Relaxor and strain behavior in BaTi1-x(Li2/3Nb2/3)xO3 ceramics |
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| Authors: | Shi Xiao Sen Deng Jingji Zhang Yilu Zhou Jiamin Tang Yidan Wang Lipeng Wang Hongfang Qi Jiangying Wang |
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| Affiliation: | 1. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China;2. Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Shanghai 200092, PR China |
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| Abstract: | A new lead-free perovskite system of BaTi1?x(Li2/3Nb2/3)xO3 (x = 0.02, 0.05, 0.07 and 0.10) has been synthesized by the mixed-oxide route. Temperature and frequency dependences of permittivity show a crossover from ferroelectric to relaxor behavior. For the samples with x ≥ 0.05, the frequency-dependent Tm satisfying the Vögel–Fulcher formula indicates a relaxor behavior. The increase with orders of magnitude in Ea with respect to x is possibly ascribed to more Ba-vacancies. Remnant polarization and strain decrease with increasing x due to phase transformation from ferroelectric tetragonal to paraelectric pseudocubic at room temperature. |
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