University of Oulu

Ling, Y., Hao, X., Gui, Y., Qiu, H., Li, Q., Zheng, H., Omran, M., Gao, L., Chen, J., & Chen, G. (2021). Stability properties and microstructure properties of microwave-sintered CeO2 doped zirconia ceramics. Ceramics International.

Stability properties and microstructure properties of microwave-sintered CeO₂ doped zirconia ceramics

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Author: Ling, Yeqing1; Hao, Xiandong1; Gui, Yuxi1;
Organizations: 1Kunming Key Laboratory of Energy Materials Chemistry, Key Laboratory of Green-Chemistry Materials in University of Yunnan Province, Yunnan Minzu University, Kunming, 650500, PR China
2Faculty of Technology, University of Oulu, Finland
3Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming, 650500, PR China
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 4.2 MB)
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Language: English
Published: Elsevier, 2021
Publish Date: 2021-08-18


Nanosized CeO₂–ZrO₂ powders prepared by atmospheric pressure pyrolysis were used as raw materials to prepare CeO₂–ZrO₂ ceramics using microwave sintering. The samples were characterised using bulk density measurements, X-ray diffraction (XRD), Fourier Transform Infrared Spectrometer (FT-IR), Raman, and scanning electron microscopy (SEM). The purpose was to determine the optimised microwave sintering process for CeO₂–ZrO₂ ceramics and reveal the corresponding mechanism. The results show that with a CeO₂ addition content above 5 mol%, the tetragonal phase peak appeared obviously in the sample. The results show that the tetragonal phase peak appears when the CeO₂ content is more than 5 mol%. The dopants, namely CeO₂, have reduced the solid solution’s phase transformation temperature with the assistance of microwave heating. Additionally, the grain size of the CeO₂–ZrO₂ ceramics has shown a negative relationship with Ce content at a temperature of 900 °C. The reason is that the rapid sintering due to microwave sintering and the oxygen vacancies generated by CeO₂ can effectively inhibit grain growth. The regulation mechanism on microwave sintering of CeO₂–ZrO₂ ceramic was clarified, and the technical prototype of controlled prepared CeO₂–ZrO₂ ceramics by microwave sintering was constructed.

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Series: Ceramics international
ISSN: 0272-8842
ISSN-E: 1873-3956
ISSN-L: 0272-8842
Volume: In press
DOI: 10.1016/j.ceramint.2021.06.234
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: Financial supports from the National Natural Science Foundation of China (No: 51764052), the scientific research foundation of Yunnan Education Department (No: 2021Y657) and Innovative Research Team (in Science and Technology) in University of Yunnan Province were sincerely acknowledged.
Copyright information: © 2021 Elsevier Ltd and Techna Group S.r.l. This manuscript version is made available under the CC-BY-NC-ND 4.0 license