Patent ID: 11962051
Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC H

Claim 9:
10. An electrolyte material for a solid oxide fuel cell comprising a perovskite oxide represented by the composition formula (II):

AaZr1-x-yCeyMxO3-δ, wherein the element A is at least one element selected from the group consisting of Ba and Sr, the element M is at least one element selected from the group consisting of Y and Yb, and a, x and y are each a number fulfilling the conditions: 0.90≤a≤1.05, 0.05≤x≤0.3, and 0.05≤y≤0.5, respectively,
wherein the number of segregation regions of the element M evaluated based on the element mapping data obtained by the SEM-EDS method is 1 or less,
wherein the number of segregation regions of the element M is determined as follows: the resolution of the element mapping data is converted to a resolution of 128 by 96 pixels wherein the area of 1 pixel is 0.094 μm by 0.094 μm; then the region where 5 or more of the pixels each having a value of 0.6 or more are each in contact with another with its side is regarded as a segregation region of the element M, wherein the value is obtained by dividing the characteristic X-ray intensity of the element M in each of the pixels in the mapping data by the maximum X-ray intensity of the element M in the mapping data, and the number of the segregation regions is counted.