Excellent stability and low dielectric loss of Ba(Fe 0.5 Nb 0.5 )O 3 synthesized by a solution precipitation method
| Autor: | Chun Wang, Yong Fei Wen, Ming Rui Fang, Yong Ping Pu, Hai Juan Li, Zhuo Wang |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Precipitation (chemistry) Mechanical Engineering Metals and Alloys Analytical chemistry Sintering 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Grain size Chemical engineering Mechanics of Materials visual_art 0103 physical sciences Materials Chemistry visual_art.visual_art_medium Grain boundary Dielectric loss Ceramic 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 656:431-438 |
| ISSN: | 0925-8388 |
| Popis: | A solution precipitation method was applied to prepare Ba(Fe0.5Nb0.5)O3 powders. Nano-size BFN powders with uniform particles size (∼40 nm) were synthesized by solution precipitation method, which is beneficial to calcine at low temperature (1223 K). The sintering sample with dense microstructure and uniform grain size (15 μm) was obtained at 1673 K, which exhibits enhanced dielectric properties. The dielectric loss of BFN ceramic could be significantly reduced by solution precipitation method. The frequency and temperature stability of BFN ceramics could also be improved. The complex impedance spectroscopy analysis results suggested that the obtained Ba(Fe0.5Nb0.5)O3 ceramics, consisting of semiconducting grains and insulating grain boundaries, were electrically heterogeneous. The grain boundary effect was responsible for such a high value of dielectric constant. |
| Databáze: | OpenAIRE |
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