发明名称 |
Method of making non-sag tungsten wire for electric lamps |
摘要 |
A method of making a potassium-doped tungsten powder is described comprising forming a mixture of ammonium paratungstate or ammonium metatungstate and a potassium-containing compound selected from a thermally unstable potassium-containing salt or a potassium tungstate, and reducing the mixture in a single step without adding additional dopants to form a potassium-doped tungsten powder. The potassium-doped tungsten powder produced by the method of this invention can be pressed, sintered and drawn to produce a non-sag tungsten wire.
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申请公布号 |
US6165412(A) |
申请公布日期 |
2000.12.26 |
申请号 |
US19990390201 |
申请日期 |
1999.09.07 |
申请人 |
OSRAM SYLVANIA INC. |
发明人 |
LUNK, HANS-JOACHIM;SALMEN, MICHAEL;STEVENS, HENRY J. |
分类号 |
C22B5/12;C22B34/36;C22C1/04;H01K1/10;H01K3/02;(IPC1-7):B22F1/02 |
主分类号 |
C22B5/12 |
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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