摘要:
A method of producing (1) metal particles or (2) metal fine-particles, which contains: jetting out two solutions of (1) a metal salt solution and a reducing agent solution, or (2) a metal ion-containing solution and a hydroxide ion-containing solution, from respective nozzles to a mixing chamber, to give a mixed reaction solution; and discharging the mixed reaction solution from a discharging port having a diameter smaller than a diameter of the mixing chamber, wherein one of the two solutions is made into straightly-going flow, which is jetted from a nozzle having a diameter smaller than the diameter of the mixing chamber to the mixing chamber, and the other solution is jetted out, as flow substantially orthogonal to the straightly-going flow, to a position before a position where eddy viscosity generated by the straightly-going flow would be maximum.
摘要:
Post-processing methods for nanoparticles are disclosed. Methods for real time quality control of nanoscale powder manufacture are discussed. Uses of post-processed particles and consolidation methods are disclosed. Disclosed methods can enable commercial use of nanoscale powders in wide range of nanotechnology applications.
摘要:
A process for producing valve metal oxides, such as tantalum pentoxide or niobium pentoxide with a narrow particle size distribution within a desired particle size range, is provided. According to the process of the present invention, the valve metal fraction from digestion of valve metal material containing ore is processed under controlled temperature, pH, and residence time conditions to produce the valve metal pentoxide and pentoxide hydrates. Also, disclosed are new tantalum pentoxide and niobium pentoxide products and new tantalum pentoxide precursors and niobium pentoxide precursors.
摘要:
The present invention relates to metal oxides containing multiple dopants. The metal oxides have the formula: LiMynullxnullAnullxOz or MynullxnullAnullxOz, wherein M is a transition metal, 0
摘要:
The present invention provides a process for producing particles comprising mixing, in a substantially water-free environment, at least one metal compound of the formula M(O2CR)nX(m-n)Lp wherein M is an electropositive element of Groups 1-15, each X is independently selected from the group consisting of O1/2, F, Cl, Br, I, OR, O2CR, NR2, and R, each R is independently a hydrocarbyl group, each L is independently a Lewis base ligand, n is equal to null the oxidation state of the metal M in the product particle, m is equal to the oxidation state of M in the compound M(O2CR)nX(m-n)Lp and pnull0; at least one surfactant; and at least one solvent wherein the mixture is thermally treated for a time sufficient to convert the at least one metal compound into particles of the corresponding oxide having sizes in a range between about 0.5 nanometers and about 1000 nanometers.
摘要:
The present invention relates to a metal oxide powder for high precision polishing and prepartion thereof, comprising aggregates formed by cohesion of primary particles, which has a cohesive degree (null) of 1.1 to 2.0 and a cohesive scale (null) of 3 to 10, the cohesive degree (null) and the cohesive scale (null) being defined by formula (I) and formula (II), respectively: nullnull6/(Snullnullnulld(XRD))nullnull(I) nullnullweight average particle diameter/d(XRD)nullnull(II) wherein, S is the specific surface area of the powder; null, the density; and d(XRD), the particle diameter of the powder determined by X-ray diffraction analysis. In accordance with the present invention, it is possible to provide a high polishing speed and reduce scratches.
摘要翻译:本发明涉及一种用于高精度抛光及其制备的金属氧化物粉末,其包含通过粘结度(α)为1.1〜2.0,凝聚度(β)为3〜10的一次粒子凝聚而形成的聚集体, 分别由式(I)和式(II)定义的内聚度(α)和粘结度(β):α= 6 /(Sxrhoxd(XRD))(I)β=重均粒径/ d XRD)(II)其中,S为粉末的比表面积; 密度; 和d(XRD),通过X射线衍射分析确定粉末的粒径。 根据本发明,可以提供高抛光速度并减少划痕。
摘要:
A method of producing fine particles of an oxide of a metal, comprising the steps of: preparing an acidic solution which contains ions of the metal; precipitating fine particles of a hydroxide of the metal by adding an alkaline solution to the acidic solution; collecting the fine particles of the hydroxide of the metal precipitated in a mixed solution of the acidic solution and the alkaline solution; mixing fine particles of a carbon with the collected fine particles of the hydroxide of the metal; and heat-treating a mixture of the fine particles of the hydroxide of the metal and the fine particles of the carbon at a predetermined temperature in a non-reducing atmosphere, whereby the fine particles of the oxide of the metal are produced.
摘要:
A method is disclosed for synthesizing a crystalline metal oxide powder material containing two or more uniformly distributed metal elements. Crystalline, water containing, oxygen containing inorganic acid salts of the metals are heated to liquefy the salts. The apparent solution contains a uniform mixture of the metal elements. The water is removed from the liquid and the resulting powder calcined in air to decompose the acid salts to a mixed metal crystalline oxide. The method is particularly useful to make doped LiNiO2 type crystals using hydrated nitrate or nitrite salts of Li, Ni and the dopant elements. Examples of useful salts are LiNO3.H2O, Ni(NO3)2.6H2O, Co(NO3)2.6H2O, Al(NO3)3.9H2O, and Mg(NO3)2.6H2O.
摘要:
A metal oxide powder except null-alumina, comprising polyhedral particles having at least 6 planes each, a number average particle size of from 0.1 to 300 nullm, and a D90/D10 ratio of 10 or less where D10 and D90 are particle sizes at 10% and 90% accumulation, respectively from the smallest particle size side in a cumulative particle size curve of the particles. This metal oxide powder contains less agglomerated particles, and has a narrow particle size distribution and a uniform particle shape.
摘要:
A method for producing fine or ultra fine powder particles comprising mixing a metal alkoxide with a non-metallic hydride in an organic solvent, agitating the mixed solution, and then burning the mixed solution. The burning process comprises igniting the solution directly or burning the solution in situ. A self-sustaining flame will result. When the precursor solution burns, the metallic compound will be co-fired with the organic solvent. As a result, fine or ultra fine particles of mixed metal will burst from the flame, or thrust through the flame and be synthesized.