1224 results about "Aluminum nitrate" patented technology

A substrate-holding apparatus for holding a semiconductor substrate in a semiconductor processor is characterized in that the apparatus includes a mount block made of, e.g., aluminum nitrate with a high-frequency electrode embedded therein and a heating block made of, e.g., an aluminum alloy with a heating body embedded therein. The mount block is tightly attached to the heating block by engaging the bottom surface of the mount block with the top surface of the heating block, for example, by using a latching mechanism.

A carbon dioxide-synthesized methanol catalyst and a preparation method thereof are disclosed, belonging to the technical field of catalyst. The invention is characterized in that the carbon dioxide-synthesized methanol catalyst has the molar ratio of components of Ci to Zn to Al to Zr to M being 45 to 45 to 10 to 5 to 2, wherein M is MnO, CeO2, Ag2O, Fe2O3, La2O3, and is prepared by stepped co-deposition. The preparation steps are that: (1) a mixed liquid of aluminum nitrate solution and zirconium nitrate solution is in concurrent flow and co-deposition with carbonate solution to prepare a carrier precursor; (2) copper-zinc M mixed nitrate is in concurrent flow and co-deposition with the carbonate solution and added into (1), and then the synthesized methanol catalyst is prepared by aging, filtering, drying and roasting. The inventive effect and benefit are that the prepared catalyst is excellent in activity and thermal resistance and can effectively decompose carbon dioxide with high one-step conversion rate, therefore, the invention provides an effective catalyst for synthesizing methanol by hydrogenising the carbon dioxide.

The invention discloses a gahnitem, zinc oxide and nickel zinc nano-composite photocatalytic material which has a high specific surface area and a mesoporous structure and is prepared by roasting at high temperature by taking ternary hydrotalcite as a precursor. The material is used for the adsorption and the degradation of organic pollutants. The photocatalytic material is prepared by taking zinc nitrate, nickel nitrate, aluminum nitrate, sodium carbonate, sodium hydroxide and the like as raw materials; preparing the raw materials into salt solutions and alkali solutions respectively; mixing the solutions by using a constant-flow pump at the temperature of 80 DEGC with magnetic stirring, transferring the mixed solution into a hydrothermal reaction kettle; performing hydrothermal treatment at 130 to 180 DEG C; performing suction filtration, washing and drying to the precursor; roasting the precursor in Muffle furnace for 2 to 6 hours at the temperature of 400 to 600 DEG C to obtain the product, wherein the specific surface area is greater than 150 m<2>.g<-1>. The photocatalyst disclosed by the invention has regular shape, large specific surface area, and super-high capacity for adsorbing and degrading organics, and can be reused; the raw materials for preparing the composite photocatalyst are abundant, the cost is low, and the process is simple.

The preparation process of fraction oil hydrogenation treatment catalyst includes assistant adding modification of gamma-alumina precursor and subsequent conventional preparation process. The fraction oil hydrogenation treatment catalyst includes gamma-alumina precursoe prepared through carbonation process, aluminum nitrate process, aluminum sulfate process or aluminum chloride process; F an/or Bas assistant and W and Ni as active component. Compared with available technology, the present invention has the advantages of simple preparation process, low cost, low power consumption, and excellent catalyst performance. The catalyst of the present invention is suitable for hydrogenation treatment of 130-390 deg.c fraction oil.

The invention discloses a preparation method of an NASICON-type lithium ion solid electrolyte. The method comprises the following steps: dissolving lithium nitrate and aluminum nitrate in a citric acid solution, and stirring to form a transparent and uniform nitrate mixed solution; dissolving tetrabutyl titanate in anhydrous ethanol, and stirring to form an alcoholic solution of tetrabutyl titanate; slowly adding the alcoholic solution of tetrabutyl titanate to the nitrate mixed solution, and stirring to a transparent mixed solution; dissolving ammonium biphosphate in water to obtain a saturated aqueous solution of ammonium biphosphate, adding the saturated aqueous solution of ammonium biphosphate to the transparent mixed solution in a dropwise manner, and stirring to obtain an emulsion; adjusting the pH value of the emulsion, and drying the emulsion to obtain an xerogel; carrying out heat treatment of the xerogel, and grinding the obtained xerogel to form fine powder which is precursor powder; and compacting the precursor powder to form a green body, and sintering to obtain NASICON-type lithium ion solid electrolyte slices. The method has the advantages of low energy consumption, simplicity, easy implementation, and convenience for large-scale industrialized production, and the obtained solid electrolyte has a high conductivity.

