Phase evolution of solid-state BaTiO3 powder prepared with the ultrafine BaCO3 and TiO2

Ting Tai Lee, Chi-Yuen Huang, Che Yuan Chang, I. Kuan Cheng, Ching Li Hu, Chun Te Lee, Masayuki Fujimoto

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8 Citations (Scopus)

Abstract

The phase evolution, nucleation, and sintered ceramics of barium titanate (BaTiO3, BT) powder prepared by solid-state synthesis with an ultrafine starting material (27 m2/g of BaCO3 and 190 m2/g of TiO2) were investigated in this study. Surface diffusion between BaCO3 and TiO2 was observed at a relatively low temperature of 400 °C by transmission electron microscopy. Rapid nucleation of the BT and cubic BT phases was observed at 500 °C by x-ray diffraction. The derivative thermogravimetry curve clearly shows a single step of BT formation at 600 °C. In short, pure BT particles with an average particle size of 250 nm and high tetragonality were prepared by solid-state synthesis, which produced X7R ceramics with high dielectric permittivity, high insulation resistance, and a clear core-shell structure.

Original languageEnglish
Pages (from-to)2495-2502
Number of pages8
JournalJournal of Materials Research
Volume27
Issue number19
DOIs
Publication statusPublished - 2012 Oct 14

All Science Journal Classification (ASJC) codes

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

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