Preparation and characterization of textured Bi0.5(Na0.8 K0.2)0.5TiO3 ceramics by reactive templated grain growth

Wei Zhao, Heping Zhou, Yongke Yan

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Abstract

Bi0.5(Na0.8 K0.2)0.5TiO3 (abbreviated as BNKT) piezoelectric ceramics with extensive <001> texture were prepared by the reactive templated grain growth (RTGG), using plate-like Bi4Ti3O12 (BiT) particles as the templates. Through the analysis of X-ray diffraction pattern of the obtained materials, extensive crystallographic texture was evaluated with a relatively high Lotgering factor (f ≥ 0.9), and the incorporated (Bi0.5 K0.5)TiO3 diffused into the (Bi0.5Na0.5)TiO3 lattice to form a single solid solution. The scanning electron microscopy showed that the in-situ reaction started at the vicinity of BiT surface and proceeded with heat treatment time toward the inner part of the BiT. The high textured BNKT piezoelectric ceramics demonstrated good piezoelectric performance without decreasing the depolarization temperature when they were sintered at 1200 °C for 10 h.

Original languageEnglish (US)
Pages (from-to)1219-1222
Number of pages4
JournalMaterials Letters
Volume62
Issue number8-9
DOIs
StatePublished - Mar 31 2008

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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