1997年8月
Grain size dependence of dielectric properties of ultrafine BaTiO3 prepared by a sol-crystal method
JOURNAL OF MATERIALS SCIENCE
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- 巻
- 32
- 号
- 15
- 開始ページ
- 4053
- 終了ページ
- 4060
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1023/A:1018697706704
- 出版者・発行元
- CHAPMAN HALL LTD
Ultrafine BaTiO3 prepared by a decomposition of an organometallic crystal with unity of Ba/Ti ratio (sol-crystal method) has been characterized. While the as-prepared product resulting from the decomposition of the organometallic crystal at room temperature was BaTiO3 with pseudo-cubic structure, the well-crystallized tetragonal polymorph was obtained by firing the as-prepared product above 1000 degrees C. Residual organic compounds, CO32- and OH- ions in the samples prevent the grain growth and tetragonal distortion of BaTiO3. We obtained quite higher room temperature permittivity (3700) at 1 kHz for the sample fired at 1200 degrees C than that (630) prepared by conventional solid-state reaction starting from BaCO3 and TiO2. Such a high value was probably due to the accomplishment of homogeneous cation stoichiometry, which was achieved by this preparation method via the organometallic crystal with stoichiometric Ba/Ti ratio.
- リンク情報
- ID情報
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- DOI : 10.1023/A:1018697706704
- ISSN : 0022-2461
- Web of Science ID : WOS:A1997XP27900021