发明名称 |
METHOD FOR THE PRODUCTION OF NIOBIUM AND TANTALUM POWDER |
摘要 |
<p>In the production of metal valve powders, especially niobium and tantalum, the metal oxide powders are reduced by reduction metal vapors and/or their hydrides in an inert carrier gas. The reduction is at a partial vapor pressure of the reduction metal/hydride of 5-110 hPa and at a total pressure of = 1000 hPa. The preferred metal oxides are of titanium, zirconium, hafnium, vanadium, niobium, tantalum, molybdenum and/or tungsten, and especially tantalum pentoxide. The reduction metal is a magnesium vapor.</p> |
申请公布号 |
EP1753566(B1) |
申请公布日期 |
2009.07.01 |
申请号 |
EP20050729735 |
申请日期 |
2005.04.09 |
申请人 |
H.C. STARCK GMBH;H.C. STARCK LTD. |
发明人 |
HAAS, HELMUT;BARTMANN, ULRICH;KOMEYA, TADASHI;SATO, NOBUYUKI |
分类号 |
B22F9/22;C22B5/04;C22B5/12;C22B34/24;H01G9/042;H01G9/052 |
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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