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本文用Mssbauer效应来研究针状高密度的γ—Fe_2O_3磁粉包附SiO_2后矫顽力提高的机制,并且也进一步证实了用电子显微镜及表面化学腐蚀方法所分析得出的关于SiO_2只固溶在磁粉表层的结论。
In this paper, the Mssbauer effect was used to study the mechanism of the coercivity increase of acicular high density γ-Fe_2O_3 magnetic powder coated with SiO_2, and further confirmed the results of electron microscopy and surface chemical etching method on the SiO_2 only solid Soluble powder surface conclusion.