期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 102, 期 5, 页码 2278-2282出版社
WILEY
DOI: 10.1111/jace.16290
关键词
fergusonite; microwave dielectric ceramics; NdNbO4
资金
- Key Basic Research Program of Shaanxi Province [2017GY-129]
- Fundamental Research Funds for the Central University
- National Key Research and Development Program of China [2017YFB0406301]
In the present work, Bi3+ was used to substitute for Nd3+ in the NdNbO4 ceramic and pure fergusonite solid solution was formed within 20 mol. % substitutions. Microwave dielectric permittivity of the (Nd1-xBix)NbO4 (x <= 0.2) ceramics increased linearly with x value due to the larger ionic polarizability of Bi3+ than Nd3+. Excellent microwave dielectric properties with a permittivity (epsilon(r)) similar to 22.5, a Qf (Q = quality factor, f = resonant frequency) similar to 50 000 GHz, and a TCF similar to-9 ppm/degrees C were obtained in the (Nd0.9Bi0.1)NbO4 ceramic. This method might work in other fergusonite-type rare-earth ortho-niobates.
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