Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20650
Title: Diffusion phase transition and dielectric characteristics of Bi0.5Na0.5TiO3-Ba(Hf,Ti)O3 lead-free ceramics
Authors: Tian, HY
Wang, DY
Lin, DM
Zeng, JT
Kwok, KW 
Chan, HLW 
Keywords: Bi0.5Na0.5TiO3-BaHf0.05Ti 0.95O3
Diffusion phase transition
Morphotropic phase boundary
Issue Date: 2007
Publisher: Pergamon Press
Source: Solid state communications, 2007, v. 142, no. 1-2, p. 10-14 How to cite?
Journal: Solid state communications 
Abstract: Lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT)-barium hafnate titanate (Ba(Hf0.05,Ti0.95)O3, BHT5) were prepared by a two-step sintering process. The BNT-BHT5 ceramics sintered at 1180 {ring operator}C for 2 h in air showed a pure perovskite structure. The results show that the phase transition temperature (Tm) is suppressed dramatically with a small amount of BHT5 content and then decreased gradually with more BHT5 in the compounds. The diffusion of the phase transition is more distinct for the samples around the morphotropic phase boundary (MPB) of BNT-BHT5 system. In the (1-x)BNT-xBHT5 system, high piezoelectric constants were obtained at x = 0.08, which is a tetragonal phase near the MPB region. The BNT-BHT5 system is expected to be a new and promising candidate for lead-free dielectric and piezoelectric ceramics.
URI: http://hdl.handle.net/10397/20650
ISSN: 0038-1098
EISSN: 1879-2766
DOI: 10.1016/j.ssc.2007.01.043
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