Patent ID: 6261982
Filing Date: 2001-07-17
Classification: B01D,C03C,C04B

Abstract:
A ceramic filter comprisingat least 50 mass % of a cordierite aggregate having a particle size of at least 74 .mu.m; anda binder comprising at least 10 mass % of a fine powder of cordierite having a particle size of less than 74 .mu.m and .beta.-spodumene,wherein the mass ratio of said .beta.-spodumene to said fine powder of cordierite is from 0.6 to 2.5,and wherein said ceramic filter has a pressure loss coefficient m' of at least 30.times.10.sup.-8 cm.sup.2 as represented by the following formula and as calculated with respect to pores having diameters corresponding to at least 1/10 of the volume-based median pore diameter:m'=(V.sub.p /S.sub.p).sup.2.times.(.rho.)wherein V.sub.p (cm.sup.3 /g) is a cumulative pore specific volume, S.sub.p (cm.sup.2 /g) is a cumulative pore specific surface area, and p is a cumulative porosity.