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Title: Preparation and properties of Bi0.5Na0.5TiO 3-Ba(Hf,Ti)TiO3 lead-free piezoelectric ceramics
Authors: Tian, HY
Chen, WP
Wang, DY
Wang, Y 
Zeng, JT
Chan, HLW 
Keywords: Bismuth sodium titanate
Piezoelectric ceramic
Issue Date: 2007
Publisher: Scientific.Net
Source: Key engineering materials, 2007, v. 334-335 II, p. 957-960 How to cite?
Journal: Key engineering materials 
Abstract: Lead-free piezoelectric ceramics based on bismuth sodium titanate (BNT) -barium hafnate titanate (BHT) were prepared by a two-step synthesis process. The final BNT-BHT ceramics sintered at 1180°C for 2 h in air showed a perovskite structure with high density. The morphotropic phase boundaries (MPB) were found in BNT based piezoelectric ceramics with 8-10 wt% BHT in composites. In the case of Bi0.5Na0.5TiO3-0.08BaHf 0.05Ti0.95O3 ceramics, a maximum piezoelectric coefficient d33 of 122.6 pC/N was obtained. The remnant polarization (Pr) and coercive field (Ec) were measured and the relationship between ferroelectricity and the BHT fraction in the compounds was investigated. The BNT-BHT ceramics were expected to be a new and promising candidate for lead-free piezoelectric device applications.
ISSN: 1013-9826
EISSN: 1662-9795
Appears in Collections:Conference Paper

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