Characterization of the High‐Temperature Ferroelectric (100−x−y)BiScO3–(x)Bi(Zr0.5Zn0.5)O3–(y)PbTiO3 Perovskite Ternary Solid Solution |
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| Authors: | Ben A Kowalski Alp Sehirlioglu Fred W Dynys Ali Sayir |
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| Affiliation: | 1. Case Western Reserve University, Material Science and Engineering Department, , Cleveland, Ohio, 44106;2. NASA Glenn Research Center, , Cleveland, Ohio, 44135 |
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| Abstract: | Ternary compositions based on Bi(B′B″)O3–PbTiO3‐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 BiScO3–PbTiO3 (BS–PT). Ternary compositions in (100?x?y)BiScO3–(x)Bi(Zr0.5Zn0.5)O3–(y)PbTiO3 (100?x?y)BS–xBZZ–yPT] have been investigated with x ≤ 7.5. For compositions with x > 10, the Curie temperature (TC) 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 TC. The electromechanical properties were temperature stable up to the depoling temperature. The most promising composition exhibited a TC of 430°C, piezoelectric coefficient (d33) of 520 pC/N, and a planar coupling factor (kp) of 0.45 that remained unchanged up to depoling temperature at 385°C. |
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