High performance Aurivillius type Na0.5Bi4.5Ti4O15 piezoelectric ceramics with neodymium and cerium modification
| Autor: | Xiao-Long Fu, Tu Na, Chao Chen, Hong Shao, Ming-Zhu Xu, Xiao-Hong Li, Xiang-Ping Jiang, Yunjing Chen |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
biology Ferroelectric ceramics Analytical chemistry Mineralogy chemistry.chemical_element biology.organism_classification Microstructure Neodymium Piezoelectricity Electronic Optical and Magnetic Materials Aurivillius Cerium chemistry visual_art Ceramics and Composites visual_art.visual_art_medium Curie temperature Ceramic |
| Zdroj: | Journal of Advanced Ceramics. 4:54-60 |
| ISSN: | 2227-8508 2226-4108 |
| DOI: | 10.1007/s40145-015-0131-7 |
| Popis: | Bismuth layer-structured ferroelectric ceramics of Na0.5Bi4.5−x (Nd0.5Ce0.5) x Ti4O15 (NBT-x, 0.0 ⩽ x ⩽ 0.4) were synthesized by a traditional solid-state reaction. The effect of (Nd,Ce) substitution for A-site on the microstructure and electrical properties of Na0.5Bi4.5Ti4O15 (NBT)-based piezoelectric ceramics was investigated. X-ray diffraction (XRD) analysis revealed that the (Nd,Ce)-modified NBT ceramics have a pure four-layer Aurivillius type structure. The piezoelectric properties of NBT ceramics were significantly improved by the modification of neodymium and cerium. The Curie temperature T C gradually decreased from 638 °C to 618 °C with increasing the (Nd,Ce) modification. The piezoelectric constant d 33, mechanical quality factor Q m, dielectric loss tanδ and Curie temperature T C of the Na0.5Bi4.3(Nd0.5Ce0.5)0.2Ti4O15 ceramic were found to be 28 pC/N, 3239, 0.0032 and 630 °C, respectively. Thermal annealing studies indicated that the (Nd,Ce)-modified NBT ceramics possess stable piezoelectric properties, demonstrating that the Na0.5Bi4.3(Nd0.5Ce0.5)0.2Ti4O15 ceramic is a promising candidate for high temperature applications. |
| Databáze: | OpenAIRE |
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