Microstructure and bidirectional dielectric tunability behaviour of Nd3+-doped KSr2Nb5O15 lead-free ceramics
| Autor: | Qian Chen, Jie Xu, Zhida Ma, Junting Liu, Feng Gao, Li Jin, Shuyao Cao, Jia Zhao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Nd3+ doping
Materials science Bidirectional dielectric tunability 02 engineering and technology Dielectric 010402 general chemistry 01 natural sciences Tungsten bronze type structure Electric field Ceramic Materials of engineering and construction. Mechanics of materials business.industry Doping KSr2Nb5O15 Metals and Alloys 021001 nanoscience & nanotechnology Microstructure Piezoelectricity Ferroelectricity 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials visual_art visual_art.visual_art_medium TA401-492 Optoelectronics 0210 nano-technology Luminescence business |
| Zdroj: | Journal of Materiomics, Vol 7, Iss 5, Pp 976-987 (2021) |
| ISSN: | 2352-8478 |
| Popis: | The luminescence modulation behaviour under the in-situ electric field of rare-earth doped KSr2Nb5O15 ceramics opened a new door for the development of dielectric materials. Where the understanding the effect of rare-earth doping on the electric properties of host, especially at the similar doping concentration with luminescence researches (low concentrations) is very important for the exploration of mechanism of electric-luminescent coupling effect. In this work, Nd3+-doped KSr2Nb5O15 (KSN-xNd) ceramics were synthesized, and the electric properties were investigated systematically. Our results suggest that the Nd3+ doping slightly increased the phase transition temperatures and improved the piezoelectric response of KSr2Nb5O15. Most importantly, a bidirectional dielectric tunability is revealed in KSr2Nb5O15. The dielectric permittivity can be adjusted by the DC electric bias, with tunability ranging from −12.3% to 21.9%. The related mechanism and relationship between the bidirectional dielectric tunability and ferroelectricity are revealed by temperature-dependent dielectric and ferroelectric characterization. The researches of electric properties and bidirectional dielectric tunability of KSN-based ceramics paved the way to further exploration of electric-luminescent coupling mechanism. |
| Databáze: | OpenAIRE |
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