Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10155389 | Ceramics International | 2018 | 30 Pages |
Abstract
Novel low-temperature fired Li3Mg2Nb1-xVxO6 (xâ¯=â¯0.02â¯â0.08) microwave dielectric ceramics were synthetized by the partial substitution of V5+ ions on the Nb5+ sites. The effects of V5+ substitution on structure and microwave dielectric properties were investigated in detail. XRD patterns and Rietveld refinement demonstrated that all of the samples exhibited a single orthorhombic structure. The structural characteristics such as the polarizability, packing fraction and NbO6 octahedron distortion were determined to establish the correlations between the structure and the microwave dielectric characteristics. The Ér values presented a tendency similar to that of the polarizability. The high QÃf values were mainly attributed to the effects of the grain sizes and density rather than the packing fraction. The variation in the Ïf values was attributed to NbO6 octahedron distortion. Notably, the Li3Mg2Nb1-xVxO6 (xâ¯=â¯0.02) ceramics sintered at 900â¯Â°C had outstanding microwave dielectric properties: εr=â¯16, QÃf=â¯131,000â¯GHz (9.63â¯GHz), and Ïf=â¯ââ¯26â¯ppm/°C, making these ceramics promising ultralow loss candidates for low temperature co-fired ceramics (LTCC) applications.
Related Topics
Physical Sciences and Engineering
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Authors
Gang Wang, Huaiwu Zhang, Xin Huang, Fang Xu, Gongwen Gan, Yan Yang, Dandan Wen, Jie Li, Cheng Liu, Lichuan Jin,