Method of making wall-flow monolith filter
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United States of America Patent
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Oct 12, 2004
Grant Date -
Nov 28, 2002
app pub date -
Apr 23, 2002
filing date -
Apr 23, 2001
priority date (Note) -
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Abstract
A ceramic honeycomb wall-flow filter is prepared by plugging channels in a ceramic honeycomb by a method comprising the following. First, a mixture comprised of a dispersing liquid and ceramic powder is formed. Next, the mixture is inserted on one end of the channel in an unplugged ceramic honeycomb such that the mixture flows to the other end where the mixture collects and forms a plugged ceramic honeycomb. Then, the plugged ceramic honeycomb is heated to a temperature sufficient to sinter the plugged ceramic honeycomb to form a porous sintered plugged ceramic honeycomb.
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