Influence of 4ZnO-B2O3 Addition on Dielectric Properties and Microstructures of Barium Strontium Titanate

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Influence of 4ZnO-B2O3 Addition on Dielectric Properties and Microstructures of Barium Strontium Titanate
出版類型SCI(Sciences Citation Index)
出版年度2009
AuthorsLay Gaik Teoh, 張莉毓, Ying-Chieh Lee 李英杰, Yen-Lin Huang 黃彥霖, Hui-Hsiang Huang H. - H. H., & Fuh-Sheng Shieu 薛富盛
出版日期2009 / 8
其他編號0000
中文摘要

This study investigates the effect of 4ZnO-B2O3 on sintering behaviour, the dielectric properties and
microstructures of Ba0.6Sr0.4TiO3 (BST) ceramics. These ceramics were sintered in air at
temperatures ranging from 900° to 1080 °C. BST ceramics with 4ZnO-B2O3 addition can be
sintered to a theoretical density higher than 95% at 1050 °C. A second phase (Ba2ZnTi5O13)
produced in the BST ceramics during 4ZnO-B2O3 addition. Compositional analysis using TEMEDX
of the BST ceramics with 3 wt.% 4ZnO-B2O3 revealed that the Zn ion is generally located at
the triple points. This result indicates that BaO, TiO2 and ZnO form a liquid phase that acts as a
secondary phase at the lower sintering temperatures. The amount of second phase was observed to
increase as the amount of 4ZnO-B2O3 additives was increased. In addition, the original
Ba0.6Sr0.4TiO3 phase was shifted to the Ba0.5Sr0.5TiO3 phase by the addition of 3 wt.% 4ZnO-B2O3
at 1050 °C. The Ba0.6Sr0.4TiO3 ceramic with 2 wt.% 4ZnO-B2O3 sintered at 1050 °C in air for 2 h
exhibited dielectric properties of ε
r = 1883, and dissipation loss = 0.36%. Moreover, BST with 1
wt.% 4ZnO-B2O3 addition sintered at 1080 °C exhibits dielectric properties of εr = 2330, dissipation
loss = 0.29%, and bulk density >95% of theoretical density.

期刊名稱International Journal of Applied Ceramic Technology
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