Effect of Y-doping on the Ferroelectric Properties of BSPTHigh-temperature Piezoelectric Ceramics

doi:10.3724/SP.J.1077.2011.00185

Abstract

Abstract: (1- x)Bi(Sc_{1- y}Y _y)O₃- xPbTiO₃(BSYPT- x/y) ceramics were prepared by theconventional mixed oxide method, and their crystal structure, microstructure, andferroelectric properties were investigated. XRD analyses show that the crystalstructure of BSYPT- x/y ceramicschanges from rhombohedral to tetragonal symmetry with increasing of PbTiO₃amount. The introduction of BiYO₃ into BiScO₃-PbTiO₃solid solution would cause a shift of morphotropic phase boundary (MPB) of BSYPT- x/y system from x=0.62, y=0.05 to x=0.56, y=0.20. The BYSPT- x/ y ceramics with x=0.58 and y=0.15 showthe pinched hysteresis loops, which can be attributed to the pinned domainwalls of the dipolar defects following the substitution of Sc³⁺and Ti⁴⁺ions for Y³⁺ ions in B site of BYSPT system.

Key words: BSYPT- x/ y, high Curie temperature, piezoelectric ceramics, ferroelectric properties

CLC Number:

TB332

LI Qi-Shou,XIAO Ding-Quan, ZHU Jian-Guo. Effect of Y-doping on the Ferroelectric Properties of BSPTHigh-temperature Piezoelectric Ceramics[J]. Journal of Inorganic Materials, 2011, 26(2): 185-190.

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