$Fe_2O_3$ Aggregation and Sintering of Ba-Ferrite

$Fe_2O_3$ 응집상태와 Ba-Ferrite의 소결성

  • Hyo-Duk Nam (Department of Electronics Engineering, College of Engineering) ;
  • Sang-Hee Cho (Department of Electronics Engineering, College of Engineering)
  • 남효덕 (경북대학교 공과대학 전자공학과) ;
  • 조상희 (경북대학교 공과대학 전자공학과)
  • Published : 1981.10.30

Abstract

The effects of$ Fe_2O_3$ aggregation on the sintering of Ba-ferrite (BaFe$_{12}O_{19}$) were studied. $BaCO_3-Fe_2O_3$ mixtures were prepared by partial precipitation mixing and ball-mill mixing method using two different $Fe_2O_3 $powders. Techniques employed were TG, XRD and SEM. X-ray diffraction analysis showed that the over all reaction basically consists of the two consecutive reaction; $BaCO_3 + 6Fe_2O_3\;{\longrightarrow}\;BaFe_2O_3 + 5Fe_2O_3 + CO_2{\uparrow}\;BaFe_2O_4 + 5Fe_2O_3 \;{\longrightarrow}\;BaFe_{12}O_{19}$ It is also shown that the aggregation state of $Fe_2O_3$ raw materials, as well as the mixing method, has a remarkable effect on solid state reaction between $BaCO_3\;and\;Fe_2O_3$.

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