Piezoelectric and dielectric properties of Ce substituted La2Ti2O7 ceramics |
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| Authors: | ZP Gao HX Yan HP Ning R Wilson XY Wei B Shi H Ye MJ Reece |
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| Affiliation: | 1. School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK;2. Nanoforce Technology Ltd., London E1 4NS, UK;3. Xi’an JiaoTong University, Xi’an 710049, China;4. School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UK |
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| Abstract: | The ferroelectric and dielectric properties of cerium (Ce) substituted La2Ti2O7 (LTO) have been investigated. Single phase, dense La2?xCexTi2O7 (x = 0.15, 0.25, 0.35) ceramics were prepared by spark plasma sintering. The solubility limit of Ce in La2?xCexTi2O7 was found to be between 0.35 and 0.5. The a-, b- and c-axes of the unit cell decrease with increasing Ce substitution. The Curie point (Tc) of La2?xCexTi2O7 (x = 0, 0.15, 0.25, 0.35) decreases and dielectric constant and loss increase with increasing Ce substitution. Cerium can increase the d33 of La2Ti2O7. The highest d33 was 3.9 ± 0.1 pC/N for La1.85Ce0.15Ti2O7 textured ceramic. |
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