The invention discloses a coal tar hydrodemetalization catalyst and a preparation method thereof. The method comprises the steps of: (1) taking or preparing an alumina carrier; (2) treating the alumina carrier from the step (1) with an organic acid solution with pH value lower than 3; then impregnating the alumina carrier subjected to acid treatment with an aluminium nitrate solution; and drying and roasting to obtain a modified alumina carrier; and (3) loading and hydrogenating an active component by an impregnation method to obtain the coal tar hydrodemetalation catalyst. Compared with the prior art, the coal tar hydrodemetalation catalyst provided by the invention has better activity and activity stability, and longer operation cycle.

The invention relates to a preparation method of alumina-coated hexagonal boron nitride composite powder for a self-lubricating cutter material. The preparation method comprises preparing a hexagonal boron nitride suspension liquid, carrying out ultrasonic dispersion, adding an aluminum nitrate solution into the suspension liquid, slowly and dropwisely adding ammoniacal liquor with pH of 6.5-8.5 into the suspension liquid, carrying out a reaction process at a temperature of 30-40 DEG C until the reaction liquid pH is in a range of 7.0-7.5, stopping ammoniacal liquor dropwise addition, carrying out reaction stirring for 1.5-2.5h, carrying out standing, carrying out deposition and filtration, carrying out centrifugation and washing, carrying out drying to obtain aluminum hydroxide-coated hexagonal boron nitride composite powder, and carrying out vacuum calcination to obtain the alumina-coated hexagonal boron nitride composite powder with the average particle size of 4-12 microns. Through use of the alumina-coated hexagonal boron nitride composite powder in a ceramic matrix, ceramic cutter mechanical properties are improved and self lubricating effects are obtained.

The invention discloses an alumina coating method of a lithium ion battery positive electrode material. The method comprises the following steps: adding ammonia water to a positive electrode material suspended aluminum nitrate solution in a dropwise manner to form a precipitate coated by Al(OH)3, and heating the precipitate in an air atmosphere muffle furnace to form an alumina coated positive electrode material. The coating method can improve the charge and discharge capacity of the lithium ion battery and prolong the cycle life.

The invention discloses a preparation method of a composite nanomaterial of a nano ZnO substrate and a graphene nanosheet. Nano ZnO and the graphene nanosheet are composited to form the composite nanomaterial in a sol-gel method and mechanical alloying combined mode, so that the preparation method is simple and easy to realize and short in reaction time; the finished composite nanomaterial is good in chemical stability; graphene has higher conductivity and can adjust an energy band structure of nano ZnO; nano ZnO has a higher seebeck coefficient, and the nano ZnO substrate and the graphene nanosheet are synthesized, so that interface scattering of phonons can be increased significantly; a recombination rate of an electron-hole pair can be reduced; the appearance of nano ZnO can be adjusted; the heat conductivity of nano ZnO can be reduced; and the photocatalytic efficiency of nano ZnO can be improved. Nitrate of to-be-doped ions comprises any one of aluminum nitrate, ferric nitrate, cobalt nitrate, nickel nitrate, silver nitrate and gold nitrate.

There is provided herein a system and method for treating source water to remove contaminants such as oil from oil-fields produced water. In some embodiments, source water containing CO₂, endotoxins, foulants, sulfate, and oxygen will be treated with aluminum nitrate or iron nitrate, separating the CO₂ and endotoxins from the treated water, removing the foulants by mixing hydrated lime and an amine solvent with the treated water, and separating the dissolved oxygen and recovering the amine solvent using a hydrophobic membrane.

