Characterization of the High‐Temperature Ferroelectric (100−x−y)BiScO3–(x)Bi(Zr0.5Zn0.5)O3–(y)PbTiO3 Perovskite Ternary Solid Solution. Issue 2 (5th December 2013)

• Record Type: Journal Article
• Authors: Kowalski, Ben A.; Sehirlioglu, Alp; Dynys, Fred W.; Sayir, Ali; Davies, P. K.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 2(2014)
• Page Start: 490
• Page End: 497
• Publication Date: 2013-12-05
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12648
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace12648-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Ternary compositions based on Bi(B′B″)O<sub>3</sub>–PbTiO<sub>3</sub>‐type compounds have been investigated for high‐temperature piezoelectric applications. Compositions in the ternary were chosen to be near the binary morphotropic phase boundary (MPB) composition of BiScO<sub>3</sub>–PbTiO<sub>3</sub> (BS–PT). Ternary compositions in (100−<italic>x</italic>−<italic>y</italic>)BiScO<sub>3</sub>–(<italic>x</italic>)Bi(Zr<sub>0.5</sub>Zn<sub>0.5</sub>)O<sub>3</sub>–(<italic>y</italic>)PbTiO<sub>3</sub> [(100−<italic>x</italic>−<italic>y</italic>)BS–<italic>x</italic>BZZ–<italic>y</italic>PT] have been investigated with <italic>x</italic> ≤ 7.5. For compositions with <italic>x</italic> > 10, the Curie temperature (<italic>T</italic><sub>C</sub>) decreased below 400°C. Dielectric, piezoelectric, and electromechanical properties were characterized as a function of temperature, frequency, and electric field. Small additions of BZZ were shown to increase the electromechanical properties with only a small loss in <italic>T</italic><sub>C</sub>. The electromechanical properties were temperature stable up to the depoling temperature. The most promising composition exhibited a <italic>T</italic><sub>C</sub> of 430°C, piezoelectric coefficient (<italic>d</italic><sub>33</sub>) of 520 pC/N, and a planar coupling factor (<italic>k</italic><sub>p</sub>) of 0.45 that remained unchanged up to depoling temperature at 385°C.</p> </abstract>