催化剂对Al2O3-SiC-C浇注料显微结构和性能的影响

doi:10.3969/j.issn.1001-1935.2022.04.010

耐火材料 ›› 2022, Vol. 56 ›› Issue (4): 320-324.DOI: 10.3969/j.issn.1001-1935.2022.04.010

催化剂对Al₂O₃-SiC-C浇注料显微结构和性能的影响

程翠丽, 赵子尖, 任世怡, 李磊, 陈平安, 李享成, 朱伯铨

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:2021-08-31 出版日期:2022-08-15 发布日期:2022-11-09
作者简介:程翠丽:女,2000年生,本科生。E-mail:1683853063@qq.com
基金资助:
国家自然科学基金资助项目(51774218);湖北省大学生创新创业训练计划项目(S202010488009)。

Effects of catalyst on microstructure and properties of Al₂O₃-SiC-C castables

Cheng Cuili, Zhao Zijian, Ren Shiyi, Li Lei, Chen Ping'an, Li Xiangcheng, Zhu Boquan

The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

Received:2021-08-31 Online:2022-08-15 Published:2022-11-09

摘要/Abstract

摘要： 以球磨法制备La₂O₃掺杂Ni,并以此为催化剂,以板状刚玉、SiC粉、球状沥青、α-Al₂O₃微粉、SiO₂微粉、Al-Si合金粉和铝酸钙水泥为主要原料,制备了Al₂O₃-SiC-C浇注料试样。研究了催化剂和热处理温度(500、700、900、1 100和1 450 ℃分别保温3 h)对试样显微结构和性能的影响。结果表明,球磨后Ni的XRD衍射峰强度明显降低,角度产生偏移,表明La固溶到Ni中,Ni的晶格产生畸变;随着热处理温度升高,添加催化剂的试样中一维相(CNTs和SiC晶须)和二维相(钙铝黄长石)逐渐增多,抗折强度和耐压强度分别达到极大值。因此,添加La₂O₃掺杂Ni催化剂可以明显增加浇注料中一维和二维增强相的生成量,提高浇注料试样的强度。

关键词: Al₂O₃-SiC-C浇注料, La₂O₃, Ni, 增强增韧

Abstract: The La₂O₃ doping Ni was prepared by ball-milling method and added into the Al₂O₃-SiC-C castable specimens as the catalyst,which were prepared using tabular corundum,SiC powder,ball pitch,α-Al₂O₃ micropowder,SiO₂ micropowder,Al-Si alloy powder,and calcium aluminate cement as raw materials.Effects of the catalyst and the hot treatment temperatures (500,700,900,1 100,and 1 450 ℃ for 3 h ) on the microstructure and the properties of the castables were investigated.The results reveal that after ball milling,the X-ray diffraction peak intensity of Ni decreases drastically and the angle of Ni shifts,suggesting that the lattice of Ni is distorted due to the La dissolution into Ni.With the temperature rising,the one-dimensional phases (CNTs and SiC whiskers) and two-dimensional phase (gehlenite) in the castables containing catalyst increase,the modulus of rupture and the crushing strength reach the maximum values,respectively.Therefore,the La₂O₃ doping Ni can obviously increase the one-dimensional and two-dimensional strengthening phases in the castables and enhance the strength of the castables.

Key words: alumina-silicon carbide-carbon castables, lanthana, nickel, strengthening and toughening

中图分类号:

TQ175

程翠丽, 赵子尖, 任世怡, 李磊, 陈平安, 李享成, 朱伯铨. 催化剂对Al₂O₃-SiC-C浇注料显微结构和性能的影响[J]. 耐火材料, 2022, 56(4): 320-324.

Cheng Cuili, Zhao Zijian, Ren Shiyi, Li Lei, Chen Ping'an, Li Xiangcheng, Zhu Boquan. Effects of catalyst on microstructure and properties of Al₂O₃-SiC-C castables[J]. Refractories, 2022, 56(4): 320-324.

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催化剂对Al₂O₃-SiC-C浇注料显微结构和性能的影响

Effects of catalyst on microstructure and properties of Al₂O₃-SiC-C castables

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