Alumina-zirconia ceramic
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 7, 1989
Issued Date -
N/A
app pub date -
Jun 8, 1988
filing date -
Aug 6, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ceramic consisting essentially of from 1 to 15 percent of glass and 99 to 85 percent of a mixture of particulate Al.sub.2 O.sub.3 and particulate ZrO.sub.2 is disclosed. ZrO.sub.2 is present in a sufficient amount usually from 1/4 to 6 percent base on the of the ZrO.sub.2 and Al.sub.2 O.sub.3, to strengthen the ceramic significantly, by comparison with an otherwise identical ceramic where the particulate ZrO.sub.2 is replaced either by the glass or by particulate Al.sub.2 O.sub.3. The glass constitutes a vitreous phase bonding the particulates into a dense, gas impervious structure, and can be a calcium magnesium silicate glass containing from 45 to 80 percent of SiO.sub.2, from 8 to 55 percent of CaO and MgO, and not more than 15 percent of Al.sub.2 O.sub.3.
First Claim
Other Claims data not available