Patent ID: 11894565
Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C  H

Claim 4:
5. A method of producing a powder material for an air electrode in a solid oxide fuel cell, the method comprising:
a preparation step of preparing a metal composite oxide having a perovskite crystal structure represented by a following general formula:

A11-xA2xBO3-δ,

where the element A1 is at least one selected from the group consisting of La and Sm, the element A2 is at least one selected from the group consisting of Ca, Sr, and Ba, the element B is at least one selected from the group consisting of Mn, Fe, Co, and Ni, x satisfies 0<x<1, and δ is an oxygen deficiency amount; and
a pulverization step of pulverizing the metal composite oxide with aluminum oxide beads, into a powder having a specific surface area of 20 m2/g or more and satisfying (Crystallite diameter/Specific surface area-based particle diameter)≥0.3.