Low-temperature sintering and microwave dielectric properties of LiF-doped Ba(Mg1/2W1/2)O3–TiO2 ceramics
| Autor: | Peng Liu, Zhifen Fu, Baochun Guo, Xue-Jiao Bai |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Doping Metals and Alloys Analytical chemistry Sintering 02 engineering and technology Dielectric Crystal structure 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Mechanics of Materials visual_art 0103 physical sciences Materials Chemistry visual_art.visual_art_medium Ceramic Composite material 0210 nano-technology Temperature coefficient Perovskite (structure) |
| Zdroj: | Journal of Alloys and Compounds. 667:146-150 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.01.147 |
| Popis: | The Ba(Mg 1/2 W 1/2 )O 3 (BMW)– x wt% LiF ( x = 2.0, 4.0, 6.0, 8.0) ceramics were prepared by a conventional solid-state route. The effects of LiF addition on the sinterability, crystal structure, microstructures and microwave dielectric properties of BMW ceramics were investigated. With an amount of LiF addition, the sintering temperature of the ceramics was reduced to below 960 °C from 1550 °C without degradation of microwave dielectric properties, due to the enhancement of the apparent density at low temperature by liquid phase sintering. On this basis, TiO 2 was used to adjust the temperature coefficient of resonant frequency, optimized microwave dielectric properties with e r = 20, Q × f = 48,000 GHz, and τ f = 1.2 ppm/°C for 0.96 BMW–0.04 TiO 2 –4.0 wt% LiF composition. With low sintering temperature and good dielectric properties, these LiF-doped ceramics are promising materials for LTCC integration applications. |
| Databáze: | OpenAIRE |
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