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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Microwave Dielectric Properties of Y2O3 and TiO2-Doped Ba(Mg0.5W0.5)O3 Ceramics

Y2O3 및 TiO2 첨가 Ba(Mg0.5W0.5)O3 세라믹스의 마이크로파 유전 특성

  • Hong, Chang-Bae (Department of Materials Engineering, Gangneung-Wonju National University) ;
  • Kim, Shin (Department of Advanced Ceramic Materials Engineering, Gangneung-Wonju National University) ;
  • Kwon, Sun-Ho (Department of Advanced Ceramic Materials Engineering, Gangneung-Wonju National University) ;
  • Yoon, Sang-Ok (Department of Advanced Ceramic Materials Engineering, Gangneung-Wonju National University)
  • 홍창배 (강릉원주대학교 재료공학과) ;
  • 김신 (강릉원주대학교 세라믹신소재공학과) ;
  • 권순호 (강릉원주대학교 세라믹신소재공학과) ;
  • 윤상옥 (강릉원주대학교 세라믹신소재공학과)
  • Received : 2018.01.18
  • Accepted : 2018.02.09
  • Published : 2018.05.01

Abstract

The phase evolution, microstructure, and microwave dielectric properties of $Ba(Mg_{0.5-2x}Y_{2x}W_{0.5-x}Ti_x)O_3$ (x = 0.005~0.05) ceramics sintered at $1,700^{\circ}C$ for 1h were investigated. All compositions exhibited a 1:1 ordered cubic perovskite structure. The field emission scanning electron microscopy image revealed a dense microstructure in all the compositions. As the value of x increased, the lattice parameter, dielectric constant, and quality factor increased. The temperature coefficient of resonant frequency changed from $-19.6ppm/^{\circ}C$ to $-5.9ppm/^{\circ}C$ with increasing x value. The dielectric constant, quality factor, and temperature coefficient of resonant frequency of $Ba(Mg_{0.40}Y_{0.10}W_{0.45}Ti_{0.05})O_3$ were 21.7, 132,685 GHz, and $-5.9ppm/^{\circ}C$, respectively.

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Acknowledgement

Supported by : 한국산업기술진흥협회

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