Patent ID: 9412486
Filing Date: 2016-08-09
CPC Classification: C01F,C01G,C01P,H01B,H01M,Y02E,Y02P

Claim Text:
1. A composite oxide powder comprising lanthanum, strontium and/or calcium, manganese and oxygen, wherein when the lanthanum content (w a (wt %)) and the manganese content (w b (wt%)) calculated from the peak area ratio of the Lα ray of lanthanum and the Kα ray of manganese in each of 12 lattice points divided into a lattice form each 8 μm on a side, as portions to be analyzed, in a scanning electron microscope (SEM) image of the composite oxide powder measured by an energy dispersive X-ray spectrometer (EDX) attached to the scanning electron microscope, satisfy the relation of formula (1), the coefficient of variation (α) of the lanthanum content in the 12 lattice points is at most 6.0%, and the coefficient of variation (β) of the manganese content in the 12 lattice points is at most 13.0%: