87 results about "Oxide matrix" patented technology

The invention discloses a high-stability layered oxide sodium-ion battery positive electrode material and a preparation method thereof.The high-stability layered oxide sodium-ion battery positive electrode material comprises a layered oxide matrix and a surface coating layer, a sodium source, a nickel source, a manganese source, a lithium source and a magnesium source are mixed according to the stoichiometric ratio, a pre-sintered product is heated to 850-950 DEG C at the speed of 0.5-2 DEG C / min to be calcined, and the high-stability layered oxide sodium-ion battery positive electrode material is obtained. The calcined product, lithium phosphate and aluminum nitrate are subjected to ball milling and mixing in a citric acid solution with the pH value of 3-5 according to the mass ratio of 1: (0.005-0.03): (0.002-0.02), and the capacity retention ratio of the battery is larger than or equal to 88% after 500 times of circulation under the voltage range of 2.0-4.0 V and the multiplying power of 0.5 C. The comprehensive protection from the bulk phase to the interface is realized by triple doping and gradient coating, and the cycle life is prolonged by two times. Interlayer spacing expansion and coating layer ion conduction cooperate to reduce polarization, and the applicable temperature range is widened to-30 DEG C to 60 DEG C. Seed crystal induction and segmented sintering ensure batch consistency, and the method is suitable for large-scale production. Cheap Fe / Mn is adopted to replace part of Ni, and the material cost is reduced by 40% compared with similar products.

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.

The present invention relates to the technical field of microwave heating, and particularly relates to a zinc oxide or zinc oxide-based microwave heating material, a preparation method thereof, and an application thereof in microwave treatment of carbon-containing materials. The present invention synthesizes the microwave heating material zinc oxide by a simple method, and uses a zinc oxide matrix by screening a suitable preparation method, and constructs a zinc oxide-based composite material with a micro-nano structural morphology of needles, petals and rods by using a modifier, so as to effectively improve the microwave heating efficiency of a variety of inorganic metals or non-metallic materials with poor microwave transparency or heating effect, and realize its application in the microwave treatment process of carbon-containing materials. In addition, the method of the present invention can also realize various morphologies of the microwave heating material by adjusting the ratio and synthesis method between the components. The method of the present invention has a simple process, cheap and easily available raw materials, and is more conducive to industrial production.

The present invention relates to a method for preparing a catalyst, comprising: a) a step of preparing an acidified organic solution comprising: a metal precursor of a metallic element chosen from the elements of groups 3, 4 and 5 of the periodic table, a multifunctionalized ketone additive, said metal precursor and said multifunctionalized ketone additive being present in the acidified organic solution in amounts such that the additive / metal molar ratio is greater than or equal to 1; b) a step of depositing said metal precursor on an oxide matrix, by bringing the acidified organic solution into contact with said oxide matrix; then c) a heat treatment step. The present invention also relates to the catalyst obtained and its use for converting a feedstock comprising ethanol into butadiene.

The present invention relates to a method for preparing a catalyst, comprising: a) a step of preparing an organic solution comprising: a metal precursor of a metal element chosen from the elements of groups 3, 4 and 5 of the periodic table, a multifunctionalized ester additive, comprising an ester function and at least one second chemical function in the beta position, said metal precursor and said multifunctionalized ester additive being present in the organic solution in amounts such that the additive / metal molar ratio is greater than or equal to 1; b) a step of depositing said metal precursor on an oxide matrix, by bringing the organic solution into contact with said oxide matrix; then c) a heat treatment step. The present invention also relates to the catalyst obtained and its use for converting a feedstock comprising ethanol into butadiene.

The present invention relates to a method for activating a catalyst comprising at least one metal element chosen from the elements of groups 3, 4 and 5 of the periodic table such as tantalum, and an oxide matrix, the method comprising: • a) preparing an activation composition comprising at least one monofunctional carboxylic acid, such that the acid / metal molar ratio between the number of moles of the at least one monofunctional carboxylic acid and the number of moles of the at least one metal element of the catalyst is greater than or equal to 2; • b) placing the activation composition in contact with the catalyst, in order to obtain an impregnated intermediate solid; and • c) thermally treating the impregnated intermediate solid, by implementing an activation phase at a temperature higher than 100°C and lower than 300°C.

