The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2024
Filed:
Aug. 07, 2020
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
DOWA ELECTRONICS MATERIALS CO., LTD., Tokyo, JP;
Abstract
A composite oxide powder including a composition formula (1), wherein the ratio α/β of a surface area value α (m/g) calculated by a BET one-point method to a surface area value β (m/g) calculated from a formula (2) is greater than 1.0 and equal to or less than 1.5 and the surface area value α is equal to or less than 20 m/g. ABO(1) (wherein A is one or more types of elements (La, Sr, Sm, Ca and Ba), B is one or more types of elements (Fe, Co, Ni and Mn) and 0≤δ<1); and surface area value β (m/g)=specific surface area value γ-surface area value ε(2) (the specific surface area value γ (m/g) is a value in a total pore size range measured by a mercury intrusion method. The specific surface area value ε (m/g) is a value in a range of pore sizes that are larger than a 50% cumulative particle size.