Articles
  • Improved temperature stability of Ba0.5Sr0.5TiO3/ZnAl2O4 ceramics by controlling microstructure with sintering behavior

  • Yuze Xuea, Mingwei Zhanga,*, Le Xinb, Luchao Rena, Panpan Lva, Hang Zhana, Jing Hea and Jiwei Zhaic

  • aSchool of Materials Science and Engineering, Shandong University of Technology, Zibo 255049, Shandong, People’s Republic of China
    bPrimary Education, Zibo Normal College, Zibo 255130, Shandong, People’s Republic of China
    c    School of Materials Science and Engineering, Tongji University, Shanghai 201804, Shanghai, People’s Republic of 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

0.2ZnAl2O4/0.8Ba0.5Sr0.5TiO3 ceramics with good dielectric temperature stability were synthesized by controlling sintering behavior. The relationship between sintering conditions, microstructure, and dielectric properties of ceramics was studied. Cubic structures were confirmed in all ceramics. Double sintering (DS) behavior can effectively improve the density, and the grain size has no obvious change compared with non-repeated sintering. The maximum dielectric permittivity (220 at 10 kHz) and minimum leakage current (3.98×10-6 A/cm2 at 0.25 kV/cm) are obtained in the DS ceramics, which is superior to those of the single sintering ceramics. This can be ascribed to the higher relative density of the DS ceramics in contrast to the single sintering ceramics. More importantly, the temperature stability of the DS sample in all samples is optimal due to the high surface energy at grain boundaries and improved density. This work demonstrates a route to produce ceramics with weak temperature sensitivity for microwave applications


Keywords: Ceramic composites, Dielectrics, Microstructure, Sintering

This Article

  • 2023; 24(2): 336-341

    Published on Apr 30, 2023

  • 10.36410/jcpr.2023.24.2.336
  • Received on Nov 14, 2022
  • Revised on Jan 6, 2023
  • Accepted on Jan 27, 2023

Correspondence to

  • Mingwei Zhang

  • School of Materials Science and Engineering, Shandong University of Technology, Zibo 255049, Shandong, People’s Republic of China
    Tel : +86-533-2781317 Fax: +86-533-2781317

  • E-mail: zhang6666666@163.com