Formation and Microwave Dielectric Properties of the Mg2V2O7 Ceramics |
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| Authors: | Mi-Ri Joung Jin-Seong Kim Myung-Eun Song Sahn Nahm Jong-Hoo Paik Byung-Hyun Choi |
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| Affiliation: | Department of Materials Science and Engineering, Korea University, Seoul 136-701, South Korea;
Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, South Korea |
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| Abstract: | The formation process and microwave dielectric properties of the Mg2V2O7 ceramics were investigated. The MgV2O6 phase that was formed at around 450°C interacted with remnant MgO above 590°C to form a homogeneous monoclinic Mg2V2O7 phase. Finally, this monoclinic Mg2V2O7 phase was changed to a triclinic Mg2V2O7 phase for the specimen fired at 800°C. Sintering at 950°C for more than 5 h produced high-density triclinic Mg2V2O7 ceramics. In particular, the Mg2V2O7 ceramics sintered at 950°C for 10 h exhibited the good microwave dielectric properties of ?r=10.5, Q × f =58 275 GHz, and τf=?26.9 ppm/°C. |
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