標題: Sintering Behavior, Microstructure, and Dielectric Properties of Nano-Ba0.7Sr0.3TiO3 Ceramics
作者: Ying, Kuo-Liang
Hsieh, Tsung-Eong
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: nanoscale ceramics;Ba0.7Sr0.3TiO3 (EST);sintering;dielectric properties
公開日期: 1-Oct-2008
摘要: Nanoscale Ba0.7Sr0.3TiO3 (BST) powders were synthesized by solid-state reaction, chemical dispersion, and mechanical grinding. Capacitor samples based on the nano-BST powders were then prepared; their sintering behaviors at different temperatures, dielectric properties, and correlations to microstructure were investigated accordingly. It was found that specific sintering conditions are essential for achieving high-density (>= 95%) BST samples with a desired microstructure. Dielectric property measurements revealed that the best result was achieved in samples sintered at 1200 degrees C for 6h (dielectric constant = 9700; dielectric loss = 0.04) or at 1300 degrees C for 1 h (dielectric constant = 9800; dielectric loss = 0.075). The BST samples exhibited a lower Curie point (T-C) than conventional BaTiO3 (BTO) and BST systems. The improvement of dielectric properties and phase transition temperature were attributed to the fine grain structure in BST samples.
URI: http://dx.doi.org/10.1143/JJAP.47.7947
http://hdl.handle.net/11536/149590
ISSN: 0021-4922
DOI: 10.1143/JJAP.47.7947
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS
Volume: 47
起始頁: 7947
結束頁: 7952
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