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조성비에 다른 Ba₃Co<SUB>2-2x</SUB>Mn<SUB>2x</SUB>Fe₂₄O₄₁ 세라믹스의 마이크로파 특성
김재식(Jae-Sik Kim),최의선(Eui-Sun Choi),류기원(Ki-Won Ryu),배선기(Seon-Gi Bae),이영희(Young-Hie Lee) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
The sintering behavior and microwave properties of Ba₃Co<SUB>2-2x</SUB>Mn<SUB>2x</SUB>Fe₂₄O₄₁ ceramics were investigated. All samples were prepared by the conventional mixed oxide method and sintered at 1150℃∼1400℃. From the X-ray diffraction patterns of sintered Ba₃Co<SUB>2-2x</SUB>Mn<SUB>2x</SUB>Fe₂₄O₄₁ ceramics, the Z-type phase was existed as main phase at sintering temperature of 1350℃. The permittivity and permeability of Ba₃Co<SUB>2-2x</SUB>Mn<SUB>2x</SUB>Fe₂₄O₄₁ ceramics were increased with Mn additions and decreased rapidly over frequency of 600 ㎒. The loss tangent of permittivity and of permeability did not changed hardly with composition ratio and increased over frequency of 600 ㎒. The magnetic resonance frequency of Ba₃Co<SUB>2-2x</SUB>Mn<SUB>2x</SUB>Fe₂₄O₄₁ ceramics was about 600 ㎒. The permittivity, loss tangent of permittivity, permeability and loss tangent of permeability of Ba₃Co<SUB>1.4</SUB>Mn<SUB>0.6</SUB>Fe₂₄O₄₁ ceramics sintered at 1250℃ were 27.276, 0.171, 20.448 and 0.068 at 310 ㎒, respectively.