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Structure and High Performance of Lead-Free (K0.5Na0.5)NbO3 Piezoelectric Nanofibers with Surface-induced Crystallization at Lowered Temperature
ACS Applied Materials and Interfaces
  • Yasmin Mohamed Yousry, Institute of Materials Research and Engineering and National University of Singapore
  • Kui Tao, Institute of Materials Research and Engineering
  • Xiaoli Tan, Iowa State University
  • Ayman Mahmoud Mohamed, Institute of Materials Research and Engineering
  • Yumei Wang, National University of Singapore
  • Shuting Chen, Institute of Materials Research and Engineering
  • Seeram Ramakrishna, National University of Singapore
Document Type
Article
Publication Version
Submitted Manuscript
Publication Date
6-6-2019
DOI
10.1021/acsami.9b05898
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.

Comments

This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review. To access the final edited and published work see DOI: 10.1021/acsami.9b05898. Posted with permission.

Copyright Owner
American Chemical Society
Language
en
File Format
application/pdf
Citation Information
Yasmin Mohamed Yousry, Kui Tao, Xiaoli Tan, Ayman Mahmoud Mohamed, et al.. "Structure and High Performance of Lead-Free (K0.5Na0.5)NbO3 Piezoelectric Nanofibers with Surface-induced Crystallization at Lowered Temperature" ACS Applied Materials and Interfaces (2019)
Available at: http://works.bepress.com/xiaoli_tan/91/