University of Oulu

Guo Chen, Qiannan Li, Yeqing Ling, Hewen Zheng, Jin Chen, Qi Jiang, Kangqiang Li, Jinhui Peng, Mamdouh Omran, Lei Gao, Phase stability and microstructure morphology of microwave-sintered magnesia-partially stabilised zirconia, Ceramics International, Volume 47, Issue 3, 2021, Pages 4076-4082, ISSN 0272-8842, https://doi.org/10.1016/j.ceramint.2020.09.281

Phase stability and microstructure morphology of microwave-sintered magnesia-partially stabilised zirconia

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Author: Chen, Guo1,2; Li, Qiannan1; Ling, Yeqing1;
Organizations: 1Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming, 650500, PR China
2Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, PR China
3Process Metallurgy Research Group, Faculty of Technology, University of Oulu, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe202201209541
Language: English
Published: Elsevier, 2021
Publish Date: 2022-09-30
Description:

Abstract

In this work, microwave heating approach was introduced into the preparation process of zirconia materials to overcome the tricky technical defects during the traditional electric arc furnace method. Magnesia-partially stabilised zirconia (MgO-PSZ) with enhanced stability and a uniform microstructure was prepared via microwave heating of a ZrO₂ sample manufactured by the electric arc furnace method. The effects of microwave heating on the phase stability properties, microstructure, and surface morphology of the prepared MgO-PSZ sample were evaluated via X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, and Scanning electron microscopy, and the obtained results suggested that the stability rate of the MgO-PSZ sample improved from the initial value of 81.19%–94.82% after microwave heating at 1300 °C for 1 h. As a result of the martensitic conversion of ZrO₂ material, the m-ZrO₂ diffraction peaks were suppressed at the same time. Additionally, a similar changing trend was noticed in the XRD pattern, Raman spectrum, and FT-IR spectrum, indicating a decrease in the m-ZrO₂ phase content in the microwave treated products. Furthermore, the microstructure on the surface of the microwave-sintered MgO-PSZ sample was improved in contrast to the raw MgO-PSZ sample, and became relatively more uniform and smooth. This study determined the optimal microwave heating conditions for the preparation of MgO-PSZ material with enhanced performance, and can provided as a good foundation for developing the further related research on zirconia materials preparing by microwave heating technology.

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Series: Ceramics international
ISSN: 0272-8842
ISSN-E: 1873-3956
ISSN-L: 0272-8842
Volume: 47
Issue: 3
Pages: 4076 - 4082
DOI: 10.1016/j.ceramint.2020.09.281
OADOI: https://oadoi.org/10.1016/j.ceramint.2020.09.281
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: The authors would like to acknowledge the National Natural Science Foundation of China (Grant No. 51764052) and the Innovative Research Team (in Science and Technology) in the University of Yunnan province for the financial support.
Copyright information: © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license by http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/