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    • 3. 发明授权
    • Method for manufacturing zinc oxide whiskers
    • 制造氧化锌砂轮的方法
    • US5158643A
    • 1992-10-27
    • US566475
    • 1991-02-26
    • Minoru YoshinakaEizo AsakuraMotoi KitanoJun YagiHideyuki YoshidaTakashige Sato
    • Minoru YoshinakaEizo AsakuraMotoi KitanoJun YagiHideyuki YoshidaTakashige Sato
    • C30B25/00
    • C30B25/005C30B29/16
    • The present invention provides a method for manufacturing zinc oxide whiskers, whereby zinc powders composed of particles coated with an oxide film, preferably an oxide film having a superior sealing property are, heated for oxidization in an atmosphere containing oxygen.The atmosphere may contain carbon dioxide or steam.The obtained zinc oxide whiskers are formed in a single crystal comprised of a core part and an acicular part spreading in four different directions from the core part.For a baking furnace to obtain zinc oxide whiskers, is employed one that successively forms an atmosphere of a high partial pressure of zinc steam at the source side and an atmosphere of a high partial pressure of oxygen for facilitating formation of whiskers. The zinc oxide whiskers can be controlled in size by selecting the relative ratio of the partial pressure of zinc steam and oxygen.Accordingly, zinc oxide whiskers obtained by the present invention are formed in a single crystal without anisotropy, thereby being applicable to a variety of constructional or electronic materials with no anisotropy in strength and electric properties. Because the resultant crystal is several hundreds .mu.m, the zinc oxide whiskers may be mixed with metals, ceramics or synthetic resins, etc. to increase the mechanical strength thereof remarkably.
    • PCT No.PCT / JP89 / 01245 Sec。 371日期:1992年2月26日 102(e)日期1991年2月26日PCT提交1989年12月13日PCT公布。 出版物WO90 / 0702200 日本1982年6月28日。本发明提供了一种制造氧化锌晶须的方法,其中由氧化膜,优选具有优异密封性的氧化物膜组成的锌粉末在含氧气氛中加热氧化 。 大气中可能含有二氧化碳或蒸气。 得到的氧化锌晶须形成为由芯部和从芯部四个不同方向扩展的针状部分构成的单晶。 对于用于获得氧化锌晶须的烘烤炉,采用在源极侧依次形成锌蒸汽的高分压气氛和高分压氧的气氛,以便于形成晶须。 可以通过选择锌蒸气和氧气的分压的相对比例来控制氧化锌晶须的尺寸。 因此,通过本发明获得的氧化锌晶须形成为不具有各向异性的单晶,从而适用于各种不具有各向异性强度和电性能的结构或电子材料。 由于所得到的晶体为数百μm,氧化锌晶须可与金属,陶瓷或合成树脂等混合,从而显着提高其机械强度。