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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Effect of Densities on Dielectric Properties of $Ba[Mg_{1/3}(Nb_{0.2}Ta_{0.8})_{2/3}]O_3$Ceramics

$Ba[Mg_{1/3}(Nb_{0.2}Ta_{0.8})_{2/3}]O_3$ 세라믹스의 밀도가 유전특성에 미치는 영향

  • 김재윤 (부경대학교 전자공학과) ;
  • 김부근 (부경대학교 전자공학과) ;
  • 김강언 (부경대학교 전자공학과) ;
  • 정수태 (부경대학교 전자공학과) ;
  • 조상희 (경북대학교 무기재료공학과)
  • Published : 2000.06.01
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Abstract

The sintering characteristics and the effects of density on dielectric properties in 0.2Ba(Mg$_{1}$3(Nb$_{2}$3/)O$_3$-0.8Ba(Mg$_{1}$3//Ta$_{2}$3/)O$_3$ceramics were investigated. The samples were made by the powder mixing techniques with the two step calcining conditions. When the 1st and the 2nd calcining temperatures were 120$0^{\circ}C$ and the sintering temperature was 155$0^{\circ}C$the density of samples showed the highest value (7.45 g/cm$^3$, 98.5% of theoretical density) among them. The dielectric constant of samples was nearly independent of density but the tan $\delta$ and the temperature coefficient of dielectric constant decreased linearly with increasing of the density. The quality factor(Q$\times$f), the temperature coefficient of resonance frequency and the dielectric constant of Ba[Mg$_{1}$3(Nb$_{0.2}$/Ta$_{0.8}$)sub 2/3/]O$_3$ceramic were 79,548 GHz, +1.5 ppm/$^{\circ}C$ and 26 in the microwave range, respectively.ely.

Keywords

References

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