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Multilayer lead-free piezoceramic composites: Influence of co-firing on microstructure and electromechanical behavior

Ayrikyan, Azatuhi and Weyland, Florian and Steiner, Sebastian and Duerrschnabel, Michael and Molina-Luna, Leopoldo and Koruza, Jurij and Webber, Kyle G. (2017):
Multilayer lead-free piezoceramic composites: Influence of co-firing on microstructure and electromechanical behavior.
In: Journal of the American Ceramic Society, 100 (8), The American Ceramic Society, pp. 3673-3683, ISSN 00027820,
DOI: 10.1111/jace.14887,
[Online-Edition: https://doi.org/10.1111/jace.14887],
[Article]

Abstract

In this study lead‐free 2‐2 and 0‐3 ceramic/ceramic composites comprised of the non‐ergodic relaxor 0.93(Bi1/2Na1/2)TiO3–0.07BaTiO3 and ergodic relaxor 0.94Bi0.5(Na0.75K0.25)0.5TiO3–0.06BiAlO3 were investigated. The macroscopic electromechanical behavior was characterized as a function of continuent content, revealing an enhancement in the unipolar strain from the multilayer composite structure. Systematic evaluation of the effects of co‐sintering on microstructural properties, such as grain size and porosity, revealed potential mechanisms by which the increase in unipolar strain was achieved. In addition, interdiffusion between the constituents was observed, providing evidence for the formation of a functionally graded ceramic by co‐sintering. These data are contrasted with high‐resolution energy dispersive X‐ray microanalysis for measurement of chemical composition across the interface of 2‐2 ceramics. These findings provide insight into how synthesis routes can be optimized for tailoring the enhancement of electromechanical properties of lead‐free electroceramic composite systems.

Item Type: Article
Erschienen: 2017
Creators: Ayrikyan, Azatuhi and Weyland, Florian and Steiner, Sebastian and Duerrschnabel, Michael and Molina-Luna, Leopoldo and Koruza, Jurij and Webber, Kyle G.
Title: Multilayer lead-free piezoceramic composites: Influence of co-firing on microstructure and electromechanical behavior
Language: English
Abstract:

In this study lead‐free 2‐2 and 0‐3 ceramic/ceramic composites comprised of the non‐ergodic relaxor 0.93(Bi1/2Na1/2)TiO3–0.07BaTiO3 and ergodic relaxor 0.94Bi0.5(Na0.75K0.25)0.5TiO3–0.06BiAlO3 were investigated. The macroscopic electromechanical behavior was characterized as a function of continuent content, revealing an enhancement in the unipolar strain from the multilayer composite structure. Systematic evaluation of the effects of co‐sintering on microstructural properties, such as grain size and porosity, revealed potential mechanisms by which the increase in unipolar strain was achieved. In addition, interdiffusion between the constituents was observed, providing evidence for the formation of a functionally graded ceramic by co‐sintering. These data are contrasted with high‐resolution energy dispersive X‐ray microanalysis for measurement of chemical composition across the interface of 2‐2 ceramics. These findings provide insight into how synthesis routes can be optimized for tailoring the enhancement of electromechanical properties of lead‐free electroceramic composite systems.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 100
Number: 8
Publisher: The American Ceramic Society
Uncontrolled Keywords: composites, ferroelectricity/ferroelectric materials, laminates, piezoelectric materials/properties, sinter/sintering
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 > Advanced Electron Microscopy (aem)
Date Deposited: 20 Dec 2018 15:50
DOI: 10.1111/jace.14887
Official URL: https://doi.org/10.1111/jace.14887
Funders: The authors gratefully acknowledge financial support for this work from the Deutsche Forschungsgemeinschaft under WE 4972/2., Dr. M. Duerrschnabel acknowledges financial support from the Hessen State Ministry of Higher Education, Research and the Arts via LOEWE RESPONSE.
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