| 发明名称 |
Low density silica particles and method for their preparation |
| 摘要 |
Internal porosity is created in dense SiO2 particles by heating a mixture of the particles with B2O3 above the melting point of both mixture components. Resulting SiO2 particles have altered morphology, internal porosity, and a negative thermal expansion coefficient when heated.
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| 申请公布号 |
US5861134(A) |
申请公布日期 |
1999.01.19 |
| 申请号 |
US19970871162 |
申请日期 |
1997.06.09 |
| 申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
SWANSON, DONALD KEITH |
| 分类号 |
B01J20/10;B01J21/02;B01J21/08;C01B33/12;(IPC1-7):C01B33/113;C03C11/00 |
主分类号 |
B01J20/10 |
| 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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