University of Oulu

Guo Chen, Yeqing Ling, Qiannan Li, Hewen Zheng, Kangqiang Li, Qi Jiang, Lei Gao, Mamdouh Omran, Jinhui Peng, Jin Chen, Stability properties and structural characteristics of CaO-partially stabilized zirconia ceramics synthesized from fused ZrO2 by microwave sintering, Ceramics International, Volume 46, Issue 10, Part B, 2020, Pages 16842-16848, ISSN 0272-8842, https://doi.org/10.1016/j.ceramint.2020.03.261

Stability properties and structural characteristics of CaO-partially stabilized zirconia ceramics synthesized from fused ZrO₂ by microwave sintering

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Author: Chen, Guo1,2; Ling, Yeqing1; Li, Qiannan1;
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-fe2020040810736
Language: English
Published: Elsevier, 2020
Publish Date: 2022-04-03
Description:

Abstract

Partially stabilized zirconia (PSZ) ceramics play a significant role as fundamental ceramics and refractory materials. In this work, a CaO-PSZ ceramics material was synthesized from fused ZrO₂ by microwave sintering. The stability properties and structural characteristics of the products were characterized via X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results indicated that in a microwave field, the duration and sintering temperature presented similar influence trends for the stability properties of ZrO₂ ceramics materials, which the finding was assigned to the phase transformation of ZrO₂ with temperature change. In addition, following the microwave treatment of the fused zirconia sample at 1450 °C for 2.0 h, a cubic and monoclinic mixed phase was formed. These outcomes corresponded to the results from the SEM and energy dispersive X-ray (EDAX) analysis, demonstrating the successful preparation of the CaO-PSZ ceramics. The toughness of the ceramics was improved, which could be attributed to the formation of CaO-stabilizer-precipitated acicular crystals. The theoretical fundamentals and the practical cases presented in this paper are beneficial for the application of the microwave sintering technology in the synthesis of CaO-PSZ ceramics.

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Series: Ceramics international
ISSN: 0272-8842
ISSN-E: 1873-3956
ISSN-L: 0272-8842
Volume: 46
Issue: 10 : Part B
Pages: 16842 - 16848
DOI: 10.1016/j.ceramint.2020.03.261
OADOI: https://oadoi.org/10.1016/j.ceramint.2020.03.261
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: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/