Patent ID: 11958039
Assignee: DAIICHI KIGENSO KAGAKU KOGYO CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B

Claim 0:
1. A zirconia-based porous body comprising an oxide of a rare earth element, wherein
when a pore volume in a pore distribution range of 30 nm or more and 200 nm or less after heating at 1150° C. for 12 hours under atmospheric pressure is defined as pore volume A and a pore volume in a pore distribution range of 30 nm or more and 200 nm or less before heating is defined as pore volume B,
the pore volume A is 0.10 ml/g or more and 0.40 ml/g or less,
the pore volume B is 0.40 ml/g or more and 1.0 ml/g or less, and
a pore volume retention ratio X in a pore distribution range of 30 nm or more and 200 nm or less represented by formula (1) below is 25% or more and 95% or less:
<Pore volume retention ratio X in pore distribution range of 30 nm or more and 200 nm or less>

[(Pore volumeA)/(Pore volumeB)]×100  Formula(1).