摘要:
A process for producing zinc oxide-containing spherical silica, which comprises emulsifying, in an organic solvent containing a surfactant, a dispersion having zinc oxide with a particle size of from 0.005 to 0.5 .mu.m dispersed in an aqueous alkali metal silicate solution in an amount of from 10 to 70 wt % based on the total amount of zinc oxide and SiO.sub.2 in the aqueous alkali metal silicate solution, followed by gelation of the resulting emulsion with carbon dioxide gas.
摘要:
An alumina sol having an alumina solid content of at least 10 wt % and a viscosity of not higher than 5 Pa.s measured by a Brookfield viscometer and containing a cation other than a hydrogen ion in a total ion equivalent concentration in the range of from 2.0.times.10.sup.-4 to 1.0.times.10.sup.-1 N and a method of preparing the same.
摘要:
A process for producing a lithium-containing composite oxide for a positive electrode active material for use in a lithium secondary battery, the oxide having the formula LipQqNxMyOzFa (wherein Q is at least one element selected from the group consisting of titanium, zirconium, niobium and tantalum, N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than Q and N, 0.9≦p≦1.1, 0≦q
摘要翻译:一种锂二次电池用正极活性物质的含锂复合氧化物的制造方法,其特征在于,具有式LipQqNxMyOzFa(其中,Q为选自钛,锆,铌和 钽,N是选自Co,Mn和Ni中的至少一种元素,M是选自Al,碱土金属元素和Q和N以外的过渡金属元素中的至少一种元素,0.9&nlE ; p&nlE; 1.1,0和nlE; q <0.03,0.97和nlE; x和nlE; 1.00,0和nlE; y <0.03,1.9&amp; nlE; z&nlE; 2.1,q + x + y = 1和0&lt; nlE; a&nlE; 0.02) 锂元素源和N元素源的混合物,当这些元素存在时,M元素源和/或氟源在含氧气氛中,其中Q元素源是具有 pH为0.5〜11。
摘要:
Scaly silica particles having a laminated structure, consisting essentially of secondary particles of foliar silica, each formed by a plurality of flaky primary particles of scaly silica which are overlaid one on another and aligned face-to-face in parallel with one another, said secondary particles being present independent of one another.
摘要:
A dry-etching process comprising dry-etching treatment of semiconductor material by action of a gas and, if necessary, cleaning treatment, characterized in that at least one of the dry-etching and cleaning treatments is conducted under action of a gas composed essentially of a fluorinated ether.
摘要:
A method for synthesizing amorphous silicon nitride, wherein silicon halide and ammonia are reacted in a reaction vessel at a high temperature in the absence of oxygen to thereby synthesize powder of amorphous silicon nitride, then the powder is separated from a gas containing therein gaseous ammonia halide which has been produced simultaneously with said amorphous silicon nitride by use of a collecting means, comprises directly mixing, in advance of the separation, cool gas containing therein neither oxygen nor moisture into said gas to cool down said powder and gas so that both substances may be put in said collecting means without deposition of ammonium halide to the inner wall of the reaction vessel, and other component parts.
摘要:
A floor polishing composition containing a film-formable organic high molecular material as the main component, which further contains at least scaly particles.
摘要:
A process for producing a hardenable composition with high storage stability containing scaly silica particles which consist essentially of foliar secondary silica particles and have a laminated structure, said process comprising: (1) a step of subjecting a silica sol, a silica hydrogel or hydrous silicic acid to hydrothermal treatment in the presence of an alkali metal salt to form tertiary agglomerated particles of the scaly silica in the form of porous three-dimensional disorderly agglomerates of foliar secondary silica particles, each secondary particle being formed by a parallel face-to-face alignment of a plurality of flaky primary particles which are overlaid one on another, and (2) a step of disintegrating and dispersing the tertiary agglomerated particles of silica in an organic polymer in the form of an aqueous emulsion by a wet method.
摘要:
A silica-metal oxide particulate composite comprising silica agglomerates having voids formed by random stacking of scaly silica primary particles, and metal oxide particulates supported on the surfaces, and the inner surfaces in the voids, of the silica agglomerates.
摘要:
It is to provide a positive electrode active material for a lithium secondary battery, which has a large volume capacity density and high safety, is excellent in uniform coating properties and is excellent in the charge and discharge cyclic durability and low temperature characteristics even at a high charge voltage. A process for producing a lithium-containing composite oxide represented by the formula LipQqNxMyOzFa (wherein Q is at least one element selected from the group consisting of titanium, zirconium, niobium and tantalum, N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than the Q element and the N element, 0.9≦p≦1.1, 0
摘要翻译:本发明提供一种具有容量密度大,安全性高的锂二次电池用正极活性物质,均匀涂布性能优异,即使在高温下也具有优异的充放电循环耐久性和低温特性 充电电压。 一种由下式表示的含锂复合氧化物的制备方法:其中R 1,R 2,R 2,R 3, (其中Q是选自钛,锆,铌和钽中的至少一种元素,N是选自下组中的至少一种元素:其中Q是选自钛,锆,铌和钽中的至少一种元素, 由Co,Mn和Ni组成,M是选自Al,碱土金属元素和Q元素和N元素以外的过渡金属元素中的至少一种元素,0.9 <= p <= 1.1,0 < 来自锂源的q <= 0.03,0.97 <= x <1.00,0 <= y <0.03,1.9 <= z <= 2.1,q + x + y = 1和0 <= a <= 0.02) 元素源和N元素源,并且如果需要,选自由M元素源和氟源组成的组中的至少一种源,其特征在于将作为Q元素源的Q元素化合物水溶液用作pH值为 0.5至11。