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Sintered permanent magnetic ferrite material and preparation method thereof
The invention discloses a sintered permanent magnetic ferrite material and a preparation method thereof. The sintered permanent magnetic ferrite material has a chemical formula of A1-X-yCaxBiy(FE12-zZnz)nO19, wherein A is one or more than one element of Sr and Ba. x, y, z and n are molar ratios, wherein x is 0-0.08, y is 0.01-0.05, z is 0.01-0.1, and n is 0.97-1.0.The material is prepared from the specific processes of material blending, pre-sintering, ball milling, forming, and sintering. According to the invention, ion substitution of Ca, Bi, Zn and the like is carried out; the ball milling process is adjusted; the addition of secondary addition materials is controlled; and grain size and material orientation degree are controlled during a production process. The method has the following advantages: 1, ion substitution is carried out, wherein the substitution is realized mainly with Ca, Bi, and Zn, such that cost is reduced; 2, graded ball milling is combined with secondary ball milling, such that single-domain particles with a uniform size are obtained; material orientation degree is improved; and Br is increased; 3, secondary addition materials are controlled, and appropriate sintering curve temperatures are adopted, such that grains are refined, and sintering density is improved.
Sintered permanent magnetic ferrite material and preparation method thereof
The invention discloses a sintered permanent magnetic ferrite material and a preparation method thereof. The sintered permanent magnetic ferrite material has a chemical formula of A1-X-yCaxBiy(FE12-zZnz)nO19, wherein A is one or more than one element of Sr and Ba. x, y, z and n are molar ratios, wherein x is 0-0.08, y is 0.01-0.05, z is 0.01-0.1, and n is 0.97-1.0.The material is prepared from the specific processes of material blending, pre-sintering, ball milling, forming, and sintering. According to the invention, ion substitution of Ca, Bi, Zn and the like is carried out; the ball milling process is adjusted; the addition of secondary addition materials is controlled; and grain size and material orientation degree are controlled during a production process. The method has the following advantages: 1, ion substitution is carried out, wherein the substitution is realized mainly with Ca, Bi, and Zn, such that cost is reduced; 2, graded ball milling is combined with secondary ball milling, such that single-domain particles with a uniform size are obtained; material orientation degree is improved; and Br is increased; 3, secondary addition materials are controlled, and appropriate sintering curve temperatures are adopted, such that grains are refined, and sintering density is improved.
Sintered permanent magnetic ferrite material and preparation method thereof
GUO CHAOYANG (Autor:in) / YANG WUGUO (Autor:in) / LI JUNHUA (Autor:in) / WU YUNFEI (Autor:in)
14.10.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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