Abstract
The influences of Zr4+ substituted for Ti4+ on the microwave dielectric properties of LiNb0.6Ti(0.5−x)ZrxO3 (0.00 ≤ x ≤ 0.14) ceramics prepared via conventional solid-state method have been studied and are discussed. X-ray diffraction analysis indicated that the Li1.075Nb0.625Ti0.45O3 phase was formed, while a small trace of ZrO2 was observed when x reaches 0.08. With the increase of Zr4+ substitution, variation of the dielectric constant (εr) was dominated by phase constitutions and densification. The quality factor (Q × f) showed a continuously decrease tendency, which was attributed to the increasing number of grain boundaries and the content of the secondary phase. The temperature coefficient of the resonant frequency (τf) value shifted from 30.60 ppm/°C to − 14.50 ppm/°C. Temperature-stable microwave dielectric ceramics was obtained with εr = 63.14, Q × f = 4626 GHz and τf =1.38 ppm/°C, at x = 0.10.
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The authors appreciate the financial support from the National Natural Science Foundation of China (No. 51872037).
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Li, E., Yang, X., Yang, H. et al. Improved Microwave Dielectric Properties of LiNb0.6Ti0.5O3 Ceramics with Zr Substitutions. J. Electron. Mater. 48, 5080–5087 (2019). https://doi.org/10.1007/s11664-019-07314-3
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DOI: https://doi.org/10.1007/s11664-019-07314-3