Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The structural and Microwave Dielectric Properties of (1-x)Ba($Mg_{1/3}Ta_{2/3})O_3$-xBa($Co_{1/3}Nb_{2/3})O_3$(x=0.25~0.5) Ceramics

(1-x)Ba($Mg_{1/3}Ta_{2/3})O_3$-xBa($Co_{1/3}Nb_{2/3})O_3$(x=0.25~0.5) 세라믹스의 구조 및 마이크로파 유전특성

  • 황태광 (광운대학교 전자재료공학과) ;
  • 최의선 (광운대학교 전자재료공학과) ;
  • 임인호 (삼화 콘덴서 공업(주) R&D 센터) ;
  • 이영희 (광운대학교 전자재료공학과)
  • Published : 2001.03.01
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Abstract

The microwave dielectric properties of (1-x)Ba(Mg$_{1}$3/Ta$_{2}$3/)O$_3$-xBa(Co$_{1}$3/Nb$_{2}$3)O$_3$(x=0.25~0.5) ceramics depending on the Ba(Co$_{1}$3/Nb$_{2}$3/)O$_3$[BCN] contents and the possibility of application as a microwave dielectric resonator were investigated. The specimens were prepared by he conventional mixed oxide method using there sintering temperature of 1575$^{\circ}C$. It was found that Ba(Mg$_{1}$3/Ta$_{2}$3/)O$_3$[BMT] and BCN formed a solid solution with complex perovskite structure. As the mole fraction of BCN increased, dielectric constant increased while temperature coefficient of resonant frequency decreased. The highest value of quality factor, Qxf$_{0}$=138,205GHz, obtained in the sample of 0.9BMT-0.1BCN ceramics. In the range of x$\geq$0.4, the dielectric constant was about 30. The 0.55BMT-0.45BCN ceramics showed excellent microwave dielectric properties with $\varepsilon$$_{r}$=30.84, Qxf$_{0}$=75,325GHz and $\tau$$_{f}$=2.9015ppm/$^{\circ}C$.EX>.EX>.

Keywords

References

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