Method of producing Ni-Cu-Zn ferrite material
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakashi Kodama, Hideo Ajichi, Takehiro Konoike, Kunisaburo Tomono
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Abstract
A method of producing a Ni—Cu—Zn ferrite material comprises the steps of preparing a mixture of an iron compound powder having a specific surface area of about 8.5 m2/g or more, a nickel compound powder, copper compound powder and a zinc compound powder, the mixture having a specific surface area of about 8.0 m2/g or more; pre-calcining the mixture such that the pre-calcined mixture has a surface area of about 5.0 m2/g or more and a spinel crystal synthesizability within a range of about 80.5% to 98%; and milling the pre-calcined mixture to obtain a powder of a Ni—Cu—Zn ferrite material having a specific surface area of about 6.0 m2/g or more.
Claims20
A method of producing a Ni—Cu—Zn ferrite material comprising the steps of:
- providing a mixture of an iron compound powder having a specific surface area of about 8.5 m2/g or more, nickel compound powder, copper compound powder and a zinc compound powder, the mixture having a specific surface area of about 8.0 m2/g or more;
- pre-calcining the mixture such that the pre-calcined mixture has a surface area of about 5.0 m2/g or more and a spinel crystal synthesizability within a range of about 80.5% to 98%;
- and
- milling the pre-calcined mixture to obtain a Ni—Cu—Zn ferrite material powder having a specific surface area about of 6.0 m2/g or more.
Dependencies are inferred from the claim text.