Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (06): 623-628.DOI: 10.3724/SP.J.1077.2013.12476

• Research Paper • Previous Articles     Next Articles

Effect of BiYbO3 Solid Solution Limit on Electric Properties and Structure of BSPT Piezoceramics

SHI Wei1,2, LENG Sen-Lin1, LONG Yu1, ZHU Jian-Guo2, XIAO Ding-Quan2   

  1. (1. Department of Physics and Electronics, College of Tongren, Tongren 554300, China; 2. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China)
  • Received:2012-08-02 Revised:2012-10-29 Published:2013-06-20 Online:2013-05-20
  • About author:SHI Wei. E-mail:
  • Supported by:

    Fundation of Science and Technology Department of Guizhou Province [2011(2031)]; Fundation of Personnel Department of Guizhou Province [TZJF2010041]; Doctoral Scientific Fund of College of Tongren [DS1001]

Abstract: yBiYbO3-(0.36–y)BiScO3-xPbTiO3 (BSYPT-0.64/y) piezoelectric ceramics were prepared by traditional solid reaction method. The result of X-ray diffraction shows that the as-prepared BSYPT-0.64/y ceramics have single perovskite structure. However, scanning electron microscopy results show that the surface morphology of BSYPT-0.64/y ceramics becomes abnormal at y=0.1, and a large amount of tiny grains, with the grain size distributing from 0.3 μm to 0.5 μm, separate out on the surface of the ceramics at y=0.14. EDS analysis reveals that the major ingredients of these tiny grains are mainly Bi, Yb, Ti, Sc and O. The solid solution limit is therefore confirmed to be near y=0.1 for the BSYPT-0.64/y ceramics. By means of systematic piezoelectric, ferroelectric and temperature-dependent dielectric (Tc~450℃) characterizations, it is found that the occurrence of solid solubility limit-related BiYbO3 separation is not a key factor for affecting the electrical properties and structure of the ceramics, but a relatively isolated behavior. The degradation of structural and electrical properties is attributed to the decrease in Sc/Pb ratio when the BiYbO3 content is increased, which leads to a deviation from MPB in the BSYPT-0.64/y ceramics.

Key words: solid solution limit, piezoelectric ceramics, Curie temperature, ferroelectric propert

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