109 results about "Oxide matrix" patented technology

The present disclosure relates to non-flexible composite insulation materials comprising a metal oxide matrix reinforced with a fibrous material embedded therein. Specifically, the present disclosure relates to use of the non-flexible composite insulation materials for thermal batteries and the like. The non-flexible composite insulation materials with low thermal conductivity provided herein is capable of meeting the mechanical requirements for thermal battery design yet provides improved handleability compared to the commercially available insulators.

The invention belongs to the technical field of low-temperature HIB steel, and particularly relates to modified magnesium oxide and a preparation method and application thereof. The modified magnesium oxide provided by the invention comprises a magnesium oxide matrix as well as calcium oxide and vinyl silane which are adsorbed on the surface of the magnesium oxide matrix, the 40% CAA of the magnesium oxide matrix is 60-70 s, and the 70% CAA of the magnesium oxide matrix is 125-145 s. Calcium oxide is introduced into silicon steel grade magnesium oxide, so that the alkalinity of modified magnesium oxide is further improved; under the combined action of calcium oxide and vinyl silane, the reaction activity of modified magnesium oxide and silicon dioxide on the surface of a silicon steel sheet is improved, 70% CAA seconds are reduced under the condition that 40% CAA activity seconds are not changed, the synthesis capacity of a magnesium silicate bottom layer is improved, and the uniformity and surface quality of the magnesium silicate bottom layer synthesized by low-temperature HIB steel are improved; therefore, the properties of iron loss and magnetic induction intensity of the low-temperature HIB steel are ensured.

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 relates to the technical field of sodium ion battery positive electrode materials, in particular to a high-voltage positive electrode material, a preparation method thereof, a positive electrode plate and a sodium ion battery. The high-voltage positive electrode material comprises an O3-phase layered oxide matrix material and a coating layer coating the surface of the O3-phase layered oxide matrix material, the chemical formula of the O3-phase layered oxide base material is NaaNixAyMnpGqO2, A comprises a metal element with the valence of + 2 and / or + 3, and G comprises a metal element with the valence of + 4; and modification elements in the coating layer comprise at least one of Al, B, Ca, Co, Ce, La, Mg, Mo, Nb, Sr, Sn, W, Y, Zr, Zn, Bi and Ti. The material has reversible phase change under high voltage, can work under high voltage, and has excellent cycle performance.

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

The invention discloses a sodium ion battery positive electrode material with high cycle performance and a preparation method of the sodium ion battery positive electrode material. According to the sodium ion battery positive electrode material, magnesium, titanium, nickel and aluminum are doped in a layered transition metal oxide matrix, so that the electrochemical performance of the material can be optimized; wherein the doping of magnesium and titanium improves the structural stability and thermal stability of the material, the introduction of nickel enhances the conductivity, the doping of aluminum reduces the volume change of the material, and the rate capability and cycling stability of the material are effectively improved; meanwhile, corrosion and side reaction of electrolyte are further reduced through surface coating of the conductive polymer, the service life of the battery is remarkably prolonged, the cycle performance of the battery is remarkably improved, and particularly, a good capacity retention rate can be kept under the high-rate charge-discharge condition.

The invention discloses a preparation method of microcosmic-macroscopic prestress synergistically enhanced aluminum oxide ceramic and a product of the microcosmic-macroscopic prestress synergistically enhanced aluminum oxide ceramic. Low-shrinkage mineral kyanite particles are utilized on the surface of an aluminum oxide matrix, so that the surface layer of the matrix is subjected to microcosmic compressive stress, and the matrix is strengthened for the first meanwhile, the matrix is secondarily strengthened by wrapping type compact constraint macroscopic compressive stress on the surface layer of the matrix, so that the microcosmic-macroscopic residual compressive stress is synergistically enhanced, and the composite reinforced aluminum oxide ceramic consisting of the aluminum oxide matrix as well as the ion exchange-like layer and the prestressed coating on the surface of the matrix is formed; the breaking strength of the aluminum oxide ceramic is obviously improved, and the service life is prolonged.

