Articles
  • Effect of LiF addition on the sinterability, crystal structure and microwave dielectric properties of Li3Mg4NbO8 ceramics

  • Wei Jin, Jingjing Tan, Jiaxin Yan, Yao Tao, Ningning Yao, Xiaomeng Ruan and Cuijin Pei*

  • School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, 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

The normative solid-state reaction process was adopted to prepare Li3Mg4NbO8 ceramics with LiF addition. We investigated the impacts of LiF additive on the crystal structure, sinterabillity as well as dielectric performance at microwave region of the Li3Mg4NbO8-basic ceramics. XRD analysis confirmed that the addition of LiF to Li3Mg4NbO8 lead to the formation of new phase Li4Mg4NbO8F with cubic rock salt structure. The densified temperature of Li3Mg4NbO8-basic ceramics could be effectively reduced from 1150 oC to 900 oC with LiF addition. Both the permitivity (εr) and quality factor (Qf) of present ceramics were is closely correlated with the bulk density and cell volume. The 900 oC-sintered Li3Mg4NbO8-basic ceramics owned excellent chemical compatibility with silver and optimized microwave dielectric performance (εr ~13. 4, Qf ~ 32,400 GHz at 9.4 GHz, and temperature coefficient of resonant frequency (τf) ~ -43.0 ppm/℃


Keywords: Ceramics, Li3Mg4NbO8, crystal structure, microwave dielectric properties

This Article

  • 2021; 22(6): 675-678

    Published on Dec 31, 2021

  • 10.36410/jcpr.2021.22.6.675
  • Received on Jun 28, 2021
  • Revised on Sep 8, 2021
  • Accepted on Sep 11, 2021

Correspondence to

  • Cuijin Pei

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

  • E-mail: pcj0125@163.com