Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Microwave Dielectric Properties of CaTi0.5Fe0.25Nb0.25O3 Ceramics with CuO Addition

  • Kang, Kui-Won (Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Hyo-Tae (Korea Institute of Ceramic Engineering and Technolog) ;
  • Hwang, Joon-Cheol (Korea Institute of Ceramic Engineering and Technolog) ;
  • Nam, Joong-Hee (Korea Institute of Ceramic Engineering and Technolog) ;
  • Yeo, Dong-Hun (Korea Institute of Ceramic Engineering and Technology)
  • Published : 2004.08.01
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Abstract

The sintering behavior, microstructure and microwave dielectric properties of Ca $Ti_{0.5}$F $e_{0.25}$N $b_{0.25}$ $O_3$ with CuO have been investigated. Among the range of additions, 3 wt％ CuO was observed to perform most satisfactory for acting as a sintering aid. The dielectric properties were found to strongly depend on the sintered densities. The dielectric constant increased with sintering temperatures, while the Q${\times}$ $f_{0}$ value affected by second phase. For Ca $Ti_{0.5}$F $e_{0.25}$N $b_{0.25}$ $O_3$ with 3 wt％ CuO sintered at 100$0^{\circ}C$ for 2 h, the dielectric properties with an $\varepsilon$$_{r}$ value of 56, a Q${\times}$ $f_{0}$ value of 3,500 GHz and a $\tau$$_{f}$ value of 10 ppm/$^{\circ}C$ were obtained and suggested for practical applications.cations.ons.ons.ons.

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References

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