Fine-sized Bi0.5Na0.5TiO3 powders prepared by spray pyrolysis from polymeric precursors

Dae Soo Jung, Hye Young Koo, Yun Chan Kang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Bi0.5Na0.5TiO3 (BNT) powders with nanometre and micrometre sizes were prepared by an ultrasonic spray pyrolysis process. The BNT powders obtained from the spray solution without citric acid had a spherical shape and micrometre size. On the other hand, the BNT powders obtained from a spray solution with 0.4M citric acid of had nanometre size at a calcinations temperature of 700 °C. Single phase BNT powders with a rhombohedral structure were obtained at a calcination temperature of 700 ° C. The sintering of pellets obtained from the micrometre sized BNT powders started at a temperature of 900 ° C. On the other hand, sintering and grain growth of the pellet obtained from the nanometre sized BNT powders occurred even at the low temperature of 850 °C. The relative densities of the pellets obtained from the nanometre sized BNT powders were 95 and 96% of the theoretical density of BNT at sintering temperatures of 950 and 1000 °C. The mean grain sizes of the pellets sintered at temperatures of 950 and 1000 °C were the same at 1.10 μm.

Original languageEnglish
Pages (from-to)425-431
Number of pages7
JournalJournal of Ceramic Processing Research
Volume11
Issue number4
Publication statusPublished - 2010

Keywords

  • Nano powder
  • Spray pyrolysis

ASJC Scopus subject areas

  • Ceramics and Composites

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