157 results about "Zirconate" patented technology

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 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 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.

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 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 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 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.

The application discloses a sealing coating, a preparation method and application. The sealing coating is attached to an alloy base body, and the sealing coating comprises a metal bonding layer and a composite structure ceramic layer which are sequentially deposited on the alloy base body. The composite structure ceramic layer comprises columnar structures and particles filled in gaps of the columnar structures. The columnar structures and the particles filled in the gaps of the columnar structures independently comprise one or more of YSZ and rare earth zirconate. The porosity of the composite structure ceramic layer is 22% to 40%. The sealing coating has high porosity, low surface Rockwell hardness and high friction coefficient, and the sealing coating has excellent wear resistance. The preparation method of the sealing coating adopts a plasma physical vapor deposition technology, and the process flow is simple.

The application discloses a belt filter for zirconium titanate production wastewater treatment and relates to the field of belt filters.The belt filter comprises an equipment frame body, a group of first compression rollers and a group of second compression rollers which are rotatably arranged in the equipment frame body, and the outer surfaces of the first compression rollers are provided with first filter belts, and the second compression rollers and the first compression rollers are further provided with second filter belts, the first filter belts and the second filter belts are supported by first supporting components and second supporting components, the solid particles in the solid-liquid mixture are dispersed by the rollers in the limiting sleeves, then the solid-liquid mixture of the zirconium titanate is uniformly applied to the upper end surfaces of the first filter belts under the actions of the distribution frame body and the flow dividing component, the solid-liquid separation treatment can be performed by the transmission and extrusion of the first filter belts and the second filter belts, and the first filter belts and the second filter belts can effectively avoid the situation that the solid particles are agglomerated and the first filter belts and the second filter belts cannot uniformly apply pressure to the solid-liquid mixture for dewatering.

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 high-entropy rare earth zirconate superfine nano ceramic powder and a preparation method thereof, the molecular formula of the nano ceramic powder is (xREy) 2Zr2O7, RE is 5-6 of Eu, Gd, Dy, Ho, Sm, Y, Yb, Er, Nd and La, the value of x is 5 or 6, and the value range of y is 5%-35%; the preparation method comprises the following steps: dissolving ZrOCl2. 8H2O with the molar content percentage of 50% and 5-6 RE nitrate hydrate powder with the molar content percentage of 2.5%-17.5% in deionized water, then adding urea, stirring in a water bath, and carrying out suction filtration and washing while the solution is hot to obtain precursor powder; and then calcining and uniformly grinding to obtain the high-entropy rare earth zirconate superfine nano ceramic powder. The average particle size of the prepared high-entropy rare earth zirconate superfine nano ceramic powder is only 4-50 nm, the element distribution is uniform, the component adjustment space is large, and the high-entropy rare earth zirconate superfine nano ceramic powder does not contain impurities and the like. The preparation method has the advantages of low synthesis temperature, simple equipment, simple and controllable process, low industrialization cost and the like.

The present disclosure provides a photocurable composition, a light condensing layer, and a display device. The photocurable composition includes an acrylic resin, a photoinitiator, and a nanoparticle composite. Raw materials for preparing the nanoparticle composite include an inorganic nanoparticle, a surface of which is provided with active hydroxyl groups, and an organic compound including at least one of a titanate coupling agent and a zirconate coupling agent.

This invention discloses a method for preparing high-entropy zirconate PVD ceramic films. The method involves first spray-granulating five rare earth oxides—nano-Sm₂O₃, nano-Eu₂O₃, nano-Tb₂O₃, nano-Dy₂O₃, nano-Lu₂O₃, and nano-ZrO₂—with zirconium oxide to obtain target raw material powder. After sieving, spherical powders with different particle size ratios are obtained. These powders are then used to fabricate target green bodies using cold isostatic pressing, followed by sintering. Finally, the high-entropy zirconate EB-PVD target is deposited onto a smooth and glossy PVD substrate using PVD technology to form a high-entropy zirconate PVD ceramic film. The high-entropy ceramic film prepared using PVD technology exhibits significantly improved high-temperature stability, capable of withstanding environments exceeding 1500℃, enhanced interfacial adhesion, and adaptability to repeated thermal cycling requirements.

The invention discloses a high-sensitivity mass-block-free piezoelectric acceleration sensor design which is suitable for weak vibration signal detection in the fields of industrial equipment monitoring, aerospace, consumer electronics and the like. Aiming at the problems of high cost, large size and limited bandwidth caused by mass block design and mechanical rigidity adjustment of a traditional piezoelectric acceleration sensor, a single lead zirconate titanate piezoelectric ceramic (PZT) sheet is adopted as a sensitive element, and collaborative improvement of sensitivity and bandwidth is realized through innovative structural design. The core structure of the sensor comprises an early warning bolt, a gasket, an upper insulating sheet, a lower insulating sheet, a piezoelectric sensitive element and a base. The early warning bolt exerts high pre-tightening force through a shell threaded hole, provides rigid contact downward pressure and ensures the rigidity of the whole structure. The gasket and the upper and lower insulating sheets form complete equal-surface contact, the contact area of the piezoelectric ceramic is maximized, and a traditional mass block is replaced; the insulation sheet is provided with a welding groove and a wiring groove, flatness deviation caused by welding spots is avoided, and charge transmission stability is guaranteed. According to the design, a mass block is omitted, the structure is simplified, the preparation cost is reduced, and meanwhile the size miniaturization of the sensor is achieved through the synergistic effect of high pre-tightening force and a low-rigidity structure. Tests show that the sensitivity of the sensor reaches 192.3 pC / g, the use frequency range covers 10-3000Hz (recommended 10-700Hz), and the sensor has the characteristics of high sensitivity and wide bandwidth, and is suitable for the high-end fields of ultra-precision measurement, extreme environment monitoring and the like.