发明名称 |
High-purity silica powder, and process and apparatus for producing it |
摘要 |
Use of a flame hydrolysis apparatus for preparing fumed silica particles or a plasma torch apparatus for sintering fumed silica particles to fused silica particles is capable of producing highly pure silica with non-silicon metal impurities less than 500 pb, when at least an inner nozzle is constructed of a silicon-containing material having a low level of non-silicon metal impurities. Preferably, all surfaces in the respective apparatus which contact silica are of similar construction. The silica contains a low level of impurities as produced, without requiring further purification.
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申请公布号 |
US2005129603(A1) |
申请公布日期 |
2005.06.16 |
申请号 |
US20040943747 |
申请日期 |
2004.09.17 |
申请人 |
WACKER-CHEMIE GMBH |
发明人 |
SZILLAT HOLGER;SCHWERTFERGER FRITZ;HAACK BERND;SCHAFER MARCUS |
分类号 |
C01B39/00;C01B33/18;C03B19/10;C03C3/06;C03C12/00;(IPC1-7):C01B33/12;B01J8/04;B01J10/00 |
主分类号 |
C01B39/00 |
代理机构 |
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