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    • 65. 发明授权
    • Multilayer-coated powder and process for producing the same
    • 多层涂层粉末及其制造方法
    • US06207280B1
    • 2001-03-27
    • US09202212
    • 1998-12-10
    • Takafumi AtarashiKatsuto Nakatsuka
    • Takafumi AtarashiKatsuto Nakatsuka
    • B32B516
    • C23C28/044B22F1/02C01B13/145C01P2004/84C09C1/62C09C3/063C09C3/066C09C3/08C23C26/00C23C28/04G03G9/0832G03G9/0833G03G9/1075Y10T428/2991Y10T428/2993
    • In producing a multilayer-coated powder by coating the surface of a base powder of a metal, metal oxide, etc. with two or more layers of a metal oxide or the like, the films of a metal oxide or the like are formed through decomposition, etc. from a metal salt as an inexpensive material. This is attained by making the powder particles not to be attacked by acids, etc. when the metal salt decomposition or the like, which yields an acid, etc., is conducted. The multilayer-coated powder is characterized in that the multilayered film comprises at least one layer consisting of a metal hydroxide or metal oxide film formed by the hydrolysis of a metal alkoxide and, as a layer disposed on the outer side of that layer, a coating film consisting of a metal hydroxide or metal oxide film formed by a reaction, e.g., neutralization or pyrolysis, of a metal salt. Upon heating, the metal hydroxide or metal oxide film formed by the hydrolysis of a metal alkoxide becomes a dense metal oxide film.
    • 在通过用两层或多层金属氧化物等涂覆金属,金属氧化物等的基底粉末的表面来制造多层涂覆的粉末时,通过分解形成金属氧化物等的膜 等金属盐作为廉价的材料。 这是通过在进行产生酸等的金属盐分解等的情况下使粉末颗粒不被酸等侵蚀来实现的。 多层涂覆粉末的特征在于,多层膜包括至少一层由金属醇盐的水解形成的金属氢氧化物或金属氧化物膜,作为设置在该层的外侧的层,涂层 由通过金属盐的反应(例如中和或热解)形成的金属氢氧化物或金属氧化物膜构成的膜。 在加热时,通过金属醇盐水解形成的金属氢氧化物或金属氧化物膜变成致密的金属氧化物膜。
    • 69. 发明授权
    • Process of preparing transparent colored magnetic materials
    • 制备透明色磁性材料的工艺
    • US4150173A
    • 1979-04-17
    • US710537
    • 1976-08-02
    • Ronald F. Ziolo
    • Ronald F. Ziolo
    • G03G9/08G03G9/083H01F1/06H01F10/04
    • G03G9/083G03G9/0825G03G9/0832G03G9/0833G03G9/0837H01F1/063
    • Transparent colored materials having low bulk densities and high magnetic permeabilities are obtained by encasing silicaceous particles in a sheath of magnetic or magnetically-attractable metal, which are then heat-treated. The magnetic composite particles are prepared by the solution phase thermal decomposition of transition metal carbonyls in the presence of the silicaceous particles with a suitable suspending medium. Air and moisture are excluded from the reaction vessel and the contents are heated with agitation so that the carbonyl boils and the mixture is refluxed until the temperature rises to that of the suspending medium whereupon coating of the silicaceous particles with elemental metal is complete. The mixture is cooled, the beads washed, air-dried, and recovered. The metal coated particles are then heated in an ambient atmosphere for between about 2 to about 120 minutes at a temperature of from between about 50.degree. C. and 700.degree. C. Particles having transparency, color, and magnetism in the same body are obtained.
    • 通过将硅质颗粒包裹在磁性或磁性吸引金属的护套中,然后进行热处理,可获得具有低堆积密度和高磁导率的透明有色材料。 在具有合适的悬浮介质的硅质颗粒存在下,通过溶解相热分解过渡金属羰基来制备磁性复合颗粒。 将空气和水分从反应容器中排除,并将内容物搅拌加热,使得羰基沸腾并将混合物回流直到温度升高至悬浮介质的温度,随后用元素金属涂覆硅质颗粒。 将混合物冷却,洗涤珠子,空气干燥并回收。 然后将金属涂覆的颗粒在环境气氛中在约50℃至700℃的温度下加热约2至约120分钟。获得在同一体内具有透明度,颜色和磁性的颗粒。