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MnZn ferrite material and preparation method thereof
The invention discloses a MnZn ferrite material and a preparation method thereof. The material comprises the following main components: 67-72wt% of Fe2O3, 5-16wt% of ZnO and 12-28wt% of MnO. The preparation method comprises the following steps: mixing the main components according to a mass ratio; and sequentially pressing, pre-sintering, doping, sanding, granulating, molding and sintering the mixed materials, wherein the sintering step is performed in a bell-type furnace and comprises three stages such as heating, heat preservation and cooling, the oxygen content at the heat preservation stage is 21 percent, the upper end of the bell-type furnace is connected with an exhaust fan, and the negative pressure in the furnace is 200Pa below zero to 20Pa below zero. According to the MnZn ferrite material prepared by the method, the magnetic conductivity in a wide frequency range of 1kHz to 1MHz is more than 4000, the electrical resistivity is more than 10ohm.m, and the problem that the MnZn ferrite material with high magnetic conductivity and electrical resistivity in the wide frequency range cannot be obtained by the conventional preparation method is solved.
MnZn ferrite material and preparation method thereof
The invention discloses a MnZn ferrite material and a preparation method thereof. The material comprises the following main components: 67-72wt% of Fe2O3, 5-16wt% of ZnO and 12-28wt% of MnO. The preparation method comprises the following steps: mixing the main components according to a mass ratio; and sequentially pressing, pre-sintering, doping, sanding, granulating, molding and sintering the mixed materials, wherein the sintering step is performed in a bell-type furnace and comprises three stages such as heating, heat preservation and cooling, the oxygen content at the heat preservation stage is 21 percent, the upper end of the bell-type furnace is connected with an exhaust fan, and the negative pressure in the furnace is 200Pa below zero to 20Pa below zero. According to the MnZn ferrite material prepared by the method, the magnetic conductivity in a wide frequency range of 1kHz to 1MHz is more than 4000, the electrical resistivity is more than 10ohm.m, and the problem that the MnZn ferrite material with high magnetic conductivity and electrical resistivity in the wide frequency range cannot be obtained by the conventional preparation method is solved.
MnZn ferrite material and preparation method thereof
LIN KAIPIN (author) / ZHU ZAIYUAN (author) / ZHAO CHUNBING (author)
2015-04-29
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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