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Crystallization, phase evolution and ferroelectric properties of sol–gel-synthesized Ba(Ti0.8Zr0.2)O3– x(Ba0.7Ca0.3)TiO3 thin films

Journal Article


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Abstract


  • A lead-free piezoelectric material with ultra-high properties, Ba(Ti0.8Zr0.2)O3–x(Ba0.7Ca0.3)TiO3(BZT–xBCT)

    nanocrystals was synthesized via a sol–gel method, and the corresponding thin films were also

    deposited on Pt/Ti/SiO2/Si substrates by a spin-coating approach. The BZT–xBCT thin film exhibited a

    high remnant polarization of 22.15 mC cm2 with a large coercive field of 68.06 kV cm1. The resultant

    gel is calcined at various elevated temperatures and studied with FTIR/XRD/Raman/DSC-TGA/AFM/SEM

    techniques for gel composition, crystallization, phase transition, thermochemistry and the morphology

    of the film. Although the room temperature crystal structure of the BZT–xBCT nanocrystals appears to

    be a standard perovskite structure by conventional X-ray diffraction (XRD), Raman spectroscopy

    demonstrates the presence of non-centrosymmetric regions arising from the off-centering of the

    titanium (zirconium) atoms. The Raman spectra findings demonstrate the degree by which the

    tetragonal phase grows with the increase of calcining temperature in BZT–0.5BCT, and the characteristic

    ferroelectric–ferroelectric phase transition in BZT–xBCT while going through the MPB process. The

    structural and constituent evolution for the conversion process from gel to ceramic, as well as the

    formation mechanism of the BZT–0.5BCT crystallite, were also elucidated.

UOW Authors


  •   Wang, Zeng-Mei (external author)
  •   Zhao, Kuan (external author)
  •   Guo, Xin-Li (external author)
  •   Sun, Wei (external author)
  •   Jiang, Hualong (external author)
  •   Han, Xue-Qin (external author)
  •   Tao, Xu-Tang (external author)
  •   Cheng, Zhenxiang
  •   Zhao, Hongyang (external author)
  •   Kimura, Hideo (external author)
  •   Yuan, Guo-Liang (external author)
  •   Yin, Jiang (external author)
  •   Liu, Zhi-Guo (external author)

Publication Date


  • 2013

Citation


  • Wang, Z., Zhao, K., Guo, X., Sun, W., Jiang, H., Han, X., Tao, X., Cheng, Z., Zhao, H., Kimura, H., Yuan, G., Yin, J. & Liu, Z. (2013). Crystallization, phase evolution and ferroelectric properties of sol–gel-synthesized Ba(Ti0.8Zr0.2)O3– x(Ba0.7Ca0.3)TiO3 thin films. Journal of Materials Chemistry C, 1 522-530.

Scopus Eid


  • 2-s2.0-84876889756

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1580&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/580

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 522

End Page


  • 530

Volume


  • 1

Place Of Publication


  • United Kingdom

Abstract


  • A lead-free piezoelectric material with ultra-high properties, Ba(Ti0.8Zr0.2)O3–x(Ba0.7Ca0.3)TiO3(BZT–xBCT)

    nanocrystals was synthesized via a sol–gel method, and the corresponding thin films were also

    deposited on Pt/Ti/SiO2/Si substrates by a spin-coating approach. The BZT–xBCT thin film exhibited a

    high remnant polarization of 22.15 mC cm2 with a large coercive field of 68.06 kV cm1. The resultant

    gel is calcined at various elevated temperatures and studied with FTIR/XRD/Raman/DSC-TGA/AFM/SEM

    techniques for gel composition, crystallization, phase transition, thermochemistry and the morphology

    of the film. Although the room temperature crystal structure of the BZT–xBCT nanocrystals appears to

    be a standard perovskite structure by conventional X-ray diffraction (XRD), Raman spectroscopy

    demonstrates the presence of non-centrosymmetric regions arising from the off-centering of the

    titanium (zirconium) atoms. The Raman spectra findings demonstrate the degree by which the

    tetragonal phase grows with the increase of calcining temperature in BZT–0.5BCT, and the characteristic

    ferroelectric–ferroelectric phase transition in BZT–xBCT while going through the MPB process. The

    structural and constituent evolution for the conversion process from gel to ceramic, as well as the

    formation mechanism of the BZT–0.5BCT crystallite, were also elucidated.

UOW Authors


  •   Wang, Zeng-Mei (external author)
  •   Zhao, Kuan (external author)
  •   Guo, Xin-Li (external author)
  •   Sun, Wei (external author)
  •   Jiang, Hualong (external author)
  •   Han, Xue-Qin (external author)
  •   Tao, Xu-Tang (external author)
  •   Cheng, Zhenxiang
  •   Zhao, Hongyang (external author)
  •   Kimura, Hideo (external author)
  •   Yuan, Guo-Liang (external author)
  •   Yin, Jiang (external author)
  •   Liu, Zhi-Guo (external author)

Publication Date


  • 2013

Citation


  • Wang, Z., Zhao, K., Guo, X., Sun, W., Jiang, H., Han, X., Tao, X., Cheng, Z., Zhao, H., Kimura, H., Yuan, G., Yin, J. & Liu, Z. (2013). Crystallization, phase evolution and ferroelectric properties of sol–gel-synthesized Ba(Ti0.8Zr0.2)O3– x(Ba0.7Ca0.3)TiO3 thin films. Journal of Materials Chemistry C, 1 522-530.

Scopus Eid


  • 2-s2.0-84876889756

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1580&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/580

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 522

End Page


  • 530

Volume


  • 1

Place Of Publication


  • United Kingdom