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

Claim 5:
6. A method for producing a precursor for an electrolyte material for a solid oxide fuel cell comprising a perovskite oxide comprising at least one element A selected from the group consisting of Ba and Sr, an element Zr, an element Ce, at least one element M selected from the group consisting of Y and Yb, and oxygen, the method comprising:
when obtaining a precursor by grinding and mixing solid starting materials composed of basic zirconium carbonate as a starting material of the element Zr, and a first, a second and a third solid starting material containing the element A, the element Ce and the element M, respectively, grinding and mixing the starting materials until the intensity of main diffraction line derived from the starting material of the element M of the resulting precursor is 3% or less of the intensity of main diffraction line derived from the starting material of the element A of the resulting precursor in the X-ray diffraction pattern, and the median value (D50) in the particle size distribution of the resulting precursor is 1 μm or less.