Structure and High Performance of Lead-Free (K0.5Na0.5)NbO3 Piezoelectric Nanofibers with Surface-induced Crystallization at Lowered Temperature

Structure and High Performance of Lead-Free (K0.5Na0.5)NbO3 Piezoelectric Nanofibers with Surface-induced Crystallization at Lowered Temperature
Title:
Structure and High Performance of Lead-Free (K0.5Na0.5)NbO3 Piezoelectric Nanofibers with Surface-induced Crystallization at Lowered Temperature
Other Titles:
ACS Applied Materials & Interfaces
Publication Date:
06 June 2019
Citation:
ACS Applied Materials & Interfaces, DOI: 10.1021/acsami.9b05898, Vol. 11, No. 26, pp. 23503−23511, 2019
Abstract:
Lead-free potassium and sodium niobate (KNN) nanofiber webs with random and aligned configurations were prepared by electrospinning process from polymer-modified chemical solution. The crystallization process, structure, composition, dielectric, ferroelectric and piezoelectric properties of the nanofibers and nanofiber webs were investigated. Theoretical analysis and experimental results showed that the surface-induced heterogeneous nucleation resulted in the remarkable lower crystallization temperature for the KNN nanofibers with {100} orientation of the perovskite phase in contrast to the bulk KNN gel, and thus well-controlled chemical stoichiometry. Low dielectric loss, large electric polarization, and high piezoelectric performance were obtained in the nanofiber webs. In particular, the aligned nanofiber web exhibited further improved piezoelectric strain and voltage coefficients, and higher FOM than their thin film counterparts, promising for high performance electromechanical sensors and transducers applications.
License type:
PublisherCopyrights
Funding Info:
The authors acknowledge the research grant support in part by Singapore Maritime Institute under the Maritime Sustainability R&D Programme, Project ID: SMI-2015-MA-07 (IMRE/16-7P1125).
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.9b05898
ISSN:
1944-8244
1944-8252
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