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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, The American Ceramic Socitey, pp. 3673-3683, (100), ISSN 00027820, DOI: 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 highresolution 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 highresolution 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
Number: 100
Publisher: The American Ceramic Socitey
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)
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 07 Aug 2017 09:33
DOI: 10.1111/jace.14887
Funders: Hessisches Ministerium für Wissenschaft und Kunst, Deutsche Forschungsgemeinschaft, Grant/Award Number: WE 4972/2
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