Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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The Study on the Microstructure and Magnetic Properties of Polycrystalline $Y_3Fe_5O_{12}$

다결정 $Y_3Fe_5O_{12}$의 미세구조와 자기적 특성 연구

  • 이재동 (부산대학교 공과대학 무기재료공학과) ;
  • 김성재 (부산대학교 공과대학 무기재료공학과) ;
  • 이승호 (경북 지방 공업기술원) ;
  • 김태옥 (부산대학교 공과대학 무기재료공학과)
  • Published : 1993.12.01
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Abstract

The formation process of polycrystalline YIG(Y3Fe5O12) prepared by conventional method in Fe2O3-Y2O3 system was investigated. Effect of the microstructure of sintered body on electromagnetic properties was also investigated. Orthoferrite (YFeO3) was formed between 900 and 110$0^{\circ}C$. Formation of YIG phase begin at 110$0^{\circ}C$ with sharp increased saturation magnetization simultaneously. YIG phase is identified as single phase above 120$0^{\circ}C$. The microstructures and electromagnetic properties of sintered bodies are varied due to calcination condition of starting materials. The sintered YIG of calcined sample at 110$0^{\circ}C$ has such magnetic properties as Bs=1580G, BHC=1.89Oe, Tc=570K, ΔH(9.3GHz)=78Oe.

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