The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
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Structural and Microwave Dielectric Properties of BMT-BCN Ceramics

BMT-BCN 세라믹스의 구조 및 마이크로파 유전특성

  • 이문기 (광운대 공대 전자재료공학과) ;
  • 류기원 (여주대 공대 전자과) ;
  • 정장호 (광운대 공대 전자재료공학과 연구원) ;
  • 이영희 (광운대 공대 전자재료공학과)
  • Published : 1999.04.01
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Abstract

In this study, the $(1-\chi)Ba(Mg_{\fraction one-third}Ta_{\fraction two-thirds}O_3-\chiBa(Co_{\fraction one-third}\Nb_{\fraction two-thirds})O_3$ ceramics($\chi$=0.3,0.4,0.5,0.6) were prepared by the conventional mixed oxide method. The ceramics were sintered at the temperature of $1500~1575^{\circ}C$ for5 hours in air. The BMT-BCN ceramics have a complex perovskite structure, and have peaks of (101), (102), (201), (202) and (212). Increasing the sintering temperature, dielectric constant was increased. Temperature coefficients of resonant frequency of the specimens were decreasing with increasing BCN content. In the case of the 0.7BMT-0.3BCN ceramics sintered at $1575^{\circ}C$ for 5 hours, dielectric constant, quality factor and temperature coefficient of resonant frequency for microwave dielectrics application were a good value of 28, 235500 at ㎓ and -$1.2 ppm/^{\circ}C$, respectively.

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References

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