Articles
  • Microwave dielectric properties of Li3Mg2SbO5F2 oxyfluorides ceramics produced by reaction-sintering method

  • Pengshen Wua, Cuijin Peia, Miao Chena, Xu Gaoa, Weihong Liub, Guoguang Yaoa,* and Jin Liuc

  • aSchool of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
    bSchool of Electronic Energineering, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
    cSchool of Fine Arts, Shaanxi Normal University, Xi’an, 710062, China

  • 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

By a reaction-sintering approach Li3Mg2SbO5F2 oxyfluorides ceramics were prepared. The sinterability, microstructure, phase transition along with microwave dielectric performances of present ceramics were researched. A gradual phase transition from cubic to orthorhombic in Li3Mg2SbO5F2 ceramics sintered above 825 °C was identified by XRD refinement analysis. The microwave dielectric performances of present ceramics were closely correlated with its phase transition process and microstructure. Typically, optimal microwave dielectric performances (εr ~ 8.1, τf ~ –54.0 ppm/°C, Q × f ~ 68,500 GHz (under 9.2 GHz)) were achieved for 825 °C-sintered Li3Mg2SbO5F2 ceramics. Moreover, a cylindrical dielectric resonator antenna fabricated from Li3Mg2SbO5F2 ceramics exhibited a maximum return loss (S11) of –30.3 dB, a maximum gain of 5.3 dB and VSWR of 1.1 at the center frequency of 11.6 GHz, and impedance bandwidth of 300 MHz (at –10 dB), respectively.


Keywords: Ceramics, Li3Mg2SbO5F2 oxyfluorides, microwave dielectric properties, antenna

This Article

  • 2023; 24(6): 977-982

    Published on Dec 31, 2023

  • 10.36410/jcpr.2023.24.6.977
  • Received on Sep 3, 2023
  • Revised on Oct 9, 2023
  • Accepted on Oct 28, 2023

Correspondence to

  • Guoguang Yao

  • School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
    Tel : +86 29 88166089 Fax: +86 29 88166333

  • E-mail: yaoguoguang@xupt.edu.cn