Alveolar ceramic filters for high melting metals
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United States of America Patent
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-
May 1, 1990
Issued Date -
N/A
app pub date -
Nov 10, 1988
filing date -
Mar 19, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Shaped, porous filter members having a size and shape adapted for the filtration of liquid metals, e.g., the configuration of a honeycomb, are comprised of a porous alveolar ceramic material including from 10 to 20% SiO.sub.2, from 50 to 60% Al.sub.2 O.sub.3 and from 20 to 40% ZrO.sub.2, each percentage being by weight with respect to the total weight of said oxides, said Al.sub.2 O.sub.3 and SiO.sub.2 being present in the form of mullite, 3Al.sub.2 O.sub.3 /2SiO.sub.2, and the combined weight of the zirconia and mullite comprising at least 90% by weight of said alveolar ceramic material.
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