37 results about "Oxide matrix" patented technology

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.

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.

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.

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.

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 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.

The invention relates to the technical field of gas sensitive materials, in particular to an indium oxide and cobalt oxide composite material as well as a preparation method and application thereof. In the indium oxide and cobalt oxide composite material, indium oxide is a matrix of the composite material, the indium oxide matrix is self-assembled into a three-dimensional nano flower shape by two-dimensional nano indium oxide sheets, and cobalt oxide is dispersed on the surface of the indium oxide in a nano-particle form. According to the composite material provided by the invention, uniform loading of a nanoscale cobalt oxide component on indium oxide is realized by utilizing a unique morphological structure of the composite material and utilizing hydrothermal synthesis and dipping annealing processes, high oxygen activity of the cobalt oxide component and a heterogeneous interface effect between indium oxide and cobalt oxide are effectively utilized, and the surface dispersion amount of cobalt oxide is regulated and controlled, so that the surface dispersion amount of indium oxide is regulated and controlled; and the gas adsorption site is changed, so that selectively adjustable NO2 and TEA detection is realized.

The invention belongs to the technical field of catalysis, and relates to a cation defect type high-entropy oxide catalyst as well as a preparation method and application thereof. Specific metal elements (Mn, Ce, Pr, Zr and Nd) are used for constructing a stable high-entropy oxide matrix, and Mn cation defects are directionally generated through a weak acid selective etching strategy on the basis of the property difference between Mn and other quaternary metals in the system. The prepared cation defect type high-entropy oxide catalyst still keeps efficient and stable in an industrial flue gas environment with low temperature (150-200 DEG C) and high humidity (containing 5-10 vol% of water vapor) and shows a water promotion effect in wet flue gas, the activity of the catalyst is not inhibited by introduction of the water vapor, the removal efficiency of VOCs is improved, and the cation defect type high-entropy oxide catalyst has a good industrial application prospect. The preparation process is simple, the used reagent is environment-friendly, and the requirements of green chemistry and sustainable development are met.

Coating, comprehensive: a layer comprising an aluminum oxide matrix and at least one of zirconium oxide grains and hafnium oxide grains in the aluminum oxide matrix, wherein a mean grain size of the at least one of the zirconium oxide grains and the hafnium oxide grains is 100 nm or less, characterized in that the at least one of the zirconium oxide grains and the hafnium oxide grains is primarily arranged within grains of the aluminum oxide matrix.

This invention relates to the field of sodium-ion battery cathode materials technology, and discloses the preparation and application of hydrophobically modified sodium-ion battery layered oxides. The process includes preparing a layered oxide matrix by mixing sodium, iron, nickel, and manganese sources at high speed and then sintering at high temperature, followed by pulverizing and sieving to obtain the matrix; organic acid etching by dissolving an organic acid in an alcohol-based solvent to prepare an etching solution, adding it to the matrix, stirring in a water bath at 40-50°C, and filtering and washing to obtain etched layered oxides; and hydrophobic coating by dispersing the etched oxides into a suspension, mixing and stirring it with an alcohol-based solution of a low surface energy material, filtering, washing, and drying to obtain hydrophobically modified sodium-ion battery layered oxides. This invention solves the problems of insufficient hydrophobicity and low mechanical strength of existing hydrophobically modified materials by constructing micro / nano structures through organic acid etching and then coating them with low surface energy materials. It also reduces residual alkali on the material surface and improves air stability. Suitable for large-scale production, the resulting material, as a cathode material for sodium-ion batteries, can effectively improve the overall electrochemical performance of the battery.

The invention relates to the technical field of lithium ion battery materials, and discloses a positive electrode material, a preparation method thereof and a lithium ion battery. The positive electrode material comprises a bulk phase and a coating layer, the bulk phase comprises a nickel-rich layered oxide matrix containing lithium, zirconium, boron and aluminum, a doping element A, an optional doping element D and a doping element E; the weighted average valences of the doping element A, the doping element D and the doping element E meet the condition that [sigma (nA * dA) + sigma (nD * dD) + sigma (nE * dE)] / (sigma nA + sigma nD + sigma nE) is greater than or equal to 2.5 and less than or equal to 4.5; the coating layer comprises a low-temperature coating layer and a high-temperature coating layer which are sequentially arranged from inside to outside; and the positive electrode material meets the condition that e-strain * IA104 / IA0122 is greater than or equal to 0.2. The positive electrode material has excellent structural stability and mechanical stability under harsh conditions of high temperature and high voltage, and further has excellent cycle performance and safety performance.

This invention discloses a double-layer coated layered oxide cathode material for sodium-ion batteries. The material comprises a layered oxide matrix and a double-layer coating layer covering the surface of the matrix. The layered oxide matrix is ​​doped with Ti. The double-layer coating layer comprises an inner coating layer and an outer coating layer. The inner coating layer comprises Na₂Ti₃O₇, and the outer coating layer comprises TiO₂. This sodium-ion battery layered oxide cathode material exhibits high rate capability and low damping coefficient (DCR) growth performance.

The invention relates to a surface-coated and bulk-phase fluorine-doped layered oxide positive electrode active material and a preparation method and application thereof, and the positive electrode active material comprises a fluorine-doped layered transition metal oxide matrix and a coating layer coating the surface of the matrix, the preparation method comprises the following steps: taking hydroxide and / or carbonate of transition metal as a precursor, mixing the precursor with an alkali metal source, phosphate and fluoride according to a stoichiometric ratio, and carrying out uniform ball milling to obtain a solid-phase mixture; and sintering the solid-phase mixture in an oxygen-containing atmosphere, and carrying out a solid-phase reaction to obtain the positive electrode active material. Coating and doping of the layered oxide matrix are achieved through a one-step method, the structural stability of the positive electrode active material is effectively improved, the technological process is simple, the cost is low, and the method is suitable for large-scale preparation and industrial application.

The present invention relates to a method for producing a luminescent inorganic material based on an oxyfluoride matrix doped with multiple combinations of rare-earth ions (ytterbium (Yb), erbium (Er), thulium (Tm), europium (Eu) and neodymium (Nd)), and which contains micro- and nanostructured phases obtained using a thermal treatment. Advantageously, the material obtained using the method of the present invention generates a luminescence pattern with simultaneous emission in the near infrared spectrum and in the visible spectrum under 980 nm infrared excitation, which enables the material to be used in anti-counterfeiting security devices, such as security inks for printing textiles, paper money or printed circuits, among others.