recovery development due to lack of reprocessing or recovery capability. According to the super-amphiphobic composite material for preparing the primer by using the zirconate as the coupling agent, provided by the invention, the adhesion of a coating, especially metal, can be effectively enhanced, the corrosion resistance is remarkably improved, meanwhile, the cost is reduced, and the economy of fishermen engaged in marine aquatic products and even the aquaculture industry is improved.

The invention discloses a method for improving the quality of a fluorozirconate-silane film of a cold-rolled sheet. The aspects of removal of oxides on the surface of a casting blank, control of surface residues in a cold rolling state, the type of a produced working roll, surface microstructure characterization parameters, the oil coating amount, the time interval from oil coating to fluorozirconate-silanization, surface defect and corrosion point control, the number and area of oxide inclusions, the degreasing effect and the like are standardized; the steel plate surface quality is improved. The invention aims to comprehensively consider various factors influencing the quality of the fluorozirconate-silane film on the surface of the cold-rolled sheet and improve the quality of the fluorozirconate-silane film on the surface of the cold-rolled sheet, and aims to solve the technical problems of low quality and corrosion resistance of the fluorozirconate-silane film on the surface of the cold-rolled sheet at present.

The invention relates to a barium calcium zirconate titanate-sodium bismuth zirconate lead-free piezoelectric ceramic material and a preparation method and application thereof, the general formula of the ceramic material is (1-x) (Ba0. 85Ca0. 15Zr0. 1Ti0. 9O3)-x (Bi0. 5Na0. 5ZrO3), x is the molar percentage of Bi0. 5Na0. 5ZrO3 in the ceramic material, and x is greater than or equal to 0.30% and less than or equal to 1.80%. Compared with the prior art, the Ba < 0.85 > Ca < 0.15 > Zr < 0.1 > Ti < 0.9 > O < 3 > is subjected to doping modification through Bi < 0.5 > Na < 0.5 > ZrO < 3 >, so that the sintering temperature of the ceramic is reduced, and the targets of energy conservation and emission reduction are met. Meanwhile, the obtained ceramic material has a high piezoelectric constant and low dielectric loss, and has good electrical properties.

The invention relates to the field of high-temperature thermal resistance coatings, in particular to a material selection and preparation process of a low-infrared-transmittance coating, and particularly relates to a preparation method of a high-scattering-rate high-temperature thermal resistance coating, a base material of the high-scattering-rate high-temperature thermal resistance coating is Gd2Zr2O7, and the high-scattering-rate high-temperature thermal resistance coating further comprises a second-phase material; firstly, a required second-phase material is screened on the basis of machine learning in combination with experiments and a first principle, then a PS-PVD gas phase-solid phase codeposition method is adopted, the high-scattering-rate high-temperature thermal resistance coating is prepared, according to the obtained coating, a high-refractive-index-low-refractive-index interface between GdFeO3 particles and Gd2Zr2O7 gas phase columnar crystals can effectively increase scattering of infrared radiation, and the heat resistance of the coating is improved. And the vapor phase and solid phase co-deposited columnar crystals have uniform thermal physical properties, so that excellent coating binding force and excellent anti-sintering performance are provided.

The present invention provides a coated modified positive electrode material precursor, comprising a positive electrode material precursor and a coating material coated on at least part of the surface of the positive electrode material precursor, wherein the coating material is tungsten-modified calcium zirconate. Providing tungsten-modified calcium zirconate to coat and modify the positive electrode material precursor can significantly improve the cycle stability of the positive electrode material while reducing the negative impact on the discharge specific capacity, effectively extending the service life of the secondary battery, and improving the safety and reliability of the battery.

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.

The present invention discloses a nanometer dual-phase high-entropy zirconate material with nearly equal proportions, and a preparation method and application thereof, belonging to the technical field of thermal barrier coating materials. The present invention obtains five single rare earth metal salt solutions by dissolving lanthanum oxide, neodymium oxide, gadolinium oxide, dysprosium oxide and ytterbium oxide in acid solution respectively; the five single rare earth metal salt solutions are sequentially added to the zirconium salt solution in the order of ion radius from large to small to form a mixed solution with a uniform and stable tetramer structure, and then a precipitant is added to carry out precipitation reaction to obtain a gel-like precursor precipitate; the gel-like precursor precipitate is subjected to aging, ball milling and high-temperature calcination to obtain a high-entropy zirconate material. The zirconate material of the present invention exhibits extremely low thermal conductivity, extremely high thermal expansion coefficient, good mechanical properties and high-temperature stability through the synergistic effect of alloy components and nearly equal dual phases.

The invention belongs to the technical field of building materials, and particularly relates to moderate heat Portland cement and a preparation method thereof, and the cement is composed of Portland cement clinker, gypsum, blast furnace slag and two novel inorganic modified compounds. According to the invention, calcium aluminum silicon nitrogen oxide nanosheets and calcium zirconate coated lithium zinc borosilicate core-shell microspheres are innovatively introduced as functional modifiers. The two-dimensional structure of the two-dimensional structure plays dual roles of nucleation and shielding in the cement hydration process, so that the early strength development can be promoted, and the heat release process can be delayed; the latter generates controllable expansion in a specific hydration stage by virtue of a core-shell structure, so that the shrinkage stress is effectively compensated, and the anti-cracking performance is remarkably improved. The preparation method comprises the working procedures of raw material crushing, segmented grinding, homogenizing stirring and the like. The obtained cement product has excellent early strength, long-term durability and volume stability while keeping the low hydration heat characteristic, and is suitable for construction of major water conservancy projects and infrastructures which have strict requirements on temperature control of mass concrete.

