Microwave Dielectric Properties of the 0.7Mg4Ta2O9-0.3SrTiO3 Ceramics with Sintering Temperature

소결온도에 따른 0.7Mg4Ta2O9-0.3SrTiO3 세라믹스의 마이크로파 유전특성

  • 김재식 (광운대학교 전자재료공학과) ;
  • 최의선 (광운대학교 전자재료공학과) ;
  • 이문기 (광운대학교 전자재료공학과) ;
  • 이영희 (광운대학교 전자재료공학과) ;
  • 배선기 (인천대학교 전기공학과)
  • Published : 2005.06.01


The structural and microwave dielectric properties of $0.7Mg_4Ta_2O_9-0.3SrTiO_3$ ceramics with sintering temperature were investigated. All the sample of the $0.7Mg_4Ta_2O_9-0.3SrTiO_3$ ceramics were prepared by conventional miked oxide method and the sintering temperature was $1425\~1500^{\circ}C$. The hexagonal phase of $Mg_4Ta_2O_9$ and the cubic phase of $SrTiO_3$ were coexisted. The porosity of $0.7Mg_4Ta_2O_9-0.3SrTiO_3$ ceramics were reduced with increasing sintering temperature. In the case of $0.7Mg_4Ta_2O_9-0.3SrTiO_3$ ceramics sintered at $1475^{\circ}C$, dielectric constant, quality factor and temperature coefficient of resonant frequency were 14.51, 82,596 GHz and $-3.14\;ppm/^{\circ}C$, respectively.


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