Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Phase Equilibria of the Ferrous Ferrite System of $(Mg_{0.29}-yMnyFe_{0.71})_{3-}\delta$O_4$

$(Mg_{0.29}-yMnyFe_{0.71})_{3-}\delta$O_4$ 훼라이트계의 상평형

  • 채정훈 (서울대학교 신소재 공동연구소) ;
  • 유한일 (서울대학교 신소재 공동연구소) ;
  • 강선호 (서울대학교 신소재 공동연구소) ;
  • 강대석 (국방과학기술연구소) ;
  • 유병두 (국방과학기술연구소)
  • Published : 1995.03.01
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Abstract

Electrical conductivity and thermoelectric power of the ferrous ferrite system of (Mg0.29-yMnyFe0.71)3-$\delta$O4 have been measured as function of the thermodynamic variables, cationic composition(y), temperature(T) and oxygen partial pressure(Po2) under thermodynamic equilibrium conditions at elevated temperatures. On the basis of the electrical properties-phase stability correlation, the stability regions of the ferrite spinel and its neighboring phases have been subsequently located in the log Po2 vs. y and log Po2 vs. 1/T planes in the ranges of 0 y 0.29, 1100 T/$^{\circ}C$ 1400 and 10-14 Po2/atm 1. The stability region, Δlog Po2(y, 1/T), of the ferrite spinel single phase widens with increasing Mn-content(y) and the boundaries of each region are linear against 1/T with negative slopes.

Keywords

References

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