A one-part, heat-porous, surface-condensation-curable silicone composition comprising an organopolysiloxane polymer having at least two alkoxy groups per molecule and a titanate- or zirconate-based catalyst, wherein the heat-porous substrate is at a temperature of at least 40°C. The porous substrate may be, for example, a building material, including stone, marble, brick, concrete, cement, and other cementitious substrates. The present invention also relates to a method for applying the one-part heat-porous, surface-condensation-curable silicone composition to a heat-porous substrate at a temperature of at least 40°C, and to the use of the one-part heat-porous, surface-condensation-curable silicone composition for treating a porous substrate at a temperature of at least 40°C.

The present application relates to a kind of high radiation resistance of control rod for stack entropy rare earth zirconate ceramic material and its preparation method and application, belong to nuclear reactor neutron absorption rod material technical field.The control rod ceramic material provided by the present application is prepared by using europium oxide, dysprosium oxide, thulium oxide and zirconium oxide as raw materials, according to certain proportion, after ball milling, calcination, green body forming and green body sintering process, and then processing to obtain the middle entropy rare earth zirconate ceramic material that can be applied to control rod.The rare earth zirconate ceramic material has excellent radiation resistance, large neutron absorption cross section and low reactivity value loss, and has high density, excellent thermal conductivity and low thermal expansion coefficient, and shows good application prospect in the field of control rod materials.

The invention relates to the technical field of thermal barrier coating materials, in particular to an unequal-ratio Ce doped pyrochlore and fluorite double-phase high-entropy rare earth zirconate thermal barrier coating material and a preparation method thereof. The chemical composition formula of the thermal barrier coating material provided by the invention is (La < 0.2 > Ce < 0.1 > Sm < 0.1 > Dy < 0.2 > Yb < 0.2 > Sc < 0.2 >) < 2 > Zr < 2 > O < 7 >, (La < 0.2 > Sm < 0.2 > Yb < 0.2 > Sc < 0.2 > Y < 0.1 > Ce < 0.1 >) < 2 > Zr < 2 > O < 7 >, and (La < 0.2 > Ce < 0.1 > Nd < 0.1 > Yb < 0.2 > Lu < 0.2 > Sc < 0.2 >) < 2 > Zr < 2 > O < 7 >. The thermal expansion performance of the prepared coating material is obviously improved under the conditions that the low thermal conductivity, the high mechanical property and the high sintering resistance are met at the same time, and therefore the high-entropy rare earth zirconate thermal barrier coating material of the Ce-containing double-phase structure is promoted, and it is guaranteed that the material is practically applied to the field of thermal barrier coating materials.

The present invention discloses a graphene oxide / barium calcium zirconate titanate composite piezoelectric ceramic with good biocompatibility and a preparation method thereof. The barium calcium zirconate titanate-based ceramic (Ba<subgt;0.85< / subgt;Ca<subgt;0.15< / subgt>Zr<subgt;0.1< / subgt>Ti<subgt;0.9< / subgt;)O<subgt;3< / subgt> is prepared according to the following steps: 1) proportioning, 2) ball milling, 3) drying, 4) calcination, 5) secondary ball milling, 6) drying, 7) sintering, 8) grinding and sieving. The graphene oxide / barium calcium zirconate titanate composite piezoelectric ceramic is prepared according to the following steps: 1) proportioning, 2) ball milling, 3) drying, 4) sieving, 5) sintering. The present invention combines the solid-phase sintering method and the rapid hot-pressing sintering method to successfully prepare the graphene oxide / barium calcium zirconate titanate composite piezoelectric ceramic. Moreover, the grain distribution of the prepared composite ceramic sample is relatively uniform, and the grain size is smaller, with high density. At the same time, the wettability and biocompatibility of the GO / BCZT composite piezoelectric ceramic material are relatively good. It is expected to further apply it in the field of biological materials and bone defect repair.

The invention discloses a PZT-based high-power piezoelectric ceramic and a preparation method thereof, and belongs to the technical field of piezoelectric ceramic materials. The chemical formula of the antimony manganese-lead zirconate titanate piezoelectric ceramic is 0.05 Pb (Mn < 1 / 3 > Sb < 2 / 3 >) O < 3 >-0.95 Pb < 0.97 > Sr < 0.03 > (Zr < 1 / 2 > Ti < 1 / 2 >) O < 3 + 0.1 wt% of manganese-containing oxide. By doping the manganese-containing oxide into the antimony manganese-lead zirconate titanate matrix, when the piezoelectric coefficient d33 of the prepared antimony manganese-lead zirconate titanate based piezoelectric ceramic reaches 393pC / N, the mechanical quality factor Qm can reach 1708, the electromechanical coupling coefficient is 0.630, the dielectric loss is 0.45%, the Curie temperature is 299 DEG C, and the antimony manganese-lead zirconate titanate based piezoelectric ceramic has excellent comprehensive performance.