Investigation on microwave dielectric properties of new low-loss CoZrTa2O8 ceramics
| Autor: | Tian-Liang Tang, Wang-Suo Xia, Shaobo Zhang, Liwei Shi, Ying Wang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Sintering 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Grain size Grain growth Mechanics of Materials 0103 physical sciences Relative density General Materials Science Dielectric loss Composite material 0210 nano-technology Porosity Temperature coefficient |
| Zdroj: | Materials Letters. 231:1-4 |
| ISSN: | 0167-577X |
| Popis: | New ceramics with CoZrTa2O8 formula were prepared by conventional solid-state reaction method. The phase composition of all sintered samples was confirmed as a single phase with monoclinic wolframite structure belonged to the P2/c space group. The grain growth was analyzed through the investigation of relative density and grain size. The dielectric constant (er) was discussed with relative density, polarizability and porosity. The quality factors (Q × f) were analyzed by considering grain growth and atomic packing fraction. The temperature coefficient of resonant frequency (τƒ) had no significant change under different sintering temperature. The typical microwave dielectric properties of CoZrTa2O8 ceramics were er = 23.54, Q × f = 20,100 GHz, and τƒ = −8.72 ppm/°C, sintered at 1250 °C for 4 h. Considering the low dielectric loss and near-zero τƒ value, CoZrTa2O8 ceramics should be good candidates for microwave device application. |
| Databáze: | OpenAIRE |
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