Structural and electrical properties of Bi1/2Na1/2TiO3–BaTiO3–Sr3CuNb2O9 lead-free piezoelectric ceramics
| Autor: | Jing Zhang, Gui-Gui Peng, De-Yi Zheng, Hao Zhang, Cheng Cheng, Shun-Min Hu, Liang-liang Li |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Analytical chemistry 02 engineering and technology Dielectric Coercivity 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Ferroelectricity Piezoelectricity Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols.namesake Nuclear magnetic resonance visual_art 0103 physical sciences symbols visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering 0210 nano-technology Raman spectroscopy Solid solution |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 28:67-74 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-016-5493-2 |
| Popis: | The structure, microstructure, field-induced strain, ferroelectric, piezoelectric and dielectric properties of (1 − x) (Bi0.5Na0.5)0.935Ba0.065TiO3–xSr3CuNb2O9 (BNT-BT6.5–xSCN, with x = 0, 0.003, 0.006, 0.009) ceramics were investigated. X-ray diffraction patterns show that all samples are pure perovskite structure and Sr3CuNb2O9 (SCN) effectively diffused into the 0.935Bi0.5Na0.5TiO3–0.065BaTiO3 (BNT–BT6.5) solid solution which also reflected in the Raman spectra and the energy disperse spectroscopy (EDS) analysis. With the increases of SCN content, the coercive field (E c = 18.41 kV/cm) decreases greatly, whereas the remnant polarization (P r = 29.11 μC/cm2) increases a little at x = 0.003 which is showed in the polarization hysteresis (P–E) loops, the result indicate that the ferroelectric order would be disrupted. Around critical composition (x = 0.003) at a driving field of 60 kV/cm, a large unipolar strain of 0.29 % with a normalized strain (d 33 = 483 pm/V) is obtained at room temperature. The results indicate that BNT-BT6.5-xSCN ceramics with excellent properties are promising to replace lead-based piezoelectric ceramics and can be used in practical applications. |
| Databáze: | OpenAIRE |
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