High Q×f values of Zn-Ni co-modified LiMg0.9Zn0.1-x Ni x PO4 microwave dielectric ceramics for 5G/6G LTCC modules

Li, Shuai; Li, Chen; Mao, Minmin; Song, Kaixin; Iqbal, Yaseen; Khesro, Amir; Faouri, Sinan S.; Lu, Zhilun; Liu, Bing; Sun, Shikuan; Wang, Dawei

Abstract

In this work, Zn-Ni co-modified LiMg0.9Zn0.1-xNixPO4 (x = 0–0.1) microwave dielectric ceramics were fabricated using a solid state synthesis route. Rietveld refinement of the XRD data revealed that all ceramic samples have formed a single phase with olivine structure. SEM images showed that the samples have a dense microstructure, that agrees with the measured relative density of 97.73 %. Based on the complex chemical bond theory, Raman and infrared reflectance spectra, we postulate that εr is mainly affected by the ionic polarizability, lattice and bond energy, while P-O bond plays a decisive role in Q×f and τf value. Optimum properties of Q×f ~ 153,500 GHz, εr ~ 7.13 and τf ~ −59 ppm/°C were achieved for the composition LiMg0.9Zn0.06Ni0.04PO4 sintered at 875 ℃ for 2 h. This set of properties makes these ceramics an excellent candidate for LTCC, wave-guide filters and antennas for 5 G/6 G communication applications.

Citation

Li, S., Li, C., Mao, M., Song, K., Iqbal, Y., Khesro, A., Faouri, S. S., Lu, Z., Liu, B., Sun, S., & Wang, D. (2022). High Q×f values of Zn-Ni co-modified LiMg0.9Zn0.1-x Ni x PO4 microwave dielectric ceramics for 5G/6G LTCC modules. Journal of the European Ceramic Society, 42(13), 5684-5690. https://doi.org/10.1016/j.jeurceramsoc.2022.06.083

• Journal Article Type: Article
• Acceptance Date: Jun 30, 2022
• Online Publication Date: Jul 3, 2022
• Publication Date: 2022-10
• Deposit Date: Jul 11, 2022
• Publicly Available Date: Jul 4, 2023
• Journal: Journal of the European Ceramic Society
• Print ISSN: 0955-2219
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 42
• Issue: 13
• Pages: 5684-5690
• DOI: https://doi.org/10.1016/j.jeurceramsoc.2022.06.083
• Keywords: LiMgPO4, Microwave dielectric ceramic, 5G/6G communication
• Public URL: http://researchrepository.napier.ac.uk/Output/2885775