Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8897
Title: Thermal and dynamic mechanical analyses on Bi0.5Na0.5TiO3-BaTiO3 ceramics synthesized with citrate method
Authors: Zheng, XC
Zheng, GP 
Lin, Z
Jiang, ZY
Keywords: Lead-free ferroelectric ceramics
Citrate method
Phase transformation
Elasticity anomaly
Issue Date: 2013
Publisher: Pergamon Press
Source: Ceramics international, 2013, v. 39, no. 2, p. 1233-1240 How to cite?
Journal: Ceramics international 
Abstract: Bi0.5Na0.5TiO3-xBaTiO(3)(BNT-xBT) nano-powders are successfully synthesized by a modified citrate method. The as-prepared BNT-BT powders and the sintered ceramics are homogeneous with a pure perovskite crystal structure. The effects of Ba2+ substitutions for (Bi0.5Na0.5)(2+) in the A-sites of Bi0.5Na0.5TiO3 on its phase transformations are explored. The transformations among ferroelectric (FE), anti-ferroelectric (AFE) and paraelectric (PE) states in these ceramics are characterized using ferroelectric hysteresis tests, modulated differential scanning calorimetry and dynamic mechanical analysis. The FE-AFE transition in BNT-xBT with 0 <= x <= 0.15 is found to relate with a structural transformation which is a first-order phase transition. The mechanical and thermal analyses provide evidence that AFE state (0 <= x <= 0.15) could be associated with the incommensurate modulation of rhombohedral structures while the mechanisms of forming AFE state in BNT-xBT (x>0.15) could be different.
URI: http://hdl.handle.net/10397/8897
ISSN: 0272-8842
EISSN: 1873-3956
DOI: 10.1016/j.ceramint.2012.07.052
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