The invention discloses a preparation method of an NASICON type lithium fast ion conductor. The preparation method comprises the following steps: adding butyl titanate into a citric acid solution, uniformly stirring the solution, adding a citric acid solution of lithium nitrate, aluminum nitrate and diammonium phosphate, uniformly stirring the solution and adding ethylene glycol, heating the solution to a certain temperature, and stirring the solution to completely gelatinize the same; drying the gel to obtain dry gel, and grinding and calcining the dry gel to obtain precursor powder; and grinding the precursor powder fine powder, carrying out isostatic press molding on the fine powder on a tablet press to obtain an electrolyte sheet of the NASICON type lithium fast ion conductor. The preparation method is used for reducing the sintering temperature of the material, perfecting the sintering performance of the material and improving the density of the material to improve the ionic conductivity of the material. The ionic conductivity of the NASICON type lithium fast ion conductor prepared by the preparation method reaches 6.34*10<-4> S/cm (25 DEG C), so that compared with a traditional preparation method, the ionic conductivity is significantly improved.

The invention relates to a sponge composite metallic organic framework material for adsorption separation and belongs to the technical field of materials. According to the invention, a two-step in-situ growth method is adopted for loading MOFs (metallic organic framework material) into a duct in a sponge carrier. The MOFs is synthesized from following organic ligands and metal salts, wherein the organic ligands include pyrazine, trimesic acid, terephthalic acid, 2,5-dihydroxyterephthalic acid, and the metal salts include cupric fluosilicate, magnesium nitrate, zirconium chloride, cupric nitrate, chromic nitrate, ferric nitrate, aluminum nitrate and hydrates thereof. According to a preparation method provided by the invention, a large amount of MOFs loaded in the duct in the sponge carriercan be realized; MOFs load rate is high; load is stable; the defects of fragility and easiness in loss of MOFs powder can be overcome; a breakthrough experiment proves that the material provided by the invention has the characteristics of high CO2-absorbing capacity, high adsorption separation selectivity, stable adsorption separation property, and the like.

The invention discloses an aluminum oxide coated nickel-cobalt-manganese ternary positive electrode material, a preparation method and application thereof. The preparation method of the material comprises the following steps: (1) dripping aluminum nitrate into ammonium hydroxide, reacting until precipitates are not increased any longer, adding citric acid and nitric acid, and preparing an AlOOH sol; (2) mixing a nickel-cobalt-manganese precursor and a lithium source uniformly, and sintering to obtain a nickel-cobalt-manganese ternary material; and (3) putting the nickel-cobalt-manganese ternary material into the AlOOH sol, carrying out calcinations after drying, and finally obtaining the aluminum oxide coated nickel-cobalt-manganese ternary positive electrode material. An aluminum oxide coating layer is coated on the surface of the nickel-cobalt-manganese ternary material, so that the amount of residual alkali on the surface of the material is reduced, a side reaction between the material and an electrolyte is inhibited effectively, and the safety performance of a battery is improved; moreover, in the battery prepared from the material, an Li-Al-Co-O protective layer is formed by the aluminum oxide coating layer during working on the surface of the material, and the protective layer can resist the corrosion of HF on active materials, so that the cycle performance of the batteryis improved.

The invention provides a carbonyl sulfide hydrolysis catalyst prepared by using Co-Ni-Al-like hydrotalcite as a precursor and a preparation method thereof. The preparation method comprises the following steps of: at room temperature, dissolving cobalt nitrate, nickel nitrate and aluminum nitrate in distilled water to prepare solution A, wherein the total metal molar number is 0.75mol, n(Co2+):n(Ni2+) is equal to 0.25 to 1, and n(Co2++Ni2+):n(Al3+) is equal to 1.5 to 4; by using NaOH and Na2CO3 as precipitators, dissolving 0.05 moles of the NaOH and the Na2CO3 in the distilled water to prepare solution B; adding the solution A into the solution B dropwise to obtain suspension; and crystallizing the suspension in water bath, and then performing vacuum filtration, washing the crystals by the distilled, drying the crystals, baking the crystals in air, milling the crystals, tabletting the powder and screening the powder to obtain the hydrotalcite derivational compound oxide catalyst. The hydrolysis catalyst prepared by the method can be remove COS in gases, and simultaneously remove H2S generated in hydrolysis, and the desulfurization precision is high; and the hydrolysis catalyst can be used at the low temperature, the operational temperature is between 30 and 80 DEG C, and the energy consumption is low.

