CPC C04B 41/87 (2013.01) [B01D 67/0083 (2013.01); B01D 69/02 (2013.01); B01D 71/024 (2013.01); C04B 38/0051 (2013.01); C04B 41/4582 (2013.01)] | 8 Claims |
1. A porous ceramic laminate comprising a first porous layer and a second porous layer, wherein
the second porous layer is laminated on, in contact with or via air, the first porous layer,
a part of the second porous layer is laminated on, in contact with, the first porous layer,
each of the first porous layer and the second porous layer contains a metal oxide,
a ratio Da/Db of an average pore diameter Da of the first porous layer relative to an average pore diameter Db of the second porous layer is 10 or more,
Da is 1.5 μm or more, and
a proportion of a portion in which a distance between the first porous layer and the second porous layer is smaller than 1 μm is 70% or less.
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