x Zr x O3 (BCT–BZT) were prepared via sintering BCT and BZT nanoparticles, which were synthesized using a modified Pechini polymeric precursor method, at a low temperature of 1260°C. The relative densities of the ceramics prepared with different zirconium contents (x) were all above 95.3%, reaching a maximum of 97% when x?=?0.08. X-ray diffraction results confirmed the onset of phase transformation from orthorhombic to rhombohedral symmetry with increasing zirconium contents, and the polymorphic phase transition was observed at x?=?0.10. The dielectric dispersion, diffuse phase transition (DPT), and relaxor-like ferroelectric characteristics as a function of zirconium content were thoroughly studied. Optimum physical properties, remnant polarization (P r)?=?16.4?μC/cm2, piezoelectric constant (d 33)?=?~240?pC/N, and electromechanical coupling factor (k p)?=?0.22, were obtained at x?=?0.10. The findings of the current DPT behavior study of BCT–BZT ceramics are believed to be insightful to the development of ferroelectric materials." />
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Dielectric Dispersion, Diffuse Phase Transition, and Electrical Properties of BCT–BZT Ceramics Sintered at a Low-Temperature
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  • 作者:Yongshang Tian ; Yansheng Gong ; Dawei Meng ; Yuanjian Li
  • 关键词:BCT–BZT ceramics ; polymorphic phase transition ; dielectric dispersion ; diffuse phase transition
  • 刊名:Journal of Electronic Materials
  • 出版年:2015
  • 出版时间:August 2015
  • 年:2015
  • 卷:44
  • 期:8
  • 页码:2890-2897
  • 全文大小:2,400 KB
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  • 作者单位:Yongshang Tian (1)
    Yansheng Gong (1)
    Dawei Meng (1)
    Yuanjian Li (1)
    Boya Kuang (1)

    1. Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, People’s Republic of China
  • 刊物类别:Chemistry and Materials Science
  • 刊物主题:Chemistry
    Optical and Electronic Materials
    Characterization and Evaluation Materials
    Electronics, Microelectronics and Instrumentation
    Solid State Physics and Spectroscopy
  • 出版者:Springer Boston
  • ISSN:1543-186X
文摘
Lead-free ceramics 0.50Ba0.9Ca0.1TiO3-.50BaTi1?em class="EmphasisTypeItalic">x Zr x O3 (BCT–BZT) were prepared via sintering BCT and BZT nanoparticles, which were synthesized using a modified Pechini polymeric precursor method, at a low temperature of 1260°C. The relative densities of the ceramics prepared with different zirconium contents (x) were all above 95.3%, reaching a maximum of 97% when x?=?0.08. X-ray diffraction results confirmed the onset of phase transformation from orthorhombic to rhombohedral symmetry with increasing zirconium contents, and the polymorphic phase transition was observed at x?=?0.10. The dielectric dispersion, diffuse phase transition (DPT), and relaxor-like ferroelectric characteristics as a function of zirconium content were thoroughly studied. Optimum physical properties, remnant polarization (P r)?=?16.4?μC/cm2, piezoelectric constant (d 33)?=?~240?pC/N, and electromechanical coupling factor (k p)?=?0.22, were obtained at x?=?0.10. The findings of the current DPT behavior study of BCT–BZT ceramics are believed to be insightful to the development of ferroelectric materials.

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