Processing and electromechanical properties of high-coercive field ZnO-doped PIN-PZN-PT ceramics |
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| Authors: | Michael J Brova Beecher H Watson III Rebecca L Walton Elizabeth R Kupp Mark A Fanton Richard J Meyer Jr Gary L Messing |
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| Affiliation: | 1. Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA, USA;2. Applied Research Laboratory, The Pennsylvania State University, State College, PA, USA |
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| Abstract: | This study explores sintering and piezoelectricity of ZnO-doped perovskite Pb(In1/2Nb1/2)O3-Pb(Zn1/3Nb2/3)O3-PbTiO3 (PIN-PZN-PT) ceramics. The enhanced densification of ZnO-doped PIN-PZN-PT is attributed to the formation of oxygen vacancies by the incorporation of Zn2+ into the perovskite B-site and increased rate of bulk diffusion relative to undoped PIN-PZN-PT. Incorporation of Zn2+ into the perovskite lattice increased the tetragonal character of PIN-PZN-PT as demonstrated by tetragonal peak splitting and increased Curie temperature. Sintering in flowing oxygen reduced the solubility of Zn2+ in the perovskite lattice and resulted in rhombohedral PIN-PZN-PT. Sintering in oxygen prevented secondary phase formation which resulted in a high-piezoelectric coefficient (d33 – 550 pC/N), high-coercive field (Ec – 13 kV/cm), and high-rhombohedral to tetragonal phase transition temperature (Tr-t – 165°C). We conclude that ZnO-doped PIN-PZN-PT ceramics are excellent candidates for high-power transducer applications. |
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| Keywords: | doping piezoelectric materials properties sintering |
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