Spinel composite ferrite material and preparation method thereof
A ferrite material and spinel technology, applied in the fields of magnetic materials, inorganic material magnetism, inductance/transformer/magnet manufacturing, etc. Coercive force, improving reliability, reducing the effect of excitation current
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[0057]In the spinel composite ferrite material of the present invention, the main component is calculated by oxide mole percentage, and the additive components are calculated by main component mass percentage. The present invention has low loss, high Curie temperature and low coercive force Li series and Ni series spinel composite ferrite material and preparation method thereof, comprising the following steps:
[0058] 1. Formula
[0059] The main formula of Li series adopts 67.0~74.0mol% Fe 2 o 3 , 16.0~24.0mol% ZnO, 2.0~17.0mol% Li 2 CO 3 ;
[0060] The main formula of Ni series adopts 47.0~48.5mol% Fe 2 o 3 , 18.0-19.5mol% ZnO, 25.0-26.5mol% NiO, 5.5-10.0mol% CuO;
[0061] 2. One ball milling
[0062] Mix the above Li-based and Ni-based powders in a ball mill for 2 to 4 hours;
[0063] 3. Pre-burning
[0064] Dry the ball abrasives obtained in step 2, and pre-fire them in a furnace at 800-1000°C for 2-3 hours;
[0065] 4. Doping
[0066] Mix the Li-based and Ni-...
Embodiment 1~6
[0081] Embodiments 1-6: low loss, high Curie temperature and low coercive force Li-based and Ni-based spinel composite ferrite materials and preparation methods thereof, comprising the following steps:
[0082] Embodiment 1~6:
[0083] 1. Formula
[0084] The main formula of Li series adopts 72.0mol% Fe 2 o 3 , 23.0mol% ZnO, 5.0mol% Li 2 CO 3 ;
[0085] The main formula of Ni series adopts 47.0mol% Fe 2 o 3 , 18.5mol% ZnO, 25.5mol% NiO, 9.0mol% CuO;
[0086] 2. One ball milling
[0087] Mix Li-based and Ni-based powders in step 1 evenly in a ball mill for 4 hours respectively;
[0088] 3. Pre-burning
[0089] Dry the ball mill material obtained in step 2, and pre-fire the Li-based and Ni-based powders in a furnace at 850 and 950 °C for 3 hours, respectively;
[0090] 4. Doping
[0091] The Li system obtained in step 3 is mixed with the Ni-based powder in different mass percentages,
[0092] Examples 1-6 The compounding of different mass percentages of Li series an...
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