Structural evolution of thermal sprayed bismuth sodium titanate piezoelectric ceramic coatings

Structural evolution of thermal sprayed bismuth sodium titanate piezoelectric ceramic coatings
Title:
Structural evolution of thermal sprayed bismuth sodium titanate piezoelectric ceramic coatings
Other Titles:
Journal of the American Ceramic Society
DOI:
10.1111/jace.16135
Publication Date:
06 October 2018
Citation:
Guo, K, Sharifzadeh Mirshekarloo, M, Yao, K, Tay, FEH. Structural evolution of thermal sprayed bismuth sodium titanate piezoelectric ceramic coatings. J Am Ceram Soc. 2019; 102: 2370– 2376. https://doi.org/10.1111/jace.16135
Abstract:
The structural evolution of lead-free piezoelectric bismuth sodium titanate (BNT) coatings with excess Bi derived from thermal spray process was investigated with transmission electron microscopy (TEM). Bi-rich composition was identified as the nucleation agent of the BNT perovskite phase, and fine-grained microstructure was obtained with more excess Bi. The Bi-rich composition of the perovskite phase crystallized from melt was BixNayTiO3 (0.5≤ X≤ 0.55, 0.46≤ y≤ 0.5). The crystallization of the Bi-rich BNT perovskite phase first from liquid precursor phase would result in continuous depletion of Bi composition in the residual amorphous phase, and thus Ti-rich amorphous phase in the as-deposited coating and sodium titanate secondary phase in the heat-treated coating formed in the composition without enough access Bi. The results and analyses suggest only appropriate compensation with adequate amount of excess Bi can realize single perovskite phase in thermal sprayed BNT-based coatings and hence the superior piezoelectric performance property.
License type:
PublisherCopyrights
Funding Info:
This project is partially supported by Singapore Maritime Institute under the Asset Integrity & Risk Management (AIM) R&D Programme, Project ID: SMI-2015-OF-01 (IMRE/15-9P1115), and the Maritime Sustainability R&D Programme, Project ID: SMI-2015-MA-07 (IMRE/16-7P1125).
Description:
This is the peer reviewed version of the following article: Guo, K, Sharifzadeh Mirshekarloo, M, Yao, K, Tay, FEH. Structural evolution of thermal sprayed bismuth sodium titanate piezoelectric ceramic coatings. J Am Ceram Soc. 2019; 102: 2370– 2376. https://doi.org/10.1111/jace.16135, which has been published in final form at https://doi.org/10.1111/jace.16135. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
ISSN:
0002-7820
1551-2916
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