Narrow pore size distribution cordierite filters with reduced pressure drop
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United States of America Patent
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-
Dec 18, 2007
Grant Date -
May 17, 2007
app pub date -
Jan 10, 2007
filing date -
Jun 25, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A diesel particulate filter having a honeycomb body composed of cordierite and exhibiting a CTE (25-800.degree. C.) of less than 13.times.10.sup.-7/.degree. C.; a median pore diameter, d.sub.50, of less than 25 .mu.m; % porosity not less than 53%; and a narrow pore size distribution wherein a value of d.sub.50.sub.-d.sub.10)/d.sub.50 is not greater than 0.6; and a value of d.sub.90 less than 40 .mu.m wherein d.sub.10, and d.sub.90 are pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d.sub.10
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