The present invention relates to a method for preparing a catalyst, comprising: • a) a step of preparing an aqueous impregnation solution comprising: • a metal precursor of a metal element chosen from the elements of groups 3, 4 and 5 of the periodic table such as tantalum, • at least one multifunctional acid additive, comprising a carboxylic acid or ester function and at least one second chemical function in the alpha or beta position, and • an aqueous solvent; the metal precursor and the multifunctional acid additive being present in the aqueous solution in amounts such that the additive / metal molar ratio is greater than or equal to 5; • b) a step of depositing the metal precursor on an oxide matrix, by placing the aqueous solution in contact with the oxide matrix; and then • c) a thermal treatment step. The present invention also relates to the catalyst obtained and to the use thereof for converting a feedstock comprising ethanol into butadiene.

The present invention relates to a method for activating a catalyst comprising at least one metallic element chosen from the elements of groups 3, 4 and 5 of the periodic table, and an oxide matrix, said method comprising: a) a step of preparing an activation composition comprising at least one multifunctionalized acid compound, such that the activation composition has an acid / metal molar ratio between the number of moles of said at least one multifunctionalized acid compound and the number of moles of said at least one metallic element of the catalyst greater than or equal to 2; b) a step of bringing the activation composition into contact with said catalyst, to obtain an impregnated intermediate solid, c) a step of heat treatment of the impregnated intermediate solid, implementing an activation phase at a temperature greater than 100°C and less than 300°C.

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 invention relates to a method for preparing a catalyst, comprising: a) a step of preparing an aqueous impregnation solution comprising: a metal precursor of a metal element chosen from the elements of groups 3, 4 and 5 of the periodic table, at least one multifunctionalized acid additive, comprising a carboxylic acid or ester function, and at least one second chemical function in alpha or beta position, and an aqueous solvent, said metal precursor and said multifunctionalized acid additive being present in the aqueous solution in amounts such that the additive / metal molar ratio is greater than or equal to 5; b) a step of depositing said metal precursor on an oxide matrix, by bringing the aqueous solution into contact with said oxide matrix; then c) a heat treatment step.The present invention also relates to the catalyst obtained and its use for converting a feedstock comprising ethanol into butadiene.

The invention belongs to the technical field of catalyst carriers, and particularly relates to a modified alumina carrier and a preparation method and application thereof, the modified alumina carrier comprises a modified alumina matrix and a carbon layer coating the surface of the modified alumina matrix; the mass of the carbon layer is 10-20% of the mass of the modified aluminum oxide matrix; the modified aluminum oxide matrix is prepared from the following components in percentage by mass: 1.5 to 3 percent of tin oxide, 8 to 11 percent of alkaline earth metal oxide and the balance of gamma-Al2O3. The mechanical strength and electron conductivity of the modified alumina carrier are increased by doping tin oxide and alkaline earth metal oxide, the specific surface area of the modified alumina carrier is increased by the carbon layer coating the surface of the modified alumina matrix, and the conductive network structure formed by the carbon layer has good conductivity. The electron conductivity of the modified aluminum oxide carrier is further improved.

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 present invention provides a heating component and a method for manufacturing the same, a cooking utensil, and a cooking device. The heating component includes a first inorganic layer; a heating layer disposed on a surface of the first inorganic layer; the heating layer contains metal particles and an oxide matrix; and a second inorganic layer disposed on a surface of the heating layer away from the first inorganic layer, wherein the heating layer includes a first region, within which the metal particles are concentrated in a region of the first region that is away from the first inorganic layer and the second inorganic layer, and the oxide matrix is ​​concentrated in regions on both sides of the first region that are close to the first inorganic layer and the second inorganic layer. The heating component has high heating efficiency, good heating effect, high safety, and can improve the overall mechanical properties of the heating component.

