Catalytic Fabrication of SiC/SiO2 coated graphite and its behaviour in Al2O3–C castable systems. Issue 13 (September 2019)

• Record Type: Journal Article
• Authors: Bi, Yubao; Zhang, Haijun; Wang, Huifang; Duan, Shaopeng; Jia, Quanli; Ge, Shengtao; Zhang, Shaowei
• Is Part Of: Ceramics international. Volume 45:Issue 13(2019)
• Page Start: 16180
• Page End: 16187
• Publication Date: 2019-09
• Subjects: Graphite coating -- Sol-gel -- Catalytic reaction -- Oxidation resistance -- Slag corrosion resistance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.05.139
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: SiC/SiO2 coated graphite was prepared via a combined sol-gel coating and catalytic conversion route, using graphite flake and tetraethyl orthosilicate as the starting materials, and Fe(NO3 )3 ·9H2 O as the catalyst precursor. X-ray diffraction analysis and microstructural examination revealed that a homogeneous coating comprising SiC and cristobalite (SiO2 ) and covering the whole surface of graphite was formed. As prepared SiC/SiO2 coated graphite exhibited better oxidation resistance and water wettability than its uncoated counterpart. Also, oxidation resistance and slag corrosion resistance of a model Al2 O3 –C castable using coated graphite as a carbon source were better than in the case of its counterpart using uncoated graphite.