Micronized alkaline earth metal carbonate
    2.
    发明授权
    Micronized alkaline earth metal carbonate 失效
    微粉化碱土金属碳酸盐

    公开(公告)号:US06479029B1

    公开(公告)日:2002-11-12

    申请号:US09065067

    申请日:1998-06-03

    IPC分类号: C01F1118

    摘要: The invention concerns a micronized alkaline earth metal carbonate prepared with or without the use of an agent preventing crystal growth, and a process for its preparation and use. The prepared micronized calcium carbonate, barium carbonate with a BET surface area ranging from 3 to 30 m2/g or strontium carbonate with a BET surface area ranging from 3 to 50 m2/g is suitable in particular for preparing capacitors, thermistors and other oxide ceramic electrical components containing calcium oxide, barium oxide or strontium oxide, and high-temperature superconductors. Ammonium salts or alkylammonium salts of carboxylic acids having a total of between 3 and 12 carbon atoms and at least two COOH groups or at least two OH groups, e.g. salts of maleic acid or nitric acid, are used as agents preventing crystal growth.

    摘要翻译: 本发明涉及使用或不使用防止晶体生长的试剂制备的微粉化碱土金属碳酸盐及其制备和使用方法。 制备的微粉化碳酸钙,BET表面积为3〜30m2 / g的碳酸钡或BET表面积为3〜50m2 / g的碳酸锶,特别适用于制备电容器,热敏电阻等氧化物陶瓷 包含氧化钙,氧化钡或氧化锶的电气部件和高温超导体。 具有总共3至12个碳原子和至少两个COOH基团或至少两个OH基团的羧酸的铵盐或烷基铵盐,例如, 马来酸或硝酸的盐被用作防止晶体生长的试剂。