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Materials (Basel). 2015 Dec 4;8(12):8467-8495. doi: 10.3390/ma8125469.

Bismuth Sodium Titanate Based Materials for Piezoelectric Actuators.

Author information

1
Institute of Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, Graz 8010, Austria. k.reichmann@tugraz.at.
2
Materials and Engineering Research Institute, Sheffield Hallam University, City Campus, Howard Street, Sheffield S1 1WB, UK. A.Feteira@shu.ac.uk.
3
Advanced Materials Research Group, Department of Mechanical, Materials and Manufacturing Engineering, The University of Nottingham, University Park, Nottingham NG7 2RD, UK. Ming.Li@nottingham.ac.uk.

Abstract

The ban of lead in many electronic products and the expectation that, sooner or later, this ban will include the currently exempt piezoelectric ceramics based on Lead-Zirconate-Titanate has motivated many research groups to look for lead-free substitutes. After a short overview on different classes of lead-free piezoelectric ceramics with large strain, this review will focus on Bismuth-Sodium-Titanate and its solid solutions. These compounds exhibit extraordinarily high strain, due to a field induced phase transition, which makes them attractive for actuator applications. The structural features of these materials and the origin of the field-induced strain will be revised. Technologies for texturing, which increases the useable strain, will be introduced. Finally, the features that are relevant for the application of these materials in a multilayer design will be summarized.

KEYWORDS:

bismuth sodium titanate; lead-free; multilayer; piezoelectric actuator

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