Thin ceramic articles obtained by fusing and casting in a mold a composition of the system Al.sub.2 O-ZrO.sub.2 -SiO.sub.2 -K.sub.2 O which have good mechanical strength and abrasion resistance properties
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United States of America Patent
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Mar 20, 1990
Grant Date -
N/A
app pub date -
Feb 15, 1989
filing date -
Feb 19, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to ceramic articles. It relates to an article made of ceramic material produced by fusing and casting in a mold a composition based on alumina, zirconia, silica and an alkali metal oxide, said article consisting of crystalline corundum and zirconia phases and of a vitreous phase, said zirconia being substantially in monoclinic form from the core to the skin of said article, and having, in at least one of its parts, a thickness lower than or equal to 30 mm and being intended for an application where mechanical strength and/or abrasion resistance are of primary importance, said composition consisting essentially, in % by weight based on the oxides, of:
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