Synthesis and microwave dielectric properties of CaMg2Si3O9 ceramics
| Autor: | Zuowei Dong, Zheng Ke, Yan Gao, Yong Zheng, Xuepeng Lu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Sintering Dielectric Condensed Matter Physics Microstructure Atomic and Molecular Physics and Optics Grain size Electronic Optical and Magnetic Materials symbols.namesake visual_art Particle-size distribution symbols visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Composite material Raman spectroscopy Monoclinic crystal system |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 31:21583-21590 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-020-04671-2 |
| Popis: | CaMg2Si3O9 ceramics with low dielectric constant were obtained using the traditional solid-state reaction. Phase analysis, Raman spectroscopy, microstructure, and microwave dielectric properties of the CaMg2Si3O9 at different sintering temperatures were investigated. Only a single phase CaMg2Si3O9, which had the same monoclinic crystal structure as CaMgSi2O6 with a space group of C2/c, was formed in the sintered bodies and no second phases existed in ceramics when sintered at different temperatures. With sintering temperatures from 1200 to 1300 °C, the average grain size of ceramics continuously increased, and the grain size distribution became uniform. The density, Q × f, and the er values of CaMg2Si3O9 ceramics initially increased and subsequently decreased as the sintering temperature increased. When the sintering was conducted at 1250 °C for 4 h, the CaMg2Si3O9 ceramics showed a maximum bulk density of 3.45 g/cm3 and enhanced microwave dielectric properties of er = 7.61, Q × f = 41,998 GHz, and τf = − 49.8 ppm/°C. |
| Databáze: | OpenAIRE |
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