https://scholars.lib.ntu.edu.tw/handle/123456789/407461
標題: | Preparation, sintering, and microstructures of strontium barium bismuth tantalate layered perovskite ceramics | 作者: | Lu C.-H. Bai J.-H. Chen H. |
公開日期: | 2004 | 卷: | 39 | 期: | 9 | 起(迄)頁: | 3079-3083 | 來源出版物: | Journal of Materials Science | 摘要: | The solid solutions of Ba-doped SrBi2Ta2O9 layered perovskite ceramic powders have been successfully prepared via a two-step process using BiTaO4 as a precursor. The lattice constants of the solid solutions monotonically increase with increasing barium-ion content. The sinterability of {Sr1-xBax)Bi 2Ta2O9 powders is significantly improved by increasing the barium-ion content. When the specimens with high barium-ion contents are sintered at 1100¢XC, they thermally decompose to form rod-like grains and the matrix expands, leading to a lower density. The addition of barium ions to SrBi2Ta2O9 also results in significant variation in the morphology of the sintered specimens and the occurrence of c-axis preferred orientation which is ascribed to the anisotropic growth of plate-like grains. The precise control of the barium-ion content as well as the sintering conditions is critical for obtaining densified barium-ion doped SrBi2Ta2O9 ceramics with a pure, layered perovskite structure. ? 2004 Kluwer Academic Publishers. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407461 | ISSN: | 00222461 | DOI: | 10.1023/B:JMSC.0000025835.22825.5c |
顯示於: | 化學工程學系 |
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