Controllable τf value of barium silicate microwave dielectric ceramics with different Ba/Si ratios
| Autor: | Xue-Kai Lan, Xiao-Chuan Wang, Aurang Zeb, Ze-Hao Chen, Burhan Ullah, Wen Lei, Wen-Zhong Lu, Xiao-Hong Wang, Guifen Fan, Zheng-Yu Zou |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Analytical chemistry Mineralogy chemistry.chemical_element Value (computer science) Barium 02 engineering and technology Crystal structure Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Silicate chemistry.chemical_compound chemistry Phase (matter) 0103 physical sciences Materials Chemistry Ceramics and Composites Electroceramics 0210 nano-technology Microwave |
| Zdroj: | Journal of the American Ceramic Society. 101:25-30 |
| ISSN: | 0002-7820 |
| DOI: | 10.1111/jace.15205 |
| Popis: | Ba1+1/M[Si2O5+1/M] low-permittivity microwave dielectric ceramics are prepared using the conventional solid-state method. Pure phases are obtained in barium silicates with M=1, 3, 4, 5, and ∞, except for M=7, in which two phases, Ba5Si8O21 and BaSi2O5, are observed. As the complexity of the crystal structure described by the Shannon information per reduced unit cell increases, the τf value tends to change from a negative to a positive value, except for M=5, which has the highest complexity. A single Ba5Si8O21 phase with er anomaly peak at −180 °C exhibits a rare positive τf value (+25 ppm/°C), which is a novel temperature compensator. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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