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专利名称：Zirconium dioxide powder, method of its
production and use
发明人：Helmut Mangold,Werner Hartmann,Dieter
Kerner,Peter Kleinschmit
申请号：US09067915申请日：19980429公开号：US06524548B1公开日：20030225
摘要：Pyrogenically, especially flame-hydrolytically produced zirconium dioxidepowder with a specific surface area between 20 and 200 m/g, a primary particle sizebetween 7 and 100 nm, a tamped density of the deacidified and non-deacidified zirconiumdioxide 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 thedeacidified 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 aburner with air, oxygen, nitrogen and hydrogen, causing the gases to react with eachother 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 zirconiumdioxide and removing any halide remnants adhering to the zirconium dioxide by a heattreatment with moistened air.
申请人：DEGUSSA AG
代理机构：Smith, Gambrell & Russell, LLP
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