Mn-Zn ferrite and production process thereof
AssigneeMinebea Co., Ltd.
InventorsOsamu Kobayashi, Osamu Yamada, Kiyoshi Ito
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Abstract
This invention provides a Mn—Zn ferrite which has a high electrical resistance and can sufficiently satisfy the use in a high frequency region exceeding 1 MHz. This invention further provides a production process of the Mn—Zn ferrite in which mixed powder whose components are adjusted so as to have a basic component composition containing 44.0 to 50.0 mol% Fe2O3, 4.0 to 26.5 mol % ZnO, 0.1 to 8.0 mol % one or two from TiO2 and SnO2 and the remainder consisting of MnO, and further to contain 0.01 to 2.00 mass % one or more of CoO, NiO, and MgO as additive is pressed, then sintered and cooled in the air or in an atmosphere containing some amount of oxygen.
Claims12
A Mn—Zn ferrite wherein a basic component composition contains 44.0 to less than 49 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.1 to 8.0 mol % of at least one from TiO2 and SnO2 and the remainder consisting of MnO, and further contains 0.01 to 2.00 mass % of at least one from CoO, NiO and MgO as additive.
A Mn—Zn ferrite wherein a basic component composition contains 44.0 to less than 49 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.1 to 8.0 mol % of at least one from TiO2 and SnO2, 0.1 to 16.0 mol % CuO and the remainder consisting of MnO, and further contains 0.01 to 2.00 mass % of at least one from CoO, NiO and MgO as additive.
A Mn—Zn ferrite consisting essentially of a basic composition containing 44.0 to less than 49.0 mol % Fe2O3, 4.0 to 26.5 mol % of ZnO, 0.1 to 8.0 mol % of at least one from TiO2 and SnO2 and the remainder consisting of MnO, and further 0.01 to 2.00 mass % of at least one from CoO, NiO and MgO as additive.
A Mn—Zn ferrite consisting essentially of a basic composition containing 44.0 to less than 49.0 mol % Fe2O3, 4.0 to 26.5 mol % of ZnO, 0.1 to 8.0 mol % of at least one from TiO2 and SnO2, 0.1 to 16.0 mol % CuO and the remainder consisting of MnO, and further 0.01 to 2.00 mass % of at least one from CoO, NiO and MgO as additive.
Dependencies are inferred from the claim text.