Stability properties and structural characteristics of CaO-partially stabilized zirconia ceramics synthesized from fused ZrO₂ by microwave sintering
Chen, Guo; Ling, Yeqing; Li, Qiannan; Zheng, Hewen; Li, Kangqiang; Jiang, Qi; Gao, Lei; Omran, Mamdouh; Peng, Jinhui; Chen, Jin (2020-04-03)
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
© 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/
https://urn.fi/URN:NBN:fi-fe2020040810736
Tiivistelmä
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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