Effects of Bi 3+ content and grain size on electrical properties of SrBi 2Ta 2O 9 ceramic

Hairui Liu, Qiang Li, Jun Ma, Xiangcheng Chu

Research output: Contribution to journalArticle

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Abstract

SrBi 2Ta 2O 9 ceramics with various excess Bi 2O 3 content were synthesized by conventional solid state method. The effects of excess Bi 3+ content on structure and electrical properties were investigated. XRD analysis indicated that a typical bismuth layer polycrystalline structure was gained. Plate-like grains with different size were observed by SEM. With the occurrence of a liquid phase during sintering process, the excess Bi 2O 3 content greatly influenced densification and grain size of as-prepared ceramics, which determine microstructure and electrical properties of these samples to some extent. The results also found that the electrical properties were consistent with grain size. The sample with 5% excess Bi 2O 3 could exhibit a better hysteresis loop, with relative density and dielectric constant of about 96.8% and 149, respectively.

Original languageEnglish (US)
Pages (from-to)21-24
Number of pages4
JournalMaterials Letters
Volume76
DOIs
Publication statusPublished - Jun 1 2012

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All Science Journal Classification (ASJC) codes

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

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