Zn還元テルミット法を用いた亜鉛鉄フェライトの粉末合成

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rights: 社団法人日本セラミックス協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110002290403/A new technique for preparing Zn_xFe_<3-x>O_4 fine powders from α-Fe_2O_3 and Zn in Ar using a spontaneous completion reaction in the thermite method has been proposed. Preparation conditions for the Zn_xFe_<3-x>O_4 fine powders were investigated by varying Zn/α-Fe_2O_3 molar ratio and heating conditions under an Ar gas flow. The Zn_xFe_<3-x>O_4 fine powders of single phase were successfully prepared by firing the powder mixture of Zn/α-Fe_2O_3=0.35 (molar ratio) at 500℃ for 1-10 h in Ar (200 cm^3/min). The particle size of Zn_xFe_<3-x>O_4 powder prepared at 500℃ for 3h was 0.3-0.6μm, and the powders showed nearly spherical in shape and little aggregation. The saturation magnetization and coercive force of the Zn_xFe_<3-x>O_4 powders were 97 emu/g and 0.11 kOe, respectively.
社団法人日本セラミックス協会の論文
1993-07-01