发明名称 |
Additives for Suppressing Tungsten Leachability |
摘要 |
The leachability of tungsten in an aqueous medium may be suppressed by combining tungsten metal with a metal oxide or metal salt that will form an insoluble tungsten-containing compound when the mixture is brought into contact with an aqueous medium. The additive is preferably present in an amount from about 1 weight percent (wt. %) to about 10 weight percent of the tungsten of the tungsten. Preferred additives are lead oxide and calcium sulfate.
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申请公布号 |
US2006196585(A1) |
申请公布日期 |
2006.09.07 |
申请号 |
US20060306705 |
申请日期 |
2006.01.09 |
申请人 |
OSRAM SYLVANIA INC. |
发明人 |
LUNK HANS-JOACHIM;MORGAN RICKY D.;STEVENS HENRY J. |
分类号 |
C22B34/30;C01G37/14;C01G41/00;C22C27/04 |
主分类号 |
C22B34/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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