Nano-laminated BN modified graphite reinforced unfired MgO-C refractories: Preparation, properties and strengthening mechanism

被引：15
作者：
Fan, Shutong [1 ]
Deng, Chengji [1 ]
Yu, Chao [1 ]
Liu, Zhenglong [1 ]
Ding, Jun [1 ]
机构：
[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2024年 / 29卷
基金：
中国国家自然科学基金;
关键词：
MgO-C refractory; Modified graphite; Mechanical properties; Oxidation resistance; THERMAL-SHOCK RESISTANCE; MOLTEN-SALT SYNTHESIS; LOW-CARBON; FRACTURE-BEHAVIOR; FLAKE GRAPHITE; MICROSTRUCTURE; COMPOSITE; EVOLUTION; WHISKERS; POWDER;
D O I：
10.1016/j.jmrt.2024.02.201
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To solve the problem of deterioration of oxidation resistance and thermal shock resistance caused by low carbonization of MgO-C refractories, nano-laminated BN modified graphite was prepared by the molten salt method to reinforce unfired MgO-C refractories. The findings revealed that the introduction of nano-laminated BN modified graphite significantly improved the mechanical properties. Moreover, the oxidation index of MgO-C refractories with 4 wt% nano-laminated BN modified graphite was 34% lower than that of the unadded sample, and the residual strength after thermal shock was significantly increased by 224%. Furthermore, incorporating nano-laminated BN modified graphite facilitated the formation of columnar Mg2SiO4, octagonal columnar MgAl2O4, and MgO-Mg2SiO4-MgAl2O4-Mg3B2O6 dense layers, thereby contribute to overall performance improvements.
引用
收藏
页码：4833 / 4844
页数：12
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