ABSTRACT The ternary system of yBiGaO3-(1-x-y) BiScO3-xPbTiO3 (BGS-PT) ceramics was prepared by using conventional mixing oxide processing. X-ray diffraction analysis revealed that the BGS-PT ceramics showed the perovskite structure. The Curie temperature (TC) of BGS-PT ceramics was found to increase with increasing BiGaO3 content. However, a larger BiGaO3 content led to sharply decreased piezoelectric properties, and the secondary phase was formed in the BGS-PT system. BGS-PT ceramics with x = 0.56, y = 0.19 showed a high Curie temperature TC and a large piezoelectric constant d33 of 501°C and 152 pC/N, respectively. The high TC of BGS-PT ceramics with usable piezoelectric properties suggests future high-temperature applications.
Digital Object Identifier 10.1109/TUFFC.2007.568
© 2007, by The Institute of Electrical and Electronics Engineers, Inc. All rights reserved.