Articles
  • Cobalt-modified Mg₀.₉₅Zn₀.₀₅TiO₃ ceramics with improved dielectric properties for microwave applications

  • Ruei-Sung Yua, Cheng-Che Hob, Chun-Hong Chenc, Yao-Chin Wangd, Che-Hao Liaob, Po-Cheng Chenb and Shih-Hung Linb,*

  • aDepartment of Chemical and Materials Engineering, National Chin-Yi University of Technology, No.57, Sec. 2, Zhongshan Rd., Taiping Dist., Taichung 411030, Taiwan
    bDepartment of Electronic Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan
    cDepartment of Electrical Engineering, National Chung Cheng University, Chiayi, Taiwan
    dDepartment of Electronic Engineering, Cheng Shiu University, Kaohsiung, Taiwan

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In pursuit of high-performance and energy-efficient dielectric ceramics for next-generation wireless communication systems, this work examines the effect of Co2+ substitution for Mg2+ on the microstructure and microwave dielectric properties of (Mg0.95Zn0.05)TiO3 ceramics. A series of [(Mg1–xCox)0.95Zn0.05]TiO3 compositions (x = 0.1–0.4) was synthesized via solid-state reaction and characterized by synchrotron XRD, Raman spectroscopy, SEM, and dielectric measurements. The optimal composition, [(Mg0.8Co0.2)0.95Zn0.05]TiO3, sintered at 1350 °C for 2 h, achieved εr = 18.42, Qf = 190,000 GHz, and τf = −51 ppm/°C, representing a 16.2% Qf enhancement and a 43.7% reduction in overall thermal budget compared with literature benchmarks. These results are attributed to improved densification, increased lattice polarizability, and a stable phase composition. The findings demonstrate a viable route toward low-loss, energy-efficient microwave ceramics suitable for 5G and future communication devices.


Keywords: Crystallization, Dielectric performance, Microwave ceramics, Energy-efficient processing, 5G applications.

This Article

  • 2026; 27(1): 37-47

    Published on Feb 28, 2026

  • 10.36410/jcpr.2026.27.1.37
  • Received on Aug 13, 2025
  • Revised on Nov 1, 2025
  • Accepted on Nov 6, 2025

Correspondence to

  • Shih-Hung Lin

  • Department of Electronic Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan
    Tel : +886-5-5342601 (ext. 4344) Fax: +886-5-5312063

  • E-mail: isshokenmei@yuntech.edu.tw
  • ORCID:
    https://orcid.org/0000-0001-5982-6905