发明名称 |
Boron addition for making potassium-doped tungsten |
摘要 |
A boron addition for making potassium-doped tungsten powder is described herein. Boron is added to a potassium-doped starting material, preferably in the form of boric acid, and then the mixture is reduced to form a potassium-doped tungsten powder. The boron addition results in increased potassium incorporation in the potassium-doped tungsten powder and also effects an increase in potassium retention in sintered compacts of the potassium-doped tungsten powder. |
申请公布号 |
EP1275742(B1) |
申请公布日期 |
2003.09.17 |
申请号 |
EP20020011983 |
申请日期 |
2002.05.29 |
申请人 |
OSRAM-SYLVANIA INC. |
发明人 |
LUNK, HANS-JOACHIM, DR.;NACHED, ANNA S.;SALMEN, MICHAEL, DR.;STEVENS, HENRY J. |
分类号 |
B22F9/22;B22F9/20;C01G41/00;C22C1/04;H01K1/08 |
主分类号 |
B22F9/22 |
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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