Microwave dielectric properties of high-Q Mg(SnxTi1-x)O3 ceramics

Zhijie Gong, Zhefei Wang, Lixi Wang, Zhenxiao Fu, Wei Han, Qitu Zhang

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23 Scopus citations

Abstract

A series of Sn-doped Mg(SnxTi1-x)O3 ceramics were prepared using the conventional solid-state route. The influence of Sn4+ substitution for Ti4+ on the microstructure and microwave dielectric properties of Mg(SnxTi1-x)O3 ceramics was systematically investigated. Substitution with a suitable amount of Sn can eliminate the MgTi2O5 phase. The dielectric constants and temperature coefficients of resonant frequency changed slightly with the variation in Sn content in the specimens. However, the quality factors (Q) dramatically improved and were sensitive to the concentration of Sn4+. The high Q value was attributed to the uniform grain, clean and narrow grain boundary, and elimination of the MgTi2O5 phase. Moreover, the composition-optimized Mg(Sn0.05Ti0.95)O3 ceramics sintered at 1390°C exhibited excellent microwave dielectric properties of e{open} r = 17.61, Q×f = 328,543 GHz, and τ f = -42 ppm/°C.

Original languageEnglish
Pages (from-to)331-335
Number of pages5
JournalElectronic Materials Letters
Volume9
Issue number3
DOIs
StatePublished - May 2013

Keywords

  • MgTiO ceramic
  • Sn substitution
  • high Q value
  • microwave dielectric

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