Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Microwave Dielectric Properties of MgTiO3, MgTa2O6/Polytetrafluoroethylene Composite

  • Jeon, Chang-Jun (Department of Materials Engineering, Kyonggi University) ;
  • Kim, Eung-Soo (Department of Materials Engineering, Kyonggi University)
  • Received : 2012.04.20
  • Accepted : 2012.05.25
  • Published : 2012.05.31
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Abstract

Effects of ceramics on the microwave dielectric properties of polytetrafluoroethylene (PTFE) composites filled with $MgTiO_3$ (MTi) and/or $MgTa_2O_6$ (MTa) were investigated. The dielectric constant ($K$), quality factor ($Qf$), and temperature coefficient of resonant frequency ($TCF$) of the composites were dependent on the type and volume fraction ($V_f$) of the ceramics. For the composites mixed with MTa and MTi, the $K$ and $TCF$ values decreased with increasing MTi content. The $Qf$ values of the composites were affected by relative density. The measured $K$ values of the composites were compared with those predicted by several theoretical models. Good microwave dielectric properties with values of $K$=3.6, $Qf$ = 7,788 GHz, and $TCF$ = -0.19 ppm/$^{\circ}C$ were obtained for the composites with 0.1 $V_f$ ceramics (mixed 0.025MTa and 0.075MTi).

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References

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