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Influence of Excess Bi2O3 on the Characteristics of (Na0.5Bi0.5)TiO3-BaTiO3 Ceramics

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Abstract:

In this study, piezoelectric materials 0.95 (Na0.5Bi0.5)TiO3-0.05 BaTiO3 (NBT-BT) composition with excess x wt% Bi2O3 (x=0, 1, 2, and 3) are investigated as a function of sintering temperatures. The sintering characteristics and dielectric characteristics of excess Bi2O3-doped 0.95 (Na0.5Bi0.5)TiO3- 0.05 BaTiO3 ceramics are developed with the aid of SEM, XRD patterns, and dielectric-temperature curves. The sintering process is carried out in air for 2h from 1120oC to 1200oC. Dielectric-temperature properties are investigated in the temperature range of 30oC~350oC at the frequencies of 10KHz~1MHz. The maximum dielectric constants of NBT-BT ceramics first increase with the increase of Bi2O3 content, reach the maximum at 1wt%- Bi2O3-added NBT-BT ceramics, and then decrease with the further increase of Bi2O3 content. The maximum dielectric constants of NBT-BT ceramics are almost unchanged as the measured frequency increases. The Curie temperatures of NBT-BT ceramics are also developed.

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Periodical:

Key Engineering Materials (Volumes 368-372)

Pages:

65-68

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.368-372.65

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Online since:

February 2008

Authors:

Yin Fang Wei, Chia Hsiung Kao, Cheng Fu Yang, Ho Hua Chung, Hong Hsin Huang, Yao Sheng Yang

Keywords:

0.95 (Na0.5Bi0.5)TiO3-0.05 BaTiO3 Ceramics, Excess Bi2O3, Piezoelectric

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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