Structural and Electrical Properties of Er2O3-Doped Na1/2Bi1/2TiO3 Lead-Free Piezoceramics |
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| Authors: | Mengjia Wu Yiqing Lu Yongxiang Li |
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| Affiliation: | The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Sodium bismuth titanates Na1/2Bi1/2TiO3 (NBT) doped with 0–3 wt% Er2O3 were prepared by the conventional solid-state reaction method. The X-ray diffraction results revealed that the sintered Er-doped NBT ceramics exhibited a pure perovskite structure with Er3+ concentrations ranging from 0 to 1 wt%. At a low Er2O3 concentration, the Er-doped NBT ceramics showed enhanced electrical properties with dielectric constant ?33T/?0=636, a low dielectric dissipation factor (tan δ=3.3%), a low coercive field ( E c=4.56 kV/mm), and a high piezoelectric constant ( d 33=75 pC/N). The relationship between the composition and properties of Er-doped NBT ceramics has been discussed. |
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