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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


Shuai Li

Chen Li

Minmin Mao

Kaixin Song

Yaseen Iqbal

Amir Khesro

Sinan S. Faouri

Zhilun Lu

Bing Liu

Shikuan Sun

Dawei Wang


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.

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
Keywords LiMgPO4, Microwave dielectric ceramic, 5G/6G communication
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