发明名称 |
Ceramic composition of matter and its use |
摘要 |
A ceramic composition of matter which is sinterable at low temperatures is composed of a) 40 to 90% by weight of a finely disperse, high-melting oxidic material and b) 10 to 60% by weight of a finely disperse glass having a softening point of 500 DEG to 850 DEG C., a coefficient of thermal expansion (=CTE) of 2 to 5x10-6 K-1 (measured in the interval from 0 DEG to 400 DEG C.) and a dielectric constant of less than 5 (measured at 106 Hz and 20 DEG C.). The finely disperse oxidic material is composed of a mixture of MgO, Al2O3 and SiO2 in an Al2O3/MgO weight ratio of 1.8-4 with an SiO2 weight fraction of 42-65% by weight or an equivalent quantity of corresponding oxide precursors which, on heating, decompose to give these oxides. The MgO or the MgO precursor has a mean grain size of 0.05 to 3 mu m and the SiO2 or the SiO2 precursor has a mean grain size of 2 to 20 mu m. The composition sinters at 900 DEG -1100 DEG C. and is suitable for producing substrates or metallized housings. |
申请公布号 |
IE64626(B1) |
申请公布日期 |
1995.08.23 |
申请号 |
IE19900003823 |
申请日期 |
1990.10.24 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
FOLEY PAUL;BUCKPESCH RAINER |
分类号 |
C04B37/04;C03C10/08;C03C14/00;C04B35/18;H01B3/08;H01B3/12;H01L21/48;H01L23/15;H05K1/03;H05K3/46;(IPC1-7):C03C14/00;C04B35/20 |
主分类号 |
C04B37/04 |
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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