Piezoelectric Properties in the Perovskite BiScO3-PbTiO 3-(Ba,Sr)TiO3 Ternary System

Tae Ho Song, Richard E. Eitel, Thomas R. Shrout, Clive A. Randall, Wes Hackenberger

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Abstract

A new ternary system (1 - x)BiScO3-x{(1-y)PbTiO3-y (Ba0.294Sr0.706)TiO3} was studied in relation to morphotropic phase boundaries (MPB). Analogous to modified PZT ceramics, barium and strontium were introduced to the recently developed MPB (1 - x)BiScO3-xPbTiO3 for x > 0.60, in order to investigate Curie temperature and piezoelectric property variations. With increasing barium and strontium substitution up to y = 0.3, the MPB line moved from x = 0.64 to 0.70 and d33 and kp gradually decreased. X-ray diffraction phase analysis correlated the variations in piezoelectric properties showing a maximum in the compositions near rhombohedral-tetragonal phase boundary. Grain sizes were around 2 μm for all compositions and tetragonality decreased with the downward shifting of Tc in the range of 216-371°C. The frequency dependence of dielectric properties about the Curie maximum shows a dispersion in both ε′ and tan δ. This relaxation behavior becomes more pronounced with increasing (Ba,Sr)TiO 3 content, and high Curie maximum temperatures Tmax's are found compared to lead based perovskites with complex B-sites.

Original languageEnglish (US)
Pages (from-to)5181-5184
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
Volume42
Issue number8
StatePublished - Aug 2003

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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