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Low-cost sintered permanent magnet ferrite material and preparation method thereof
The invention discloses a low-cost sintered permanent magnet ferrite material and a preparation method thereof. The material comprises a hexagon-shaped ferrite main phase containing A, Bi, Fe and M, and has the following characteristic molecular formula: A1-xBix(Fe12-yMy)zO19, wherein A represents two or more elements of Sr, Ba and Ca and has to contain Sr and Ca, M represents one or two of Al and Cr, and has to contain Al; x, y and z represents molar ratio, and x is 0.01-0.1, y is 0-0.25, and z is 0.8-1.2. According to the invention, M element oxides (Al2O3 and Cr2O3) with a relative lower cost are employed to replace expensive Co oxides, and at the same time high price and market unstable rare earth element is not added at all, thus greatly lowering the material cost. The preparation method is simple, and the cost is low. The prepared sintered permanent magnet ferrite material can obtain high residual magnetic induction intensity and good intrinsic coercivity, and the demagnetization curve rectangularity of the sintered permanent magnet ferrite material is significantly enhanced.
Low-cost sintered permanent magnet ferrite material and preparation method thereof
The invention discloses a low-cost sintered permanent magnet ferrite material and a preparation method thereof. The material comprises a hexagon-shaped ferrite main phase containing A, Bi, Fe and M, and has the following characteristic molecular formula: A1-xBix(Fe12-yMy)zO19, wherein A represents two or more elements of Sr, Ba and Ca and has to contain Sr and Ca, M represents one or two of Al and Cr, and has to contain Al; x, y and z represents molar ratio, and x is 0.01-0.1, y is 0-0.25, and z is 0.8-1.2. According to the invention, M element oxides (Al2O3 and Cr2O3) with a relative lower cost are employed to replace expensive Co oxides, and at the same time high price and market unstable rare earth element is not added at all, thus greatly lowering the material cost. The preparation method is simple, and the cost is low. The prepared sintered permanent magnet ferrite material can obtain high residual magnetic induction intensity and good intrinsic coercivity, and the demagnetization curve rectangularity of the sintered permanent magnet ferrite material is significantly enhanced.
Low-cost sintered permanent magnet ferrite material and preparation method thereof
YANG WUGUO (author) / GUO CHAOYANG (author) / JIN ZHIHONG (author) / LI JUNHUA (author) / WU YUNFEI (author) / LI YUPING (author)
2015-04-08
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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