膨胀石墨/碳纳米管复合增强铝碳耐火材料性能研究

doi:10.3969/j.issn.1001-1935.2025.02.003

耐火材料 ›› 2025, Vol. 59 ›› Issue (2): 105-110.DOI: 10.3969/j.issn.1001-1935.2025.02.003

膨胀石墨/碳纳米管复合增强铝碳耐火材料性能研究

郭宇琦^1,2), 廖宁^1,2), 李亚伟^1,2), 王庆虎^1,2), 朱天彬^1,2)

1)武汉科技大学先进耐火材料全国重点实验室湖北武汉 430081
2)高温材料与炉衬技术国家地方联合工程研究中心湖北武汉 430081

收稿日期:2024-09-09 出版日期:2025-04-15 发布日期:2025-04-14
通讯作者: 廖宁,男,1988年生,博士,教授。E-mail:liaoning@wust.edu.cn
作者简介:郭宇琦:男,1998年生,硕士研究生。E-mail:guoyuqi@wust.edu.cn
基金资助:
国家自然科学基金项目(51872211)。

Properties of Al₂O₃-C refractories enhanced with expanded graphite/carbon nanotube composites

Guo Yuqi, Liao Ning, Li Yawei, Wang Qinghu, Zhu Tianbin

First author’s address:State Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

Received:2024-09-09 Online:2025-04-15 Published:2025-04-14

摘要/Abstract

摘要： 为充分发挥低维纳(微)米材料的协同强韧化作用,以板状刚玉、活性氧化铝微粉、单质硅、纳米炭黑为原料,以热固性酚醛树脂为结合剂,分别引入膨胀石墨(EG)、预合成碳纳米管改性的膨胀石墨(EG-CNTs)以及表面负载含镍催化剂的膨胀石墨(EG-Ni),经混料、成型、固化后,再经800、1 000、1 200和1 400 ℃保温3 h热处理,制备了低碳铝碳耐火材料。研究了膨胀石墨种类(EG、EG-CNTs、EG-Ni)对铝碳耐火材料结构演变及性能的影响。结果表明:1)引入EG-CNTs、EG-Ni的试样的常温抗折强度比引入EG的试样的提高很多,因为EG-CNTs、EG-Ni均能促进试样中SiC晶须的形成,从而起到了很好的增强作用。2)引入EG-Ni的试样的抗热震性最好,因为EG-Ni可以原位生成碳纳米管,伴随有碳纳米管/SiC晶须的原位协同增韧的作用,可以显著提高材料的抗热震性。

关键词: 铝碳耐火材料, 膨胀石墨, 碳纳米管, 力学性能, 抗热震性

Abstract: To fully utilize the synergistic strengthening-toughening effects of low-dimensional nano/micrometer materials,tabular corundum,activated alumina micropowder,silicon and nano carbon black were adopted as raw materials,with thermosetting phenolic resin as a binder.Three types of expanded graphite were introduced: expanded graphite (EG),pre-synthesized carbon nanotube-modified expanded graphite (EG-CNTs),and Ni-base catalyst-loaded expanded graphite (EG-Ni).After mixing,shaping,curing,and heat treatment at 800,1 000,1 200 and 1 400 °C for 3 h,low carbon Al₂O₃-C refractories were prepared.The impact of the different types of expanded graphite (EG,EG-CNTs and EG-Ni) on the structural evolution and performance of the refractories was investigated.The results demonstrate that the cold modulus of rupture of the samples with EG-CNTs or EG-Ni is much higher than that of the samples with EG,as EG-CNTs and EG-Ni both promote the formation of SiC whiskers in the samples,thereby playing a good role in strengthening.The sample with EG-Ni performs the best thermal shock resistance,because EG-Ni can generate carbon nanotubes in situ,accompanied by the synergistic toughening effect of carbon nanotubes/SiC whiskers,which significantly improves the thermal shock resistance of the material.

Key words: Al₂O₃-C refractories, expanded graphite, carbon nanotubes, mechanical properties, thermal shock resistance

中图分类号:

TQ175

郭宇琦, 廖宁, 李亚伟, 王庆虎, 朱天彬. 膨胀石墨/碳纳米管复合增强铝碳耐火材料性能研究[J]. 耐火材料, 2025, 59(2): 105-110.

Guo Yuqi, Liao Ning, Li Yawei, Wang Qinghu, Zhu Tianbin. Properties of Al₂O₃-C refractories enhanced with expanded graphite/carbon nanotube composites[J]. Refractories, 2025, 59(2): 105-110.

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膨胀石墨/碳纳米管复合增强铝碳耐火材料性能研究

Properties of Al₂O₃-C refractories enhanced with expanded graphite/carbon nanotube composites

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Properties of Al₂O₃-C refractories enhanced with expanded graphite/carbon nanotube composites