The invention adopts polyacrylamide and a nano inorganic phase to prepare a polyacrylamide nano composite material through an in-situ polymerization method and then forms a fracturing fluid thickening agent. The nano inorganic phase is prepared by mixing the products of intercalation reactions between an organic long-chain intercalator and layered silicate with magnesium nitrate and aluminum nitrate. The nano inorganic phase, acrylamide monomer, a coupling agent, a complexing agent, an initiator, an oxidant, a reductant, a cosolvent, an auxiliary agent, and deionized water form a suspension fluid reaction system, and the polyacrylamide nano composite material is formed after the polymerization-intercalation composite reactions. The polyacrylamide nano composite material with a mass percentage of 0.25% is taken as the thickening agent, and then is mixed with a crosslinking agent with a mass percentage of 0.20%, a gel breaker with a mass percentage of 0.20%, and other auxiliary agents to form a fracturing fluid system. The system is sheared for 70 minutes under a shearing speed of 170 s<-1> at a temperature of 150 DEG C so as to form a fracturing fluid with a viscosity larger than 50 mPa.s, and the fracturing fluid has the characteristics of high temperature resistance, shearing resistance, low frictional resistance, complete glue breaking effect, and good compatibility with the formation fluid.

The invention discloses a formulation of an AC zinc oxide resistance chip. The formulation is characterized by comprising the following additives and a main material ZnO by weight percentage: 4.0 to 4.9 percent of Bi2O3, 3.0 to 4.0 percent of Sb2O3, 0.5 to 1.0 percent of SiO2, 2.0 to 3.0 percent of Co2O3, 0.50 to 0.80 percent of Cr2O3, 0.50 to 0.80 percent of MnCO3, 0.70 to 0.90 percent of NiO, 0.03 to 0.05 percent of aluminum nitrate, 0.10 to 0.20 percent of glass dust, 0.07 to 0.10 percent of B2O3 and 85.0 to 88.0 percent of ZnO. The formulation of the resistance chip has the following characteristics and advantages: the nickel protoxide and the glass dust are introduced into the formulation, so that the stability and the aging performance of the internal structure of the resistance chip is more excellent; and 2, dosage of cobalt sesquioxide, dibismuth trioxide and diantimony trioxide are added in the formulation, the mixture ratio of each composition is more reasonable, and the non-linearity coefficient of the resistance chip can be improved, the pressure ratio is reduced, the circulation capability is improved, and the comprehensive performance is excellent.

A method for preparing silicon carbide-aluminum nitride (SiC-AlN) solid solution ceramic powder belongs to the field of ceramic powder preparation, which enables submicron with small particle size to be directly contacted reacted through improvement of a raw material mixing method to improve reactivity of a precursor, and is favorable to preparation of the SiC-AlN solid solution ceramic submicron powder which is high in purity, fine in particle size, and good in uniformity and the reactivity under the condition of low temperature. An aluminum source is aluminum nitrate, a silicon source is silica solution, a carbon source is dextrose, and an annexing agent is urea, polyacrylamide and nitric acid. Molar ratio between the aluminum source and the silicon source is Si:Al=1: (0.2-5), molar ratio between the aluminum source and the silicon source and the carbon source is (Si+Al): C=1: (5-16), molar ratio between +5 valent nitrogen and -3 valent nitrogen is N+5:N-3=1: (0.1-10), and mass ratio between the polyacrylamide and the silica solution is (0.5-2):1. The method for preparing the SiC-AlN solid solution ceramic powder is wide in raw material source and low in prize and production cost, and prepared SiC-AlN solid solution ceramic submicron powder is stable in performance, simple in production process and capable of achieving mass production.

