发明名称 |
Method of producing a composite material having a high SiO2 content, composite material obtained according to the method, and permanent mold made thereof |
摘要 |
Composite material with high resistance to temperature changes and a high density, and having an SiO2-containing matrix with quartz glass grains embedded therein is produced by preparing a suspension from a particle mixture of finely divided SiO2 powder having at least two different particle fractions and of the quartz glass grains, forming a green compact and sintering the compact. The matrix has an SiO2 content of at least 99% by wt. and is formed from at least first and second particle fractions, each of which is present as granules of nanoscale, amorphous, synthetically produced SiO2 primary particles having a mean primary particle size of less than 100 nm. The composite material has an SiO2-containing matrix with an SiO2 content of at least 99% by wt. It is particularly suited for applications such as starting material for producing a permanent mold for melting solar silicon.
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申请公布号 |
US6660671(B2) |
申请公布日期 |
2003.12.09 |
申请号 |
US20020103660 |
申请日期 |
2002.03.21 |
申请人 |
HERAEUS QUARZGLAS GMBH & CO. KG. |
发明人 |
WERDECKER WALTRAUD;GERTIG UDO;LEIST JOHANN;KOEPPLER RAINER |
分类号 |
C03B20/00;C01B33/12;C03B19/06;C03B19/12;C03C3/06;C03C14/00;C04B35/14;C04B35/653;(IPC1-7):C03C1/00 |
主分类号 |
C03B20/00 |
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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