Influences of Sintering Temperature on Piezoelectric, Dielectric and Ferroelectric Properties of Li/Ta-Codoped Lead-Free (Na,K)NbO3 Ceramics |
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| Authors: | Pei Zhao Bo-Ping Zhang Jing-Feng Li |
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| Affiliation: | School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Li/Ta-codoped lead-free (Na,K)NbO3 ceramics with a nominal composition of (Na0.535K0.480)0.942Li0.058](Nb0.90Ta0.10)O3 were synthesized normally at 1070°–1100°C. The XRD patterns of all samples show a single pervoskite structure with tetragonal symmetry. Although MPB separating the orthorhombic and tetragonal symmetries was absent, the maximum piezoelectric coefficient ( d 33), electromechanical coupling coefficient ( k p), Curie temperature ( T c), and remanent polarization ( P r) were optimized as 216 pC/N, 38.1%, 445°C, and 8.73 μC/cm2, respectively. |
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