The invention relates to the technical field of high-performance composite materials, and provides a frequency band magnetic control adjustable one-dimensional nanotube composite wave-absorbing material and a preparation method thereof.The material is composed of a one-dimensional tubular ferroferric oxide matrix and manganous-manganic oxide wrapping the outer side of the matrix, and directional arrangement is conducted through magnetic control rotation. The preparation method comprises the following steps: preparing an iron oxyhydroxide precursor through a hydrothermal synthesis method; the preparation method comprises the following steps: reducing an iron oxyhydroxide precursor by a liquid-phase pyrolysis method, and coating a manganous-manganic oxide shell layer in situ at the same time, so as to obtain a nanotube ferroferric oxide / manganous-manganic oxide composite material; and carrying out orientation arrangement on the nanotube-shaped ferroferric oxide / manganous-manganic oxide composite material through magnetic field control. According to the preparation method and the structural design, the yield, the uniformity, the magnetic performance, the electromagnetic wave absorption efficiency, the multi-band electromagnetic loss enhancement and the like of the material are remarkably improved.

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 a sodium ion positive electrode material and a preparation method thereof. The sodium ion positive electrode material comprises a layered oxide NaxMyNzTiON and phosphonic acid molecules coating the surface of the layered oxide, the mass of the phosphonic acid molecules accounts for 1-5% of the mass of the layered oxide matrix Na < x > M < y > N < z > TiON; wherein M, N and T are different types of metal elements and are selected from one or more of Ni, Fe, Mn, Li, Ca, Al, Mg, Zr, Nb, Ta, Ti, Sn, Co and Cu; 0.66 < = x < 1.1, 0 < = y < = 1, 0 < = z < = 1, 0 < = i < = 1, y + z + i = 1, 1.85 lt; nlt; 2.15, 2.15; the values of x, y, z, i and n meet the charge balance of the chemical formula. According to the sodium ion positive electrode material, the chemical stability of a layered oxide material in ambient air can be remarkably improved, so that the electrochemical performance of the sodium ion positive electrode material is maintained.

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 invention discloses a modified cobaltosic oxide precursor material and a preparation method and application thereof, and relates to the technical field of lithium ion batteries, the modified cobaltosic oxide precursor material comprises a cobaltosic oxide matrix, and a nickel element and a manganese element doped in the cobaltosic oxide matrix; wherein in metal elements of the modified cobaltosic oxide precursor material, the molar ratio of a nickel element is 5%-20%, the molar ratio of a manganese element is 1%-3%, the molar ratio of an aluminum element is 0.8%-3%, the D50 particle size of the modified cobaltosic oxide precursor material is 15-20 microns, the specific surface area of the modified cobaltosic oxide precursor material is 3-5 m < 2 > / g, and the particle size distribution width SPAN value of the modified cobaltosic oxide precursor material is 0.2-0.4. The precursor has the advantages of uniform particle size, no cracking on the particle surface and the like, and the lithium cobalt oxide positive electrode material prepared from the precursor material has excellent cycle stability and cycle life.

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 composite particle comprising nanoparticles dispersed in a metal oxide matrix comprising alumina and zirconia.

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 application discloses a nitrogen oxygen sensor chip with an independently designed pump unit, including a substrate, wherein the substrate is composed of a multi-layer aluminum oxide substrate and a multi-layer zirconium oxide substrate stacked in sequence. The multi-layer aluminum oxide substrate includes aluminum oxide substrate one, aluminum oxide substrate two, aluminum oxide substrate three and aluminum oxide substrate four, and the multi-layer zirconium oxide substrate includes zirconium oxide substrate one, zirconium oxide substrate two and zirconium oxide substrate three. By adopting the above-mentioned nitrogen oxygen sensor chip with an independently designed pump unit, the pump oxygen units of the nitrogen oxygen sensor are separated from each other, which can improve the accuracy of the product, especially reduce the influence of oxygen content on nitrogen oxygen content determination when the oxygen content changes drastically, and greatly shorten the chip size, while improving performance and reducing costs.

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.