Phase transition of vanadium and tungsten doped zinc titanate dielectric ceramics by low-temperature sintering

Xiangchun Liu, Weimin Wang, Feng Gao, Ming Zhao, Changsheng Tian

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3 Scopus citations

Abstract

Zinc titanate ceramics were prepared by the conventional mixed-oxide method combined with chemical processing. The influences of raw materials and the addition of V2O5 and WO3 on the phase stability, microstructures and low-temperature sintering behavior of ZnTiO3 ceramics were investigated; low-temperature sintering mechanism and phase transition mechanism of zinc titanate ceramics with V2O5 and WO3 addition was discussed. The results show that the low-temperature sintering of ceramics was very sensitive to differences in raw materials, especially for TiO2. The densification temperature of ZnTiO3 ceramics was reduced to 900°C with increasing V2O5 and WO3 addition. Also the phase transition temperature from hexagonal ZnTiO3 phase to cubic Zn2TiO4 was lowered by adding V2O5 and WO3. The low-temperature sintering mechanism of V2O5-doped zinc titanate ceramics was a liquid phase sintering mechanism, while low-temperature sintering of V2O5-doped zinc titanate ceramics can be attributed to a solid phase reactive sintering mechanism. The phase decomposition and the second phase degraded the dielectric properties of V2O5 and WO3 doped ceramics.

Original languageEnglish
Pages (from-to)1000-1005
Number of pages6
JournalKuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
Volume34
Issue number8
StatePublished - Aug 2006

Keywords

  • Chemical processing
  • Liquid phase sintering
  • Low-temperature sintering
  • Phase transition
  • Zinc titanate

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