51 results about "Oxide matrix" patented technology

The invention provides a positive electrode material and a preparation method and application thereof.The positive electrode material comprises a base body and an island-shaped coating layer arranged on the surface of the base body, and the base body is a lithium ion layered oxide with an O2 phase stacking structure; the coating layer is selected from one or more of oxides of an element M, and the element M is selected from one or more of Al, Mg, Ti, Y, Zr, La, Ce, Pr, Si, Sn, Cu, W, Sm, Gd, In, Zn and Fe. According to the positive electrode material disclosed by the invention, the surface of the lithium ion layered oxide matrix with the O2 phase accumulation structure is coated with the specific island-shaped oxide coating layer, so that the positive electrode material has relatively high specific capacity, structural stability and positive electrode interface stability under high voltage, and further good cycle performance is obtained.

The invention provides an oxide-loaded high-entropy alloy nanoparticle material as well as a preparation method and application thereof. The high-entropy alloy material comprises an oxide matrix and high-entropy alloy nanoparticles loaded on the surface of the oxide matrix, wherein the high-entropy alloy nanoparticles grow on the surface of the oxide matrix in situ. Therefore, strong interaction energy exists between the oxide matrix and the high-entropy alloy nanoparticles in the oxide-loaded high-entropy alloy nanoparticle material, the stability of the high-entropy alloy material can be improved, and meanwhile, the high-entropy alloy material also has excellent ionic conductivity and catalytic activity.

The application relates to a composite ultrathin full-transparent intelligent intermediate connecting layer, which comprises, from top to bottom, a first composite electrode, a photonic management composite tunneling layer and a second composite electrode; the first composite electrode is a grid-shaped transparent conductive film formed by reducing graphene oxide and silver nanowires, wherein the diameter of the silver nanowires is 20-40 nm, the length is 15-40 mu m, and the mass ratio of the reducing graphene oxide to the silver nanowires is 1:3 to 1:6; the photonic management composite tunneling layer is a zinc oxide matrix embedded with perovskite quantum dots; and the second composite electrode is an intelligent response electrode formed by combining aluminum-doped zinc oxide and vanadium dioxide; through accurate regulation of the material and structure, the application realizes >88% light transmittance and <35 Omega / sq square resistance, and simultaneously has the functions of photonic down-conversion and intelligent thermal management, thereby significantly improving the performance and stability of a stacked battery.

A CMAS resistant overlay coating including at least one CMAS resistant layer, wherein the overlay coating is i. disposed over a surface of a substrate including a material susceptible to CMAS corrosion, ii. includes a metal oxide matrix and iii. has at least partially a vertical columnar structure. Moreover, at least one non-oxidized metallic constituent selected from the group of aluminum, chromium and metallic constituents including aluminum and chromium is embedded in the metal oxide matrix. Furthermore, a substrate has a CMAS resistant overlay coating at issue on a surface of a material susceptible to CMAS corrosion. A CAE process is provided for forming such a CMAS resistant overlay coating on a surface of a material susceptible to CMAS corrosion.

The present disclosure relates to a porous catalyst including an oxide matrix structure having mesopores and micropores, and metal nanoparticles embedded in the oxide matrix structure, wherein the metal nanoparticles of the porous catalyst have residual compressive stress.

The invention relates to a magnetic material comprising at least iron, in metallic form and / or in oxide form, and at least an alumina oxide matrix, the iron content being between 15% and 70% by weight as element iron relative to the total weight of said material, characterized in that said material has a specific surface area greater than 50 m² / g and less than 300 m² / g, said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

The invention relates to a magnetic material comprising at least iron, in metal form and / or in oxide form, and at least one alumina oxide matrix, the iron content being between 15% and 70% by weight of iron element relative to the total weight of said material, characterized in that said material has a specific surface area greater than 50 m² / g and less than 300 m² / g, and said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

