University of Oulu

Kangqiang Li, Qi Jiang, Jin Chen, Jinhui Peng, Xinpei Li, Sivasankar Koppala, Mamdouh Omran, Guo Chen, The controlled preparation and stability mechanism of partially stabilized zirconia by microwave intensification, Ceramics International, Volume 46, Issue 6, 2020, Pages 7523-7530, ISSN 0272-8842, https://doi.org/10.1016/j.ceramint.2019.11.251

The controlled preparation and stability mechanism of partially stabilized zirconia by microwave intensification

Saved in:
Author: Li, Kangqiang1; Jiang, Qi1; Chen, Jin1,2;
Organizations: 1Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, PR China
2Key Laboratory of Green-Chemistry Materials in University of Yunnan Province, Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming, 650500, 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-fe2020040914227
Language: English
Published: Elsevier, 2020
Publish Date: 2021-11-28
Description:

Abstract

Partially stabilized zirconia (PSZ) occupies an important application portion in ceramics materials and refractories materials. In this work, calcium oxide-partially stabilized zirconia (CaO-PSZ) ceramics were prepared from fused zirconia by microwave sintering, with its microstructure and stability properties characterized by XRD and SEM. Results indicated that the heating rate, cooling rate, quenching temperature and isothermal treatment time rendered different influence on the stability properties, which was mainly ascribed to the reversible martensitic transformation of zirconia ceramics. Additionally, a mixed-phase composed by cubic phase ZrO₂ (c-ZrO₂) and monoclinic phase ZrO₂ (m-ZrO₂) appeared after fused zirconia treated by microwave sintering at 1450 °C for 2 h, indicating the formation of CaO-PSZ ceramics, which the finding was consistent with the SEM and EDAX analysis. Meanwhile, CaO stabilizer precipitated behavior at the crystal boundary, with the formation of acicular grains and fine particles, further rendering a toughening effect to CaO-PSZ ceramics. This work can provide important theoretical and practical significance for applications of microwave sintering to prepare CaO-PSZ ceramics material, even extending further applications in functional materials and structural materials.

see all

Series: Ceramics international
ISSN: 0272-8842
ISSN-E: 1873-3956
ISSN-L: 0272-8842
Volume: 46
Issue: 6
Pages: 7523 - 7530
DOI: 10.1016/j.ceramint.2019.11.251
OADOI: https://oadoi.org/10.1016/j.ceramint.2019.11.251
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Copyright information: © 2019. 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/