Comparision between Synthesis Processes of Ba-Ferrite from Coprecipitates $Fe(OH)_2-BaCO_3$ and $Fe(OH)_3-BaCO_3$

$Fe(OH)_2-BaCO_3$$Fe(OH)_3-BaCO_3$ 의 공심물로부터 Ba-Ferrite 생성과정의 비교

  • 김태옥 (부산대학교 공과대학 무기재료공학과)
  • Published : 1982.03.01

Abstract

For the preparation of ferroxidure BaO.5.5 $Fe_2O_3$ with high coercive force, the green and calcined coprecipitates, which were obtained by neutralizing the mixed salt solution $FeCl_2-BaCl_2$ and $FeCl_3-BaCl_2$ with alkali solution $NaOH-Na_2CO_3$, were investigated about the thermal reaction, crystal growth, and the magnetic properties of the sintered specimens. The very single-domain crystallites of Ba-ferrite with high coercive force are formed from the coprecipitate of amorphous $Fe(OH)_3$ and amorphous $BaCO_3$ at lower temperature than that of subnucleus crystalline $\delta$-FeOOH and amorphous $BaCO_3$.

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References

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