This invention relates to a sodium-ion battery cathode material, its preparation method, cathode sheet, sodium-ion battery, and its applications. The preparation method includes: mixing a polycrystalline layered oxide matrix with an organic carbon source, followed by melt infiltration and carbonization under pressure to obtain the sodium-ion battery cathode material. The organic carbon source has a melting point below 200°C and a viscosity of 50-300 mPa·s during melting. In the melt infiltration step, the organic carbon source can penetrate to the grain boundaries of the polycrystalline layered oxide matrix through capillary action. After carbonization, a continuous carbon network distributed along the grain boundaries and a carbon layer coating the polycrystalline layered oxide matrix can be formed. Simultaneously, during carbonization, the reducing gas generated by the decomposition of the organic carbon source can reduce the surface of the polycrystalline layered oxide matrix, forming oxygen vacancies. Therefore, the sodium-ion battery cathode material obtained by this preparation method exhibits excellent rate performance and cycle stability.

The invention relates to a magnetic material comprising at least iron, in metal form and / or in oxide form, at least one oxide matrix, the iron content being between 15% and 70% by weight of iron element relative to the total weight of said material, and at least silicon carbide in its alpha (α-SiC) crystallographic form, characterized in that said material comprises at most 25% by weight of hematite relative to the total weight of said material, said material being in the form of beads or extrudates.

This invention belongs to the field of cathode material technology, and specifically relates to a P2 / O3 coherent interface cathode material based on a high-ionic-potential element-induced topological phase transition, its preparation method, and its application. The P2 / O3 coherent interface cathode material of this invention comprises an O3-phase layered oxide matrix and a P2-phase reconstruction layer grown in situ on the surface of the O3-phase layered oxide matrix. The P2-phase reconstruction layer is formed by lattice reconstruction of the O3-phase layered oxide matrix surface induced by a high-ionic-potential element; the high-ionic-potential element includes any one of Si, Mo, W, and Te. This invention utilizes the high-ionic-potential element to induce an in-situ O3-to-P2 topological phase transition on the surface of the O3-type layered oxide matrix, inducing the formation of a high-voltage-stable P2-phase reconstruction layer with atomic-level coherent connectivity to the substrate. This can improve the structural stability, rate performance, and long-cycle stability of sodium-ion battery cathode materials at high cutoff voltages, and reduce residual alkali.

Closed-cell metal oxide particles and methods of making the same are disclosed in certain embodiments. In at least one embodiment, the closed-cell metal oxide particles comprise a metal oxide matrix defining an array of closed cells. Each closed cell encloses an inaccessible void volume. An external surface of the closed-cell metal oxide particles is defined by the array of closed cells.

The present invention relates to a composition comprising closed-cell metal oxide particles, each closed-cell metal oxide particle comprising: a metal oxide matrix defining an array of closed cells, each closed-cell encapsulating medium being inaccessible to a void volume, where an outer surface of the closed-cell metal oxide particle is defined by the array of closed cells, wherein the closed cell metal oxide particles have an average diameter of about 0.5 m to about 100 m, and an average porosity of about 0.3 to about 0.7.

The application discloses a preparation method of an energy-saving and environment-friendly composite material and belongs to the technical field of high-temperature-resistant ceramic matrix composite materials. In the application, hyperbranched polyborate is used as a high-carbon-sacrificial-layer precursor, and a four-step process of "fiber surface coating-pyrolytic carbonization-matrix densification-high-temperature oxidation burn-off" is adopted to build a uniform and controllable nanoscale escape type interface between alumina fibers and an oxide matrix. The application solves the problems of weak bonding force, uneven thickness and poor interface load transfer capacity of a traditional carbon coating, and the prepared composite material has high strength, high toughness and good high-temperature stability, and the process is simple, energy consumption is low, the environment is friendly, and the application is suitable for industrial production.

