Microwave dielectric properties of ZnO–Nb2O5–xTiO2 ceramics prepared by reaction-sintering process
| Autor: | Zhi-fen Fu, Peng Liu, Pan Ruan, Baochun Guo, Feng Li |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Microwave dielectric properties Analytical chemistry Sintering 02 engineering and technology Dielectric Crystal structure 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials visual_art Phase (matter) 0103 physical sciences visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Single phase 0210 nano-technology Temperature coefficient |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 27:4201-4205 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-016-4283-1 |
| Popis: | The ZnO–Nb2O5–xTiO2 (1 ≤ x ≤ 2) ceramics were fabricated by reaction-sintering process, and the effects of TiO2 content and sintering temperature on the crystal structure and microwave dielectric properties of the ceramics were investigated. The XRD patterns of the ceramics showed that ZnTiNb2O8 single phase was formed as x ≤ 1.6 and second phase Zn0.17Nb0.33Ti0.5O2 appeared at x ≥ 1.8. With the increase of TiO2 content and sintering temperature, the amount of the second phase Zn0.17Nb0.33Ti0.5O2 increased, resulting in the increase of dielectric constant, decrease of Q × f value, and the temperature coefficient of resonant frequency (τf) shifted to a positive value. The optimum microwave dielectric properties were obtained for ZnO–Nb2O5–2TiO2 ceramics sintered at 1075 °C for 5 h: er = 45.3, Q × f = 23,500 GHz, τf = +4.5 ppm/°C. |
| Databáze: | OpenAIRE |
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