Sealing composition
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United States of America Patent
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-
May 14, 2002
Grant Date -
N/A
app pub date -
Aug 2, 2000
filing date -
Aug 13, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sealing composition having at least one member from .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and Pb.sub.3 O.sub.4 powder incorporated in a total amount of from 0.0001 to 3 parts by weight to 100 parts by weight of a composition comprising at least 80 wt % and less than 98.99 wt % of a powder of PbO--ZnO--B.sub.2 O.sub.3 --SiO.sub.2 type crystalline low melting point glass, from 0.01 to 5 wt % of a zircon powder, more than 1 wt % and not more than 19.99 wt % of an .alpha.-alumina powder and from 0 to 10 wt % of a low expansion ceramic filler.
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