Fabrication and thermal shock behavior of periclase-forsterite aggregates with micro-nanometer dual-pore-size structures. Issue 2 (15th January 2023)

• Record Type: Journal Article
• Authors: Qi, Xin; Qi, Dabin; Luo, Xudong; Wang, Shaoyang; Zhang, Ling; Zhao, Jialiang; You, Jiegang; Liu, Yan; Zhou, Yuanpeng; Pan, Zhenzhong
• Is Part Of: Ceramics international. Volume 49:Issue 2(2023)
• Page Start: 1811
• Page End: 1819
• Publication Date: 2023-01-15
• Subjects: Periclase -- Forsterite -- Thermal shock resistance -- Refractory -- Micro-nanopore; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.09.144
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: To improve the service life of periclase-forsterite refractories, it is important to develop aggregates with high thermal shock resistance. In this study, periclase-forsterite aggregates with good resistance to thermal shock and micro-nanopores were prepared using high-silicon magnesite, silica, and silica sol. Microcracks were generated in the multiphase aggregates, which inhibited the continuous propagation of cracks during thermal shock through mismatched thermal expansion coefficients. Based on Hasselman's thermal shock stability factor, the reduction in the average thermal expansion coefficient and improved mechanical characteristics were critical factors in improving the thermal shock resistance of the multiphase aggregates. As a binder, silica sol provided nano-SiO2 and superplasticity, which facilitated the formation of micro-nanopores and strengthened the combination of the various phases in the aggregates.