硅酸盐学报2017，Vol.45Issue(3)：433-440,8.DOI:10.14062/j.issn.0454-5648.2017.03.16
添加硅和硅微粉氧化铝–碳纳米管耐火材料的制备与性能
Effects of Silicon and Microsilica Additive on Microstructure and Mechanical Properties of Al2O3–C Multi-walled Carbon Nanotubes Refractories
摘要
Abstract
The structure evolution of multi-walled carbon nanotubes (MWCNTs) in Al2O3–C matrix with silicon and microsilica additives was investigated. The influences of silicon/microsilica additives as well as silicon additive on the properties of Al2O3–C refractories were analyzed. The results show that a greater content of SiO vapor is formed through the reaction of silicon and microsilica, which stimulates the structure evolution of MWCNTs and facilitates the formation of SiC whiskers at > 800℃. With the formation of large amount of SiC whiskers, the CMOR of Al2O3–C refractories with silicon and microsilica reaches 22.56 MPa, which is greater than that of refractories with only silicon(i.e., 19.24 MPa). However, the specimen without microsilica has a greater residual strength ratio (i.e., 43.51%), compared to the specimen with microsilica (i.e., 28.65%). It is indicated that the MWCNTs are more beneficial to toughening, and SiC whiskers are responsible for strengthening.关键词
铝碳耐火材料/显微结构/力学性能/硅微粉/多壁碳纳米管Key words
alumina–carbon refractories/microstructure/mechanical properties/combination of silicon and microsilica/multi-walled carbon nanotubes分类
化学化工引用本文复制引用
廖宁,李亚伟,桑绍柏..添加硅和硅微粉氧化铝–碳纳米管耐火材料的制备与性能[J].硅酸盐学报,2017,45(3):433-440,8.基金项目
国家自然科学基金(51372176,51574186)资助. （51372176,51574186）
