Fabrication and properties of PYN-PMN-PZT quaternary piezoelectric ceramics for high-power, high-temperature applications |
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Authors: | Haiyan Chen Chunhua Fan |
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Affiliation: | Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai, 201306, China |
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Abstract: | xPb(Yb1/2Nb1/2)O3 - 0.05Pb(Mn1/3Nb2/3)O3 - (0.95 - x)Pb(Zr0.48Ti0.52)O3 (PYN-PMN-PZT) quaternary piezoelectric ceramics were prepared by a traditional ceramics process. The effects of Pb(Yb1/2Nb1/2)O3 (PYN) content on the phase structure, electrical properties and Curie temperature of the quaternary system were investigated in detail. The phase structure of PYN-PMN-PZT ceramics changed from tetragonal to rhombohedral with increasing PYN content. The piezoelectric coefficient (d33), the electromechanical coupling factor (Kp) and the dielectric constant (ε33T/ε0) reach maximum values near the morphotropic phase boundary (MPB), whereas the mechanical quality factor (Qm) decreases. The sintered PYN-PMN-PZT ceramics exhibit high TC, and as the PYN content increases, TC decreases slightly. The MPB of the tetragonal and rhombohedral phase coexist and are located at a PYN composition of 0.12 ≤ x ≤ 0.14.The composition of PYN-PMN-PZT around the MPB showed high d33 (> 300pC/N), Kp (> 0.50), Qm (> 1000) and TC (> 350 °C), meaning it is a very promising piezoelectric material for high-power and high-temperature applications. |
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Keywords: | PYN-PMN-PZT Piezoelectric materials High power High Curie temperature Electrical properties |
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