Patent ID: 11866346
Assignee: DOWA ELECTRONICS MATERIALS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C  H

Claim 0:
1. A composite oxide powder comprising:
a composition represented by a composition formula (1) below,
wherein a ratio α/β of a specific surface area value α (m2/g) calculated by a BET one-point method to a specific surface area value β (m2/g) calculated from a formula (2) below is greater than 1.0 and equal to or less than 1.5, and
the specific surface area value α is equal to or greater than 2.5 m2/g and equal to or less than 20 m2/g:

ABO3-δ  (1)

wherein in the composition formula (1), A is one or more types of elements selected from the group consisting of La, Sr, Sm, Ca and Ba, B is one or more types of elements selected from the group consisting of Fe, Co, Ni and Mn and 0≤δ<1; and

specific surface area value β (m2/g)=specific surface area value γ−specific surface area value ε  (2)

wherein in the formula (2), the specific surface area value γ (m2/g) is a cumulative value of specific surface area values in a total pore size range measured by a mercury intrusion method, and the specific surface area value ε (m2/g) is a cumulative value of specific surface area values in a pore size range of pore sizes that are larger than a 50% cumulative particle size (volume conversion-D50) in a particle size distribution calculated by a Microtrac particle size distribution measuring device.