Roles of Ba/Ti ratio on the crystal structure and microstructure of barium titanate powders

C. Y. Chang, M. T. Tu, C. Y. Su, R. L. Wang, Chi-Yuen Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effect of Ba/Ti ratio on crystal structure and microstructure was studied using XRF, Raman spectra, XRD, SEM, and TEM. A series of BaTiO 3 powders were synthesized from high purity BaCO3 and TiO2 powders with Ba/Ti ratio ranging from 0.92 to 1.08 at 1200°C calcination temperature for 4 h. The XRF results confirm the Ba/Ti ratio of these synthesized BaTiO3 powders is ranging from 0.98 to 1.02. The Raman spectra demonstrate that the BaTiO3 powders are tetragonal phase and without second phase. The XRD data show a significant change in tetragonality (c/a ratio) with Ba/Ti ratio from 0.99̃0.98. The Ti-excess samples exhibit a higher tetragonality (c/a ratio = 1.0109) than that in Ba-excess samples (c/a ratio = 1.0097).

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition MS and T'08
Pages102-111
Number of pages10
Publication statusPublished - 2008 Dec 1
EventMaterials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, United States
Duration: 2008 Oct 52008 Oct 9

Publication series

NameMaterials Science and Technology Conference and Exhibition, MS and T'08
Volume1

Other

OtherMaterials Science and Technology Conference and Exhibition, MS and T'08
CountryUnited States
CityPittsburgh, PA
Period08-10-0508-10-09

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials

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