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Growth and Characterization of Lead-free Piezoelectric Single Crystals

Veber, Philippe and Benabdallah, Feres and Liu, Hairui and Buse, Gabriel and Josse, Michael and Maglione, Mario (2015):
Growth and Characterization of Lead-free Piezoelectric Single Crystals.
In: Materials, MDPI Publishing, pp. 7962-7978, 8, (11), ISSN 1996-1944,
[Online-Edition: http://pubs.rsc.org/en/Content/ArticleLanding/2016/CE/C5CE02...],
[Article]

Abstract

Lead-free piezoelectric materials attract more and more attention owing to the environmental toxicity of lead-containing materials. In this work, we review our first attempts of single crystal grown by the top-seeded solution growth method of BaTiO3 substituted with zirconium and calcium (BCTZ) and (K0.5Na0.5)NbO3 substituted with lithium, tantalum, and antimony (KNLSTN). The growth methodology is optimized in order to reach the best compositions where enhanced properties are expected. Chemical analysis and electrical characterizations are presented for both kinds of crystals. The compositionally-dependent electrical performance is investigated for a better understanding of the relationship between the composition and electrical properties. A cross-over from relaxor to ferroelectric state in BCTZ solid solution is evidenced similar to the one reported in ceramics. In KNLSTN single crystals, we observed a substantial evolution of the orthorhombic-to-tetragonal phase transition under minute composition changes.

Item Type: Article
Erschienen: 2015
Creators: Veber, Philippe and Benabdallah, Feres and Liu, Hairui and Buse, Gabriel and Josse, Michael and Maglione, Mario
Title: Growth and Characterization of Lead-free Piezoelectric Single Crystals
Language: English
Abstract:

Lead-free piezoelectric materials attract more and more attention owing to the environmental toxicity of lead-containing materials. In this work, we review our first attempts of single crystal grown by the top-seeded solution growth method of BaTiO3 substituted with zirconium and calcium (BCTZ) and (K0.5Na0.5)NbO3 substituted with lithium, tantalum, and antimony (KNLSTN). The growth methodology is optimized in order to reach the best compositions where enhanced properties are expected. Chemical analysis and electrical characterizations are presented for both kinds of crystals. The compositionally-dependent electrical performance is investigated for a better understanding of the relationship between the composition and electrical properties. A cross-over from relaxor to ferroelectric state in BCTZ solid solution is evidenced similar to the one reported in ceramics. In KNLSTN single crystals, we observed a substantial evolution of the orthorhombic-to-tetragonal phase transition under minute composition changes.

Journal or Publication Title: Materials
Volume: 8
Number: 11
Publisher: MDPI Publishing
Uncontrolled Keywords: crystal growth; lead-free materials; piezoelectrics
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 23 Mar 2016 13:00
Official URL: http://pubs.rsc.org/en/Content/ArticleLanding/2016/CE/C5CE02...
Identification Number: doi:10.3390/ma8115436
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