Zirconium dioxide powder, method of its production and use
    3.
    发明授权
    Zirconium dioxide powder, method of its production and use 失效
    二氧化锆粉末,其生产和使用方法

    公开(公告)号:US06524548B1

    公开(公告)日:2003-02-25

    申请号:US09067915

    申请日:1998-04-29

    IPC分类号: C01G2500

    摘要: Pyrogenically, especially flame-hydrolytically produced zirconium dioxide powder with a specific surface area between 20 and 200 m2/g, a primary particle size between 7 and 100 nm, a tamped density of the deacidified and non-deacidified zirconium dioxide between 40 and 150 g/l with Sears numbers of the deacidified and non-deacidified zirconium dioxide between 1 and 20 ml/2 g and with a chlorine content of the deacidified zirconium dioxide less than 0.6% by weight. These are produced by evaporating zirconium halides, mixing the vapors alone or together with a carrier gas in a burner with air, oxygen, nitrogen and hydrogen, causing the gases to react with each other in a flame in a closed burner chamber, cooling off the waste gases and the zirconium dioxide in a heat exchanger unit, separating the waste gases from the zirconium dioxide and removing any halide remnants adhering to the zirconium dioxide by a heat treatment with moistened air.

    摘要翻译: 热原性地,特别是火焰水解生产的二氧化锆粉末,比表面积为20至200m2 / g,一次粒径在7至100nm之间,脱酸和非脱酸二氧化锆的密度为40-150g / S,数量为1至20ml / 2g之间的脱酸和非脱酸二氧化锆,并且脱酸二氧化锆的氯含量小于0.6重量%。 这些是通过蒸发卤化锆,将蒸气单独或与气体一起携带在具有空气,氧气,氮气和氢气的燃烧器中的气体混合而产生的,导致气体在封闭的燃烧器室中的火焰中彼此反应,冷却 废气和二氧化锆在热交换器单元中分离废气和二氧化锆,并通过用湿润的空气进行热处理除去附着在二氧化锆上的任何卤化物残余物。

    Cerium oxide-metal/metalloid oxide mixture
    10.
    发明授权
    Cerium oxide-metal/metalloid oxide mixture 失效
    氧化铈 - 金属/准金属氧化物混合物

    公开(公告)号:US5897675A

    公开(公告)日:1999-04-27

    申请号:US847640

    申请日:1997-04-25

    摘要: A finely-divided cerium metal/metalloid oxide mixture, containing pyrogenically produced metal/metalloid oxide and 0.001 to 95 wt. % cerium oxide, has a specific surface area between 10 and 400 m.sup.2 /g. The mixture is produced by mixing pyrogenically produced metal/metalloid oxide, having a specific surface area between 30 and 400 m.sup.2 /g, with a cerium compound decomposable to an oxide at elevated temperature, the cerium compound being thermally decomposed to the oxide. The cerium oxide-metal/metalloid oxide mixture can be used as a polishing agent or filler.

    摘要翻译: 精细分离的铈金属/准金属氧化物混合物,其含有热解产生的金属/准金属氧化物和0.001至95重量% %的氧化铈,比表面积为10-400m2 / g。 该混合物通过将比表面积为30-400m2 / g的热解产生的金属/准金属氧化物与在高温下分解成氧化物的铈化合物混合,将铈化合物热分解成氧化物来制备。 氧化铈 - 金属/准金属氧化物混合物可用作抛光剂或填料。