Articles
  • Effects of ZrO2 on the properties and dry-pressing preparation of mullite based crossing network structure

  • Weixia Dong*, Yan Liang, Qifu Bao, Xingyong Gu and Jing-wei Yang

  • Department of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, P. R. 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

Mullite based crossing network structure were dry-pressing prepared by using waste gangue and calmogastrin as the main raw material. Effects of ZrO2 on the properties of the samples were studied. The samples were characterized by X-ray diffraction, scanning electron microscopy and the corresponding energy dispersive analysis. The experiment results showed that when ZrO2 content was 20%, the sample reached 123.21 MPa of bending strength, 123.75% of bending strength retention rate and the coefficient of thermal expansion of 5.023×106/oC-1. It could be attributed to the crossing network structure of the mullite, which produced a lot of pore porosity to accommodate a certain expansion deformation and thus alleviate the heat stress. Moreover, micro cracks around the porosity can be formed in the main crack tip region, which decreases local elastic strain energy and restrains the crack propagation and thus enhances the materials properties


Keywords: Waste gangue, Mullite based crossing network structure, ZrO2, drying preparation, Bending strength

This Article

  • 2021; 22(3): 317-322

    Published on Jun 30, 2021

  • 10.36410/jcpr.2021.22.3.317
  • Received on Sep 25, 2020
  • Revised on Nov 25, 2020
  • Accepted on Dec 4, 2020

Correspondence to

  • Weixia Dong

  • Department of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, P. R. China
    Tel : +86-571-8480007 Fax: +86-798-8480007

  • E-mail: weixia_dong@sina.com