The invention discloses a wear-resistant thermal shock-resistant aluminum oxide honeycomb ceramic and a preparation method thereof. The aluminum oxide honeycomb ceramic comprises a compactly sintered aluminum oxide matrix; the fused corundum aggregate is uniformly dispersed in the matrix, and the surface of the fused corundum aggregate is pretreated to form a weak bonding interface; the spherical aluminum oxide aggregate is uniformly dispersed in the matrix, and the inert surface of the spherical aluminum oxide aggregate forms another weak bonding interface; and uniformly dispersed spherical closed pores formed by a pore forming agent. The compact matrix ensures excellent wear resistance, the weak bonding interface and the spherical closed pores have a synergistic effect, and controllable microcracks are triggered during thermal shock to release stress, so that the thermal shock resistance is remarkably improved. The preparation method comprises the following steps: carrying out surface modification on the fused alumina, mixing with the spherical alumina, the alumina powder, the pore-forming agent and the like, carrying out extrusion molding, drying, and sintering at a high temperature of 1500-1680 DEG C. The prepared honeycomb ceramic is excellent in comprehensive performance, and the service life is greatly prolonged.

This invention belongs to the field of pharmaceutical chemical synthesis technology, specifically relating to a method for preparing high-yield dicyandiamide by urea pyrolysis. The method includes a reaction process using urea and alkaline earth metal oxides as raw materials in a sealed environment, wherein the reaction pressure is 0.1 to 0.3 MPa. Experiments show that by maintaining a positive pressure environment of 0.1 to 0.3 MPa in a dynamically sealed continuous rotary kiln, the volatilization loss of isocyanate (HNCO) is suppressed from a physical process perspective. This reduces the degree of escape of volatile isocyanate (HNCO) during pyrolysis and promotes its further reaction with the solid matrix (alkaline earth metal oxide matrix), thereby improving the raw material utilization rate and dicyandiamide yield. In particular, when the pressure in the dynamically sealed continuous rotary kiln is 0.2 MPa, the yield of the obtained dicyandiamide is 93.5% while maintaining a purity of 99.88%.

The invention provides an epoxy insulating material for a mutual inductor and a preparation method of the epoxy insulating material, and the epoxy insulating material comprises the following raw materials in parts by mass: 100 parts of epoxy resin, 30-60 parts of modified aluminum oxide, 80-85 parts of an anhydride curing agent and 0.3-0.5 part of a curing accelerator, the modified aluminum oxide comprises an aluminum oxide matrix and a ureido organic silicon structure on the surface of the aluminum oxide matrix; the modified aluminum oxide is also modified by a silane modifier, and the silane modifier comprises fluorine-containing silane. The obtained epoxy insulating material has relatively high breakdown strength and electrical performance stability, can still keep good electrical insulating performance in a complex environment, and is suitable for insulating packaging and structural support of electrical equipment such as a mutual inductor and the like.

The invention relates to the technical field of gas sensing, in particular to a synergistic metal-polyphenol network nanocomposite as well as a preparation method and application thereof. According to the method, WO3, SnO2, In2O3 or ZnO is used as a nano oxide matrix, a'metal-polyphenol network 'is constructed by using plant polyphenol with'molecular glue' amphipathicity, loading of a single-layer or multi-layer'metal-polyphenol network 'on the surface of the matrix is realized in a customized manner, metal ions are reduced into metal nanoparticles in situ, and the metal nanoparticles are uniformly anchored on the surface of the matrix to form an intermediate; and finally, performing thermal treatment in an inert atmosphere to carbonize the polyphenol to form an ultrathin carbon layer, thereby obtaining the carbon-coated synergistic metal-polyphenol network nano composite material. According to the method, uniform dispersion and stable anchoring of the active metal are achieved, particle aggregation caused by Ostwald curing is effectively inhibited, the synthesis process is environmentally friendly, and the sensing performance of the material can be directionally optimized. When the material is used for preparing a hydrogen sensor, high sensitivity, high selectivity and high durability are shown.

The invention belongs to the related technical field of batteries, and particularly relates to a perovskite material and a preparation method thereof, and a solid oxide electrolytic tank and a cathode thereof. According to the preparation method of the perovskite material provided by the invention, through high-temperature annealing and reducing atmosphere heat treatment, CeO2 nanocrystals and transition metal nanoparticles are sequentially subjected to in-situ precipitation on a perovskite oxide, so that a heterostructure of a CeO2-transition metal nanoparticle catalyst with thermodynamic stability is formed. Compared with an impregnation method and an in-situ precipitation method, the CeO2-transition metal nanoparticles obtained by the in-situ precipitation method are uniformly distributed on a perovskite oxide matrix and have a very good nesting effect with the matrix, the micro-nano structure is more stable, the phenomenon of performance reduction caused by particle aggregation in the operation process of the cell can be effectively prevented, and the performance of the cell is improved. And the innovative CeO2-transition metal nanoparticle catalyst is introduced, so that the catalytic activity of the electrode material and the overall performance of the electrolytic tank can be greatly improved.

