ZrC改性石墨对低碳Al2O3-C耐火材料结构与性能的影响

doi:10.3969/j.issn.1001-1935.2023.04.005

耐火材料 ›› 2023, Vol. 57 ›› Issue (4): 295-299.DOI: 10.3969/j.issn.1001-1935.2023.04.005

ZrC改性石墨对低碳Al₂O₃-C耐火材料结构与性能的影响

邝昌柳, 王杏, 刘正龙, 丁军, 余超, 邓承继, 祝洪喜

武汉科技大学省部共建耐火材料与冶金国家重点实验室湖北武汉 430081

收稿日期:2022-07-31 出版日期:2023-08-15 发布日期:2023-08-30
通讯作者: 丁军,男,1982年生,博士,教授。E-mail:dingjun@wust.edu.cn
作者简介:邝昌柳:女,1997年生,硕士研究生。E-mail:1132428619@qq.com
基金资助:
国家自然科学基金区域创新发展联合基金(U20A20239);湖北省重点研发计划(2020BAA028)。

Effect of ZrC modified graphite on microstructure and properties of low-carbon Al₂O₃-C refractories

Kuang Changliu, Wang Xing, Liu Zhenglong, Ding Jun, Yu Chao, Deng Chengji, Zhu Hongxi

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

Received:2022-07-31 Online:2023-08-15 Published:2023-08-30

摘要/Abstract

摘要： 为解决目前低碳Al₂O₃-C耐火材料性能下降、寿命缩短等问题,以Zr粉和鳞片石墨为原料,以NaCl和NaF为熔盐介质,在氩气气氛中于1 000 ℃保温3 h合成了ZrC改性石墨。然后以电熔白刚玉、α-Al₂O₃粉、Al粉、Si粉、鳞片石墨和ZrC改性石墨为原料,以酚醛树脂为结合剂制备了低碳Al₂O₃-C耐火材料试样。研究了ZrC改性石墨添加量(加入质量分数分别为0、1%、3%、5%)对低碳Al₂O₃-C耐火材料的物相组成、显微形貌、物理性能的影响。结果表明:与仅添加鳞片石墨的试样相比,引入1%~3%(w)的ZrC改性石墨可显著提高低碳Al₂O₃-C耐火材料试样的力学性能,但是当引入5%(w)的ZrC改性石墨时,降低了其性能。添加3%(w)ZrC改性石墨时,试样的力学性能最优,其常温抗折强度和常温耐压强度分别为22.3和97.5 MPa。

关键词: ZrC, 改性石墨, 低碳Al₂O₃-C耐火材料, 显微结构, 力学性能

Abstract: In order to solve the problems of performance deterioration and short life of low-carbon Al₂O₃-C refractories,ZrC modified graphite was synthesized in argon atmosphere at 1 000 ℃ for 3 h using Zr powder and flake graphite as raw materials,NaCl and NaF as the molten salt medium. Then,low-carbon Al₂O₃-C refractory samples were prepared using white fused corundum,α-Al₂O₃ powder,Al powder,Si powder,flake graphite and ZrC modified graphite as raw materials,and phenolic resin as the binder.Effects of the ZrC modified graphite addition (0,1%,3%,and 5%,by mass) on the phase composition,microstructure and physical properties of the low carbon Al₂O₃-C refractories were studied.The results show that the introduction of 1%-3% ZrC modified graphite can significantly improve the mechanical properties of the low carbon Al₂O₃-C refractory samples compared with samples with only flake graphite.However,5% ZrC modified graphite deteriorates the properties.The sample with 3% ZrC modified graphite has the best mechanical properties,22.3 MPa of cold modulus of rupture and 97.5 MPa of cold crushing strength.

Key words: ZrC, modified graphite, low-carbon Al₂O₃-C refractories, microstructure, mechanical properties

中图分类号:

TQ175

邝昌柳, 王杏, 刘正龙, 丁军, 余超, 邓承继, 祝洪喜. ZrC改性石墨对低碳Al₂O₃-C耐火材料结构与性能的影响[J]. 耐火材料, 2023, 57(4): 295-299.

Kuang Changliu, Wang Xing, Liu Zhenglong, Ding Jun, Yu Chao, Deng Chengji, Zhu Hongxi. Effect of ZrC modified graphite on microstructure and properties of low-carbon Al₂O₃-C refractories[J]. Refractories, 2023, 57(4): 295-299.

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ZrC改性石墨对低碳Al₂O₃-C耐火材料结构与性能的影响

Effect of ZrC modified graphite on microstructure and properties of low-carbon Al₂O₃-C refractories

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