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    • 2. 发明授权
    • Method for producing barium titanate based powders by oxalate process
    • 通过草酸盐法生产钛酸钡基粉末的方法
    • US06641794B2
    • 2003-11-04
    • US09871286
    • 2001-05-31
    • Jai Joon LeeKang Heon Hur
    • Jai Joon LeeKang Heon Hur
    • C01G2300
    • C01G25/006C01G23/006C01G25/00C01P2004/62C01P2006/10C01P2006/40
    • The method is carried out in the following manner: An aqueous mixture solution containing barium chloride and titanium chloride is added into an aqueous oxalic acid solution, so that barium titanyl oxalate would be precipitated. Then the precipitates are aged, washed and filtered. The filtered barium titanyl oxalate precipitates are crushed, and dried. Then a thermal decomposition is carried out to obtain a agglomerated barium titanate powder, and this is crushed again to obtain the final barium titanate powder. In order to obtain barium titanate based powder such as Ba(Ti1−zZrz)O3, (Ba1−xCax)(Ti1−zZrz)O3, and (Ba1−x−yCaxSry)(Ti1−zZrz)O3, the desired elements (Ca, Sr, Zr and so on) are added to barium titanyl oxalate when crushed before thermal decomposition step. After thermal decomposition and crushing, the barium titanate based powder can be obtained.
    • 该方法按以下方式进行:将含有氯化钡和氯化钛的混合溶液加入草酸水溶液中,使草酸二氧化钛沉淀。 然后将沉淀物老化,洗涤和过滤。 过滤的草酸氧钛钡沉淀物被粉碎并干燥。 然后进行热分解以获得凝集的钛酸钡粉末,并再次粉碎,得到最终的钛酸钡粉末。 为了获得Ba(Ti1-zZrz)O3,(Ba1-xCax)(Ti1-zZrz)O3和(Ba1-x-yCaxSry)(Ti1-zZrz)O3等钛酸钡系粉末,需要的元素(Ca ,Sr,Zr等)加入到钛酸氧钛酸钡中,在热分解步骤之前被粉碎。 在热分解和破碎之后,可以获得钛酸钡基粉末。