This invention relates to a method for activating a catalyst comprising at least one metal element selected from elements of Groups 3, 4, and 5 of the periodic table and an oxide matrix, particularly a catalyst having 3% by weight tantalum on silica beads, the method comprising: a) preparing an activation composition comprising at least one polyfunctionalized carboxylic acid compound (e.g., lactic acid) such that the activation composition has a carboxylic acid / metal molar ratio greater than or equal to 2 between the molar number of the at least one polyfunctionalized carboxylic acid compound and the molar number of the at least one metal element in the catalyst; b) contacting the activation composition with the catalyst to obtain an impregnated intermediate solid; and c) performing an activation phase on the impregnated intermediate solid at temperatures greater than 100°C and less than 300°C to perform a heat treatment.

A coated component and a method of forming the same are provided. The coated component includes a silicon-containing substrate having a surface, a bond coat on the surface of the silicon-containing substrate, and an environmental barrier coating on the bond coat. The bond coat includes a silicon-based matrix having a dispersion of reinforcing phase therein. Upon oxidation of the bond coat, a TGO layer is formed, the TGO layer including a dispersion of alumino-silicate based crystals in a silicate-based oxide matrix.

The quantum bit material of the present disclosure includes a host material of an oxide containing a first element and a second element, or of an oxide containing the second element, a third element, and a fourth element. The host material includes a dopant element. The dopant element is a lanthanide element. The first element is an element of any one of groups 1 to 14. The second element is an element of any one of groups 14 to 17. The third and fourth elements are elements of any one of groups 1, 2, and 4 to 14, lanthanide elements other than the dopant element, or actinoid elements.

There is provided a photonics device including: a doped material including an oxide host hosting a system of ytterbium oxide and network modifiers, containing above 0.5×1026 ions / m3 of ytterbium; a laser pump directed to the doped material; and the lifetime of an excited state of the ytterbium in response to the laser pump is of above 0.9 ms and a phonon energy of the host material is above 1000 cm−1.

The present invention relates to a metallic nanoparticle catalyst, and more particularly, to a porous catalyst in which metallic nanoparticles are embedded in a porous oxide support, and a method for preparing the porous catalyst. To this end, a porous catalyst composition having metallic nanoparticles of the present invention includes an oxide matrix structure having mesopores and micropores; and metal or metal oxide nanoparticles embedded in the oxide matrix structure having the mesopores and micropores. Thus, metallic nanoparticle catalysts having high activity even at low temperature are realized.

The invention belongs to the technical field of luminescent materials, and discloses a high-performance red fluorescence temperature measurement material, a preparation method and application thereof, and a temperature measurement method of an oxide matrix. The chemical composition of the red fluorescent material is Mg < 14 > Ge < 5-x > O24: xMn < 4 + >, 0 lt, and x is less than or equal to 0.15. According to the material, Ge < 4 + > is equivalently replaced by Mn < 4 + > to occupy an octahedral position, and a model based on a Stokes and anti-Stokes luminous intensity ratio is established in an oxide matrix, so that emission peaks of multiple coupling vibration modes can be used in the oxide matrix for multiple times of temperature measurement and comparison research, and the material has excellent temperature sensing performance and can be widely applied to the field of temperature measurement. And a new temperature measurement research thought is provided for the oxide matrix fluorescent powder.

The present invention relates to a process for the preparation of a catalyst, said process comprising: a) a step of preparing an organic solution comprising: a metal precursor of a metal element selected from the elements of groups 3, 4 and 5 of the periodic table, such as tantalum and zirconium, and an additive, wherein said metal precursor and said additive are present in the organic solution in such amounts that the additive / metal molar ratio is greater than 2; b) a step of depositing said metal precursor onto an oxide substrate by contacting said organic solution with said oxide substrate; followed by c) a heat treatment step. The present invention also relates to the catalyst obtained and its use for the conversion of a feedstock comprising ethanol into butadiene.

