Phase stability and microstructure morphology of microwave-sintered magnesia-partially stabilised zirconia. Issue 3 (1st February 2021)

• Record Type: Journal Article
• Authors: Chen, Guo; Li, Qiannan; Ling, Yeqing; Zheng, Hewen; Chen, Jin; Jiang, Qi; Li, Kangqiang; Peng, Jinhui; Omran, Mamdouh; Gao, Lei
• Is Part Of: Ceramics international. Volume 47:Issue 3(2021)
• Page Start: 4076
• Page End: 4082
• Publication Date: 2021-02-01
• Subjects: MgO-PSZ -- Phase stability -- Microstructure morphology -- Microwave heating; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.09.281
• Languages: English
• ISSNs: 0272-8842

Abstract

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.