氮基耐火材料与氧化镧和铝酸镧的界面反应研究

doi:10.3969/j.issn.1001-1935.2025.05.001

耐火材料 ›› 2025, Vol. 59 ›› Issue (5): 369-374.DOI: 10.3969/j.issn.1001-1935.2025.05.001

• 研究开发 • 下一篇

氮基耐火材料与氧化镧和铝酸镧的界面反应研究

马飞祥^1,2), 李红霞^1,2), 刘国齐²⁾, 顾强²⁾

1)河南科技大学材料科学与工程学院河南洛阳 471003
2)中钢集团洛阳耐火材料研究院有限公司先进耐火材料全国重点实验室河南洛阳 471039

收稿日期:2025-01-03 出版日期:2025-10-15 发布日期:2025-10-22
通讯作者: 李红霞,女,1965年生,博士,教授级高级工程师。 E-mail:lihongx0622@126.com
作者简介:马飞祥:男,1995年生,博士研究生。E-mail:2537245145@qq.com
基金资助:
国家青年科学基金项目(52302031);国家自然科学基金项目(51932008, 51772277);华中千人工程(204200510011)。

Interfacial reactions of nitrogen-based refractories with lanthanum oxide and lanthanum aluminate

Ma Fei-xiang, Li Hongxia, Liu Guoqi, Gu Qiang

First author's address:School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003,Henan,China

Received:2025-01-03 Online:2025-10-15 Published:2025-10-22

摘要/Abstract

摘要： 为开发稀土钢专用水口内衬材料,首先以La₂O₃和Al₂O₃粉为原料,于1 400 ℃保温3 h高温固相合成LaAlO₃粉体;再分别将BN、AlN、Si₃N₄、TiN粉体以PVA为结合剂在120 MPa压力下压制成Φ30 mm×7 mm的衬底试样,在其表面分别放置等量的La₂O₃和LaAlO₃粉,在还原和氩气气氛条件下于1 550 ℃反应3 h。研究了4种氮化物(BN、Si₃N₄、AlN、TiN)衬底试样分别与La₂O₃和LaAlO₃在还原和氩气气氛条件下的界面反应。结果表明:在还原和氩气气氛下,4种氮化物与La₂O₃反应的强弱顺序皆是Si₃N₄>BN>AlN>TiN;在还原气氛下,4种氮化物与LaAlO₃反应的强弱顺序是Si₃N₄>AlN≈TiN>BN,但在氩气气氛下,其反应顺序是Si₃N₄>BN>AlN≈TiN;TiN在还原和氩气气氛下均具有较好的结构稳定性,与La₂O₃、LaAlO₃反应较弱,是一种较好的稀土钢水口防堵内衬材料。

关键词: 氮基耐火材料, 界面反应, 稀土钢, 防堵内衬

Abstract: To develop specific lining materials for rare earth steel nozzles,LaAlO₃ powder was first synthesized by high-temperature solid-phase synthesis at 1 400 ℃ for 3 h using La₂O₃ and Al₂O₃ powders as raw materials.Then BN,AlN,Si₃N₄ and TiN powders were pressed into Φ30 mm×7 mm substrate samples with PVA as the binder under 120 MPa.Equal amounts of La₂O₃ and LaAlO₃ powders were placed on their surfaces,