Abstract
A BiCu2PO6 microwave dielectric ceramic was prepared using a solid-state reaction method. As the sintering temperature increased from 800°C to 880°C, the bulk density of BiCu2PO6 ceramic increased from 6.299 g/cm3 to 6.366 g/cm3; the optimal temperature was 860°C. The best microwave dielectric properties [permittivity (ɛ r ) = ∼16, a quality factor (Q × f) = ∼39,110 GHz and a temperature coefficient of resonant frequency (τ f ) = ∼−59 ppm/°C] were obtained in the ceramic sintered at 860°C for 2 h. Then, TiO2 with a positive τ f (∼+400 ppm/°C) was added to compensate the τ f value. The composite material was found to have a near-zero τ f (+2.7 ppm/°C) and desirable microwave properties (ɛ r = 19.9, Q × f = 24,885 GHz) when synthesized at a sintering temperature of 880°C. This system could potentially be used for low-temperature co-fired ceramics technology applications.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (U1632146), the Young Star Project of Science and Technology of Shaanxi Province (2016KJXX-34), the Fundamental Research Funds for the Central University, and the 111 Project of China (B14040). The SEM work was done at International Center for Dielectric Research (ICDR), Xi’an Jiaotong University, Xi’an, China and the authors thank Ms. Yan-Zhu Dai for her help in using SEM.
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Hao, SZ., Zhou, D., Li, WB. et al. Microwave Dielectric Properties of BiCu2PO6 Ceramics with Low Sintering Temperature. J. Electron. Mater. 46, 6241–6245 (2017). https://doi.org/10.1007/s11664-017-5658-7
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DOI: https://doi.org/10.1007/s11664-017-5658-7