The invention discloses a method of synthesizing a molecular sieve by using a solid phase. In the method, ammonium fluoride is used as a mineralizing agent and a brominized organic template is used as a guiding agent; and the method comprises the following steps: mixing a certain amount of water with anhydrous sodium metasilicate and recrystallizing to form crystal water-containing sodium metasilicate; then, mixing and grinding the certain amount of crystal water-containing sodium metasilicate, white carbon black, the brominized organic template, ammonium fluoride and/or aluminum nitrate together till mixing uniformly, then putting the ground mixture into a glass tube and sealing with flame; and crystallizing the sealed glass tube in an oven at 180 DEG for 4 weeks, washing the reaction products and drying the reaction products in an oven with the temperature of 60 DEG C till the reaction products are completely dried. By using ammonium fluoride as the mineralizing agent, an ITO (Indium tin oxide)-13 molecular sieve which cannot be obtained in an alkaline synthesis route and an F-ZSM (Zeolite Socony Mobil)-5 zeolite molecular sieve are obtained, and good degree of crystallinity and purity are kept. The reactant cost is lowered, the energy consumption is reduced and the product purity is high.

The invention relates to a preparation method of a nano-alumina reinforcing copper-based composite, comprising sol-gel preparation, self-spreading burning and reduction sintering. The preparation method is characterized by comprising the following steps of: mixing an aluminum nitrate solution and a copper nitrate solution, adding citric acid as a chelant, regulating pH value of the mixed solution to be less than seven to obtain sol, placing the sol in the environment with the temperature of 90 DEG C to 120 DEG C for more than 10 hours to form gel, heating the gel to 300 DEG C to 500 DEG C to carry out self-spreading burning, grinding to obtain black nano-alumina and copper oxide powder, sintering the black powder for more than 8h at 300-400 DEG C under a reducing atmosphere to obtain nano-alumina and copper composite powder, molding the composite powder by compression, and sintering in the reducing atmosphere of 800 DEG C to 900 DEG C for one to three hours to obtain the composite with the volume percentage content of Al2O3 is 0.1% to 3%. The composite can be widely used in the fields of machinery, electron, space flight and aviation, and the like.

The invention discloses a preparation method of aluminum doped zinc oxide nano powder. A technological process of the preparation method is shown as follows: first synthesizing a zinc nitrate-urea white sol microemulsion, standing, then filtering, adding aluminum nitrate into a filtering liquid to form a zinc nitrate aluminum mixed solution; preparing a sodium carbonate solution, dropping both the sodium carbonate solution and the zinc nitrate aluminum mixed solution into a polyvinyl alcohol aqueous solution to synthesize a white precipitate precursor; standing and filtering, and thus obtaining the aluminum doped zinc oxide nano powder through deionized water leaching, drying, grinding, sieving and calcining of a filter cake. The aluminum doped zinc oxide nano powder obtained by the method has good dispersibility and less agglomeration, the powder particle size is between 5 and 30 nm, the particle size distribution range is narrow, and the morphology is spherical or quasi spherical. The method has the advantages of simple process, low cost, short reaction period, high yield, and easy control of the reaction processes, and is suitable for mass production; and compared with traditional methods, the powder produced by the method contains no chlorine ion which can influence the performance of the powder, and the method needs no ethanol for washing, and no alkali for neutralization.

The invention relates to a novel nickel-based liquefied petroleum gas (LPG) water vapor reforming catalyst and a preparation method thereof, and belongs to the technical field of catalyst preparation processes. The LPG water vapor reforming catalyst consists of oxides of nickel, magnesium and aluminum. The LPG water vapor reforming catalyst is characterized in that: the nickel content is 5 to 20 weight percent, and the molar ratio of the magnesium to the aluminum is 0.5-2:1. The preparation method comprises the following steps of: titrating soluble magnesium nitrate and aluminum nitrate to obtain sediment by using alkali liquor; performing suction-filtration, washing, drying and baking the sediment to obtain a magnesium aluminum composite oxide carrier; and loading a certain amount of nickel on the obtained carrier by an immersion method, and drying and baking the carrier again to obtain a finished catalyst product. The prepared catalyst has the advantages of high catalytic activity, wide usage temperature, good catalytic stability, high mechanical strength, low production cost and the like. The life experiment results show that the preferable 15 weight percent Ni/Mg1.25 (Al) catalyst is a potential LPG water vapor reforming catalyst.