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Preparation of W-Type Ferrite BaZn_(2(1-x))(LiFe)_xFe_(16)O_(27)

Rao Mingming Cai Shouhui (Three Dept.of University of Electronic Science and Technology of China,Chengdu)  
A kind of W-type ferrite has been prepared by using the coprecipitation me-thod combined with high temperature melting.The influence of preparing conditionson the phase compositions has been reseached.This W-type ferrite can be obtainedthrough the substitution:2 Zn~(2+)(?)Li~++Fe~(3+) for Zn_2-W(BaZn_2Fe_(16)O_(27)).Such a su-bstitution has already been successful in spinal ferrite family.To obtained the pure W-phase ferrite,according to the result of the phase an-alysis of X-ray diffraction,it is necessary to keep pH of the mixed slurry in therange of 8.0-8.5,sintering temperature at 1250-1300℃ and sintering period for20-30 min.The saturation magnetization of the pure W-phase ferrite prepared isσ_s=76Am~2/kg nearly as high as those of the previously known Zn_2-W or Fe_2-Wferrites.
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