Ferrite with high permeability and high dielectric constant and method for making the same
AssigneeIndustrial Technology Research Institute
InventorsMean-Jue Tung, Yu-Ting Huang, Yen-Ping Wang
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Abstract
A ferrite with a high permeability and a high dielectric constant is introduced. Raw material powders, such as TiO2, Fe2O3 and the oxide of Mn, Ni, Cu, Mg, Li or Zn is prepared and combined in the proportion Tix(MFe2O4+2x/y)y, where x+y=1 and 0<×<1. M is any one of a mixture of metals selected from Mn, Ni, Cu, and Zn. The ratio between x and y can be adjusted according to practical needs to obtain ferrites with different permeabilities and dielectric constants. The ferrite can simultaneously be a magnetic material and a dielectric material in an electronic element. This can avoid the possible drawbacks due to sintering of two different materials in the prior art.
Claims7
A ferrite which is simultaneously a magnetic material and a dielectric material, the ferrite having a chemical composition of Tix(MFe2O4+2x/y)y, where x+y=1, 0<×<1 and M refers to metal(s) selected from the group consisting of Mn, Ni, Cu, Mg, Li and Zn.
A method for fabricating a ferrite which is simultaneously a magnetic material and a dielectric material, the method comprising:
- preparing homogeneously mixing material powders of TiO2, oxide of metal M and Fe2O3 into the composition Tix(MFe2O4+2x/y)y, where x+y=1, 0<×<1, and M is selected from the group consisting of Mn, Ni, Cu, Mg, Li and Zn;
- preheating the homogeneously mixed material powders and grinding them into powders;
- compressing the powders.into a desired shape;
- and
- sintering the shaped powders at a temperature between 840° C. and 1250° C.
Dependencies are inferred from the claim text.