Silicon slip-casting composition, and process for the preparation thereof
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United States of America Patent
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Feb 7, 1995
Grant Date -
N/A
app pub date -
Aug 26, 1992
filing date -
Aug 28, 1991
priority date (Note) -
Expired
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Abstract
Silicon slip-casting composition, and process for the preparation thereof A silicon slip-casting composition comprising from 25 to 50% by weight of water and a pulverulent solid component which essentially comprises silicon and inorganic sintering aids is described, where the aqueous phase has a pH in the range from 8 to 9.5. The solid component comprises from 65 to 88% by weight of silicon, from 5 to 24% by weight of Y.sub.2 O.sub.3, from 2 to 9.6% by weight of Al.sub.2 O.sub.3 and from 1 to 5% by weight of SiO.sub.2 on the surface of the Si particles. The mean particle size of the solid component is at most 20 .mu.m, in particular at most 5 .mu.m. The invention also relates to a process for the preparation of the slip-casting composition.
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