The invention discloses a bimetallic oxyhydroxide catalyst for enhancing desorption of a CO2-rich alcohol amine solution as well as a preparation method and application of the bimetallic oxyhydroxide catalyst. The preparation method comprises the following steps: dissolving Zn, In and Ga as metal doping elements in deionized water according to the molar ratio of Zn, In and Ga to Al of (0.01-0.5): 1 to form a mixed salt solution; the preparation method comprises the following steps: adding urea according to a ratio of the total molar weight of Zn element and Al element to the molar weight of urea of (0.5-2): 1 while stirring at room temperature, carrying out condensation reflux reaction at 90-150 DEG C for 6-10 hours, aging for 8-12 hours to obtain gel, and freeze-drying for 8-12 hours to obtain the bimetallic oxyhydroxide. By introducing specific metals such as Zn, In and Ga to perform lattice-level doping modification on an aluminum hydroxide main body, cooperative regulation and control on an electronic structure and surface properties of the aluminum hydroxide main body are realized, so that the catalytic desorption activity of the aluminum hydroxide main body on carbamate / bicarbonate in a CO2-rich alcohol amine solution is remarkably improved; the regeneration energy consumption of the CO2-rich alcohol amine solution is greatly reduced, the desorption efficiency is synchronously improved, and the method has an important application value in an industrial carbon capture process.

The invention discloses a PtPd monatomic alloy sensitized oxide gas sensitive material, a preparation method and a hydrogen sensor, and belongs to the technical field of gas sensing. The gas sensitive material comprises a metal oxide matrix and a Pt1Pd monatomic alloy active component loaded on the surface of the metal oxide matrix, wherein Pt atoms are embedded into Pd crystal lattices in a monatomic form to form a stable alloy structure. The preparation method comprises the following steps: carrying out surface hydroxylation treatment on the carrier; mixing a platinum source, a palladium source and a coordination agent to form a platinum-palladium mixed metal complex; and reacting the functionalized carrier with a complex solution in a reducing environment, so that platinum and palladium are loaded on the surface of the carrier in situ in a monatomic alloy form. According to the material, the electronic structure of Pd active sites is optimized through a monatomic electron regulation mechanism, and the hydrogen response rate and the CO poisoning resistance are remarkably improved. The hydrogen detection limit of the prepared sensor at 191 DEG C reaches 21ppb, the response / recovery time is 0.8 s / 5.9 s, the response fluctuation within the humidity range of 30%-90% is smaller than + / -5%, and high sensitivity, excellent selectivity and long-term stability are shown.

The application relates to the technical field of solar cells, and provides a solar cell, a preparation method of the solar cell, a laminated cell and a photovoltaic module. The solar cell comprises a passivation layer and an anti-reflection layer which are arranged in layers, the passivation layer comprises an aluminum oxide matrix and diamond particles distributed in the aluminum oxide matrix, and the anti-reflection layer comprises silicon nitride. The solar cell provided by the application can solve the problem of film explosion in the metallization sintering process and improve the efficiency of the solar cell.

A method is provided for preparing a ceramic matrix composite (CMC) having a matrix with a SiC matrix phase and an oxide matrix phase. In one process embodiment, a CMC preform containing fiber tows to chemical vapor infiltration of SiC to form a SiC matrix phase. A metal oxide layer is then deposited on surfaces of the SiC matrix phase by atomic layer deposition. The resultant preform is then subjected to slurry infiltration to introduce ceramic particles, e.g., an alumina powder, to fill void spaces in the preform. The CMC preform is then subjected to melt infiltration by a molten metal oxide. The melt infiltrated CMC preform is subjected to one or more heat treatments to react the molten oxide and powder(s) and form a crystalline oxide matrix phase.

The present invention relates to composite particles comprising nanoparticles dispersed in a metal oxide matrix comprising alumina and zirconia.