Low-temperature firing and microwave dielectric properties of ZnO-Nb2O5-TiO2-SnO2 ceramics with CuO-V2O5 |
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| Authors: | Qi-Long Zhang Hui Yang |
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| Affiliation: | Department of Materials and Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The effects of CuO-V2O5 addition on the sintering temperature and microwave dielectric properties of ZnO-Nb2O5-TiO2-SnO2 were investigated. The CuO-V2O5 addition lowered the sintering temperature of ZnO-Nb2O5-TiO2-SnO2 ceramics effectively from 1150 to 860 °C due to the liquid-phase effect of Cu2V2O7 and Cu3(VO4)2, as observed by XRD. The microwave dielectric properties were found to strongly correlate with the sintering temperature and the amount of CuO-V2O5 addition. The maximum Qf values decreased with increasing CuO-V2O5 content, due to the formation of the second phase, Cu3(VO4)2 and CuNbO3. Zero τf value can be obtained by properly adjusting the sintering temperature. At 860 °C, ZnO-Nb2O5-TiO2-SnO2 ceramics with 1.5 wt.% CuO-V2O5 gave excellent microwave dielectric properties: ?r = 42.3, Qf = 9000 GHz and τf = 8 ppm/°C. |
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| Keywords: | A Ceramics B Electronic materials C X-ray diffraction D Dielectric properties |
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