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1. 发明申请

WO2006045470A1 ALLOYED ZINC POWDERS FOR ALKALINE BATTERIES WITH HIGH PYKNOMETER DENSITY 审中-公开
标题翻译：高浓度密度碱性电池的合金锌粉
公开(公告)号：WO2006045470A1
公开(公告)日：2006-05-04
申请号：PCT/EP2005/011135
申请日：2005-10-13
申请人： UMICORE , STRAUVEN, Yvan , HENNINOT, Christophe
发明人： STRAUVEN, Yvan , HENNINOT, Christophe
IPC分类号： H01M4/42 , H01M4/24 , B22F9/10 , B22F9/08
CPC分类号： H01M4/42 , B22F9/10 , B22F2999/00 , C22C1/04 , C22C18/00 , H01M10/24 , B22F2201/00
摘要： The invention describes alloyed zinc powders for alkaline batteries. The powders have a high pyknometer density as a consequence of the presence of only a limited quantity of pores. This high pyknometer density results in strongly reduced gassing after partial discharge of the powders. Also, a process for the manufacturing of a zinc alloy powder for alkaline batteries is disclosed, comprising the step of atomising a zinc alloy, characterised in that the atomising process has a flow rate of at least 700 kg/h, and preferably at least 1000, 1100 or even 1650 kg/h. In one embodiment, the atomising process is performed in a controlled atmosphere, wherein the oxygen content is less than 4 % by volume, and preferably between 0.2 and 3.5 %. The atomising process can be a centrifugal atomisation process. In the atomising process, the zinc alloy consists either of: a) 0.005 - 2 % by weight of indium, and 0.005 - 0.2 % by weight of either one of Al and Bi; or b) 0.005 - 2 % by weight of indium, and 0.005 - 0.2 % by weight of Bi, and 0.001 - 0.5 % of either one or both of Al and Ca; or c) 0.005 - 2 % by weight of either one or both of Bi and Al; and 0 - 0.5 % by weight of Pb, the remainder being zinc.
摘要翻译：本发明描述了用于碱性电池的合金化锌粉末。这些粉末由于仅存在有限数量的孔而具有较高的定影密度。这种高密度计密度导致粉末局部放电后气体强烈降低。此外，公开了一种用于制造碱性电池用锌合金粉末的方法，包括使锌合金雾化的步骤，其特征在于，所述雾化工艺的流速为至少700kg / h，优选为至少1000 ，1100或甚至1650kg / h。在一个实施方案中，雾化过程在受控气氛中进行，其中氧含量小于4体积％，优选在0.2和3.5％之间。雾化过程可以是离心雾化过程。在雾化过程中，锌合金由以下组成：a）0.005-2重量％的铟和0.005-0.2重量％的Al和Bi中的任一个; 或b）0.005-2重量％的铟和0.005-0.2重量％的Bi和0.001-0.5％的Al和Ca中的一种或两种; 或c）0.005-2重量％的Bi和Al中的任一个或两者; 和0〜0.5重量％的Pb，其余为锌。

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