Enhancing Electromechanical Properties of Lead-Free Ferroelectrics With Bilayer Ceramic/Ceramic Composites

Ayrikyan A, Rojas V, Molina-Luna L, Acosta M, Koruza J, Webber KG (2015)

Publication Status: Published

Publication Type: Journal article

Publication year: 2015

Journal

IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control Institute of Electrical and Electronics Engineers (IEEE)

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 62

Pages Range: 997-1006

DOI: 10.1109/TUFFC.2014.006673

Abstract

The macroscopic electromechanical behavior of lead-free bilayer composites was characterized at room temperature. One layer consisted of a nonergodic relaxor, (Bi1/2Na1/2)TiO3-7BaTiO(3), with an electric-field-induced long-range ferroelectric order, whereas the other is understood to be an ergodic relaxor [(Bi1/2Na1/2)TiO3-25SrTiO(3)] that undergoes a reversible electric-field-induced macroscopic nonpolar-to-polar transition. Microstructural evidence of a bilayer with low diffusion between the two components is also demonstrated. By taking advantage of the different macroscopic strain-and polarization-electric-field responses of the two constituents, internal mechanical and electrical fields can be developed that enhance the unipolar strain over that expected by a rule of mixtures approximation, thereby improving the properties needed for application of such materials to actuator systems. It is possible through further tailoring of the volume fractions and macroscopic properties of the constituents to optimize the electromechanical properties of multilayer lead-free ferroelectrics.

Authors with CRIS profile

Kyle Grant Webber Professur für Werkstoffwissenschaften (Funktionskeramik)

Involved external institutions

Technische Universität Darmstadt DE Germany (DE)

How to cite

APA:

Ayrikyan, A., Rojas, V., Molina-Luna, L., Acosta, M., Koruza, J., & Webber, K.G. (2015). Enhancing Electromechanical Properties of Lead-Free Ferroelectrics With Bilayer Ceramic/Ceramic Composites. IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 62, 997-1006. https://dx.doi.org/10.1109/TUFFC.2014.006673

MLA:

Ayrikyan, Azatuhi, et al. "Enhancing Electromechanical Properties of Lead-Free Ferroelectrics With Bilayer Ceramic/Ceramic Composites." IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control 62 (2015): 997-1006.

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