High-Qf value and temperature stable Zn2+-Mn4+ cooperated modified cordierite-based microwave and millimeter-wave dielectric ceramics
Xiu, Zhiyu; Mao, Minmin; Lu, Zhilun; Huang, Zhichao; Qi, Zeming; Bafrooei, Hadi Barzegar; Zhou, Tao; Wang, Dawei; Lin, Huixing; Taheri-nassaj, Ehsan; Song, Kaixin
Dr Zhilun Lu Z.Lu@napier.ac.uk
Hadi Barzegar Bafrooei
Cordierite-based dielectric ceramics with a lower dielectric constant would have significant application potential as dielectric resonator and filter materials for future ultra-low-latency 5G/6G millimeter-wave and terahertz communication. In this article, the phase structure, microstructure and microwave dielectric properties of Mg2Al4–2x(Mn0.5Zn0.5)2xSi5O18 (0 ≤ x ≤ 0.3) ceramics are studied by crystal structure refinement, scanning electron microscope (SEM), the theory of complex chemical bonds and infrared reflectance spectrum. Meanwhile, complex double-ions coordinated substitution and two-phase complex methods were used to improve its Q×f value and adjust its temperature coefficient. The Q×f values of Mg2Al4–2x(Mn0.5Zn0.5)2xSi5O18 single-phase ceramics are increased from 45,000 GHz@14.7 GHz (x = 0) to 150,500 GHz@14.5 GHz (x = 0.15) by replacing Al3+ with Zn2+-Mn4+. The positive frequency temperature coefficient additive TiO2 is used to prepare the temperature stable Mg2Al3.7(Mn0.5Zn0.5)0.3Si5O18-ywt%TiO2 composite ceramic. The composite ceramic of Mg2Al3.7(Mn0.5Zn0.5)0.3Si5O18-ywt%TiO2 (8.7 wt% ≤ y ≤ 10.6 wt%) presents the near-zero frequency temperature coefficient at 1225 °C sintering temperature: εr = 5.68, Q×f = 58,040 GHz, τf = −3.1 ppm/°C (y = 8.7 wt%) and εr = 5.82, Q×f = 47,020 GHz, τf = +2.4 ppm/°C (y = 10.6 wt%). These findings demonstrate promising application prospects for 5 G and future microwave and millimeter-wave wireless communication technologies.
Xiu, Z., Mao, M., Lu, Z., Huang, Z., Qi, Z., Bafrooei, H. B., …Song, K. (2022). High-Qf value and temperature stable Zn2+-Mn4+ cooperated modified cordierite-based microwave and millimeter-wave dielectric ceramics. Journal of the European Ceramic Society, 42(13), 5712-5717. https://doi.org/10.1016/j.jeurceramsoc.2022.05.082
|Journal Article Type||Article|
|Acceptance Date||May 31, 2022|
|Online Publication Date||Jun 3, 2022|
|Deposit Date||Jun 7, 2022|
|Publicly Available Date||Jun 4, 2023|
|Journal||Journal of the European Ceramic Society|
|Peer Reviewed||Peer Reviewed|
|Keywords||Cordierite, Microwave and millimeter-wave dielectric ceramics, 5G/6G communication, Infrared reflectance spectrum|
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