具有高直流疊加特性與高自然共振頻率之鐵氧磁體材料

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

105125529

專利證號

I 582801

專利獲證名稱

具有高直流疊加特性與高自然共振頻率之鐵氧磁體材料

專利所屬機關 (申請機關)

國立成功大學

獲證日期

2017/05/11

技術說明

鎳銅鋅鐵氧磁體之組成為〔((NiO)1-y(CuO)y)1-x(ZnO)x(Fe2O3)1-z，0≦x≦1，0≦y≦0.3，0≦z≦0.1〕，添加0.2-5wt%結晶結構為六方晶相，Y-相鐵氧磁體組成為〔2(BaO,M1O)•2(CoO,M2O)•yFe2O3，M1：Sr,Bi；M2：Zn,Cu；2.5≦y≦3.5〕之軟性鐵氧磁體，而該NiCuZn鐵氧磁體磁性材料具有較高導磁係數、低磁損失及高直流疊加特性之低溫燒結，可應用於無線充電、近場通信及直流電源轉換器上。 Magneto-plumbite ferrites with hexagonal structures have revealed a higher dispersion frequency than NiCuZn ferrites, which can be used in high frequency applications. Among those ferrites, the hexagonal ferrite〔2(BaO,M1O)•2(CoO,M2O)•yFe2O3，M1：Sr,Bi；M2：Zn,Cu；2.5≦y≦3.5〕 has good magnetic properties (such as permeability and quality factors) above 200MHz. The results show that no second phase was observed for the hexagonal- NiCuZn ferrite composite sintering at 900°C and the densification temperature can not only be reduced to 850oC, but also can effectively enhance the initial permeability by adding trace addition of nickel-copper-zinc ferrites. The initial permeability increased with increasing the addition of the NiCuZn ferrite. When the NiCuZn ferrites addition was up to 20wt%, the initial permeability of 4-5 (1MHz- 1 GHz) could be obtained for the hexagonal- NiCuZn ferrite composite sintering at 900°C.

備註

本部(收文號1110019003)同意該校111年3月31日成大產創字第1111101009號函申請終止維護專利(國立成功大學)

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