J. Mater. Sci. Technol. ›› 2015, Vol. 31 ›› Issue (12): 1181-1185.DOI: 10.1016/j.jmst.2015.07.019

• Orginal Article • Previous Articles     Next Articles

Structure and Piezoelectric Properties of Lead-Free Na0.5Bi0.5TiO3 Nanofibers Synthesized by Electrospinning

Di Zhoua, Youhua Zhoua, Yu Tiana, Yafang Tua, Guang Zhenga, *, Haoshuang Gub, **   

  1. a School of Physics & Information Engineering, Jianghan University, Wuhan 430056, China;
    b Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Science, Hubei University, Wuhan 430062, China
  • Received:2015-01-26 Revised:2015-04-20 Online:2015-12-19
  • Contact: Prof., Ph.D.; Tel.: +86 27 84237290; Fax: +86 27 84226780; **Prof., Ph.D.; Tel.: +86 27 88665568; Fax: +86 27 88663390.
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (NSFC, Grant Nos. 61240056, 61405076 and 11304124).

Abstract:

Lead-free Na0.5Bi0.5TiO3 (NBT) nanofibers with the perovskite structure were prepared by the electrospinning method. The nanofibers were about 200-300 nm in diameter and up to several hundred microns in length. The crystal structures and morphologies of the nanofibers were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The effective piezoelectric property of individual NBT nanofiber was examined by piezoresponse force microscopy (PFM). The NBT nanofibers crystallized in pure perovskite phase after annealing above 700 °C in air and comprised a great number of fine particles with size of 60-80 nm. In addition, the electromechanical energy conversion models for NBT nanofibers were built and demonstrated high voltage output as high as several millivolts. Such a result qualifies NBT nanofibers as a promising candidate for lead-free electromechanical conversion devices.

Key words: Sodium bismuth titanate, Perovskite, Nanofiber, Electrospinning, Piezoelectric