Patent ID: 8617414

Claim:
A powder for producing a Niâ€”Cuâ€”Zn system ferrite ceramic sintered body, said powder comprising: a ferrite calcined powder; and an NiO powder; wherein a specific surface area of said ferrite calcined powder is within the range of 4.0 m 2 /g to 14.0 m 2 /g; and wherein a spinel composition of said ferrite calcined powder is such that Ni does not solve in said spinel composition, and the composition of said spinel is such that Fe 2 O 3 is within the range of 49.0 mol % to 60.0 mol % and the remaining comprises CuO and ZnO, and a ratio of ZnO relative to CuO in mol % is within the range of 1.0 to 4.0.