Structure and property investigation of a Bi-based perovskite solid solution: (1-x)Bi(Ni 12Ti 12)O 3-xPbTiO 3

Soon Mok Choi, Craig J. Stringer, Thomas R. Shrout, Clive A. Randall

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Abstract

Extending the investigations on Bi-based perovskite solid solutions for high-temperature piezoelectric ceramics, this paper considers the binary solid-solution system (1-x) Bi (Ni12 Ti12) O3 -xPbTi O3 [(1-x) BNT-xPT] for 0.39≤x≤1.00. High-density polycrystalline ceramics were fabricated using conventional solid-state processing methods. These ceramics are then taken for structural and electrical properties and differential scanning calorimetry measurements. A morphotropic phase boundary (MPB) was found at the composition 0.51BNT-0.49PT, with a corresponding paraelectric-ferroelectric phase transition TC ≈400 °C. The electrical poled ceramics demonstrated piezoelectric d33 coefficients≈260 pCN at room temperature for the MPB BNT-PT compositions. Experimental data are also given for the influence of Mn O2 doping to the BNT-PT system close to the MPB compositions, noting an improvement in dielectric losses but a reduction in d33 ≈180 pCN. Tricritical behavior is also identified in the tetragonal phase field, with a TC enhancement above TC ∼495 °C found similar to other Bi (Me′ Me″) O3 -PbTi O3 systems with high MPB transitions.

Original languageEnglish (US)
Article number034108
JournalJournal of Applied Physics
Volume98
Issue number3
DOIs
StatePublished - Aug 1 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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