Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Microwave Dielectric Properties of (Ba1-xNax)(Mg0.5-2xY2xW0.5-xTax)O3 Ceramics

  • Hong, Chang-Bae (Department of Materials Engineering, Graduate School, Gangueung-Wonju National University) ;
  • Kim, Shin (Department of Advanced Ceramic Materials Engineering, Gangueung-Wonju National University) ;
  • Kwon, Sun-Ho (Department of Materials Engineering, Graduate School, Gangueung-Wonju National University) ;
  • Yoon, Sang-Ok (Department of Advanced Ceramic Materials Engineering, Gangueung-Wonju National University)
  • Received : 2019.07.01
  • Accepted : 2019.07.16
  • Published : 2019.07.31
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Abstract

The phase evolution, microstructure, and microwave dielectric properties of (Ba1-xNax)(Mg0.5-2xY2xW0.5-xTax)O3 (0 ≤ x ≤ 0.05) ceramics were investigated. All compositions exhibited a 1:1 ordered perovskite structure. As the value of x increased, the dielectric constant (εr) exhibited a tendency to increase slightly. The quality factor reached the maximum value at x = 0.01. The temperature coefficient of resonant frequency (τf) increased from -19.32 ppm/℃ to -5.64 ppm/℃ in the positive direction as x increased. The dielectric constant (εr), quality factor (Q × f0), and temperature coefficient of resonant frequency (τf) of the composition x = 0.05, i.e., (Ba0.95Na0.05)(Mg0.4Y0.1W0.45Ta0.05)O3 were 19.9, 128,553 GHz, and -5.6 ppm/℃, respectively.

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References

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