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 present invention relates to a method for preparing a catalyst, comprising: a) a step of preparing an organic solution comprising: a metallic precursor of a metallic element chosen from the elements of groups 3, 4 and 5 of the periodic table, an organic solvent comprising a mono-alcohol; b) a step of bringing the organic solution into contact with an oxide matrix having a pore volume, in the presence of a carboxylic acid, said carboxylic acid being present in the organic solution and / or in the pore volume of the oxide matrix; then c) a heat treatment step. The present invention also relates to the catalyst obtained and its use for converting a feedstock comprising ethanol into butadiene.

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.

The present invention relates to a method for preparing a catalyst, comprising: • a) a step of preparing an organic solution comprising: • a metal precursor of a metal element chosen from the elements of groups 3, 4 and 5 of the periodic table such as tantalum, and • a multifunctional ester additive, comprising an ester function and at least one second chemical function in beta position such as ethyl 2-oxocyclopentanecarboxylate; the metal precursor and the multifunctional ester additive being present in the organic solution in amounts such that the additive / metal molar ratio is greater than or equal to 1; • b) a step of depositing the metal precursor on an oxide matrix, by placing the organic solution in contact with the oxide matrix; and then • c) a thermal treatment step. The present invention also relates to the catalyst obtained and to the use thereof for converting a feedstock comprising ethanol into butadiene.

The present invention discloses a supported alloy catalyst based on the interaction between a metal and a support, and a preparation method and application thereof. In the present invention, a metal A oxide support, an active metal precursor, and a metal A precursor are dispersed in water to obtain a dispersion liquid, and then an aqueous solution containing a precipitating agent is added, followed by heating and reacting, and then centrifugation or filtration, drying, and reduction heat treatment are carried out to obtain the supported alloy catalyst. The catalyst of the present invention includes an active metal phase and an oxide matrix phase, and the active metal phase is dispersed in the form of nanoparticles on the surface of the oxide matrix phase. The present invention provides a highly efficient and stable supported alloy catalyst prepared by a method based on modulating the interaction between a metal and a support. The method has easily available raw materials, simple operation, and is convenient for mass production. The prepared catalyst is applied to the N2H4·H2O catalytic decomposition hydrogen production system, has both rich active sites and good mass transfer characteristics, and can efficiently and stably catalyze the decomposition of N2H4·H2O to produce hydrogen under near room temperature conditions.

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 present invention relates to a method for preparing a catalyst, comprising: a) a step of preparing an organic solution comprising: a metal precursor of a metal element chosen from the elements of groups 3, 4 and 5 of the periodic table, an acid additive chosen from hydrogen halides, hydrogen halide precursors, and mixtures thereof, and an organic solvent, said at least one metal precursor and said at least one acid additive being present in the organic solution, at an acid / metal molar ratio between the number of moles of hydrogen halide equivalent and the number of moles of the metal element is greater than or equal to 1; b) a step of depositing said metal precursor on an oxide matrix, by bringing the organic solution into contact with said oxide matrix; then c) a heat treatment step.The present invention also relates to the catalyst obtained and its use for converting a feedstock comprising ethanol into butadiene.

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.

The present invention discloses a magnesium-based thermochemical energy storage material and a preparation method thereof. The magnesium-based thermochemical energy storage material comprises a magnesium oxide matrix and a dopant loaded on the magnesium oxide matrix. The microstructure of the magnesium-based thermochemical energy storage material is a nanoscale petal-like lamella, and the dopant is a nitrate. The preparation method of the magnesium-based thermochemical energy storage material comprises the following steps: S1: Stir and mix a magnesium precursor solution and a carbonate solution, filter after reaction; S2: Stir and mix a nitrate solution with the filtration product of step S1, and dry the mixture; S3: Place the dried mixture in step S2 into a high-temperature furnace for calcination. The present invention directly prepares a nitrate-modified magnesium oxide-based thermochemical energy storage material from a magnesium precursor by a one-step calcination method, reduces the preparation steps, lowers the cost, improves the MgO carbonation rate, and enhances the cycle stability.

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%.