Patent ID: 11866342
Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCY
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 0:
1. A ternary composite oxide a metal element expressed by a composition of General Formula (1-2):

AnXyMm  (1-2)

wherein,
A represents a lanthanoid, wherein a ratio (A3+/Atotal) of a number of moles of the element in a trivalent state (A3+) to a total number of moles of the A (Atotal) satisfies 0.1≤A3+/Atotal≤1.0,
X represents an element that is a Group-2 element in the periodic table selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid that is different from A,
M represents an element that is a Group-1 element in the periodic table, a Group-2 element selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid that is different from A and X,
n satisfies 0<n<1,
y satisfies 0<y<1,
m satisfies 0≤m<1, and

n+y+m=1), and

the ternary composite oxide is in a mixed state in which:
(1) a solid solution of A and an oxide of one of X and M; and
(2) an oxide of the other of X and M are mixed.