US 12,168,635 B2
Porous ceramic laminate and method for producing the same
Tomomichi Nasu, Ehime (JP); Atsushi Nakayama, Ehime (JP); and Kousuke Uoe, Ibaraki (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Appl. No. 17/283,485
Filed by SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
PCT Filed Oct. 9, 2019, PCT No. PCT/JP2019/039844
§ 371(c)(1), (2) Date Apr. 7, 2021,
PCT Pub. No. WO2020/080225, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 2018-194512 (JP), filed on Oct. 15, 2018.
Prior Publication US 2021/0395157 A1, Dec. 23, 2021
Int. Cl. C04B 41/87 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 71/02 (2006.01); C04B 38/00 (2006.01); C04B 41/45 (2006.01)
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
OG exemplary drawing
 
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.