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J. Korean Ceram. Soc. > Volume 35(8); 1998 > Article
Journal of the Korean Ceramic Society 1998;35(8): 843.
알콜탈수법에 의한 Mn-Zn Ferrite 분체제조 및 소결특성
이대희, 김창현1, 이병교
경북대학교 무기재료공학과
1가야대학교 공학부 세라믹공학과
Synthesis of Mn-Zn Ferrite Powder by Alcoholic Dehydration and Properties of Sintered Body
ABSTRACT
Fine powders of Mn-Zn ferrite were prepared by the alcoholic dehydration method and densification beha-vior of synthesized powder was investigated. The concentration and pH of solution for optimal precipitation was 0.4M and 2.5 respectively. The spinel single phase metastable state was formed by thermal decom-position of precipitate and then spinel phase was disintegrated into hematite and spinel {{{{ { { ZnFe}_{2 }O }_{4 } }} at 600$^{circ}C$ With increase of temperature reaction of solid solution between hematite and spinel was proceeded and resulted in the spinel single phase (Mn, Zn Fe){{{{ { {Fe }_{2 }O }_{4 } }} On account of high reactivity of uncalcined powders densification started at 200$^{circ}C$ lower and completed at 50$^{circ}C$ lower in comparison with calcined powders.
Key words: Alcohoic dehydration, Mn-Zn ferrite, Precipitate, Densification
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