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    • 4. 发明授权
    • Method of producing bismuth titanate fine powders
    • 生产钛酸铋细粉的方法
    • US4668500A
    • 1987-05-26
    • US814256
    • 1985-12-30
    • Hiroshi YamanoiSatoru UedairaMasayuki SuzukiHidemasa Tamura
    • Hiroshi YamanoiSatoru UedairaMasayuki SuzukiHidemasa Tamura
    • C01G29/00C04B35/475C01G23/00
    • C01G29/00C04B35/475C01P2002/02C01P2002/72C01P2002/77C01P2004/03C01P2006/80
    • A method of producing bismuth titanate fine powders comprising hydrolysis product of an inorganic titanium compound or water soluble titanium salt, reacting the solution with water soluble bismuth compound in an aqueous alkaline solution having pH value between 14.0 and 14.9, and filtering and washing the resulting precipitates from the solution. Further, a method of producing bismuth titanate fine powder comprising the steps of, preparing an aqueous solution containing hydrolysis product of titanium compound or water soluble titanium salt, reacting the solution with water soluble bismuth compound in an aqueous alkaline solution having pH value between 14.1 and 14.85 at a temperature not lower than 150.degree. C.When the reaction is to be carried out at an ambient pressure, it can be carried at a temperature higher than 50.degree. C. and lower than the boiling point of the solution at the ambient pressure. The precipitate resulting from the reaction is filtered and heat-treated to fine powders of bismuth titanate Bi.sub.4 Ti.sub.3 O.sub.12. When the reaction of the solution is carried out in an autoclave and at higher than 150.degree. C., it is possible to directly obtain the fine powders of bismuth titanate of the orthorhombic structure.
    • 一种生产钛酸铋细粉末的方法,其包括无机钛化合物或水溶性钛盐的水解产物,使该溶液与水溶性铋化合物在pH值为14.0至14.9的碱性水溶液中反应,并过滤并洗涤所得沉淀 从解决方案。 另外,制造钛酸铋微细粉末的方法包括以下步骤:制备含有钛化合物或水溶性钛盐的水解产物的水溶液,使该溶液与水溶性铋化合物在pH值介于14.1和 14.85,在不低于150℃的温度下进行反应。当反应在环境压力下进行时,其可以在高于50℃并低于环境压力下溶液的沸点的温度下进行 。 将由反应产生的沉淀过滤并热处理成钛酸铋Bi 4 Ti 3 O 12的细粉末。 当在高压釜中并在高于150℃下进行溶液的反应时,可以直接得到正交结构的钛酸铋的细粉末。