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

研究成果: Conference contribution

摘要

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).

原文English
主出版物標題Materials Science and Technology Conference and Exhibition MS and T'08
頁面102-111
頁數10
出版狀態Published - 2008 十二月 1
事件Materials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, United States
持續時間: 2008 十月 52008 十月 9

出版系列

名字Materials Science and Technology Conference and Exhibition, MS and T'08
1

Other

OtherMaterials Science and Technology Conference and Exhibition, MS and T'08
國家United States
城市Pittsburgh, PA
期間08-10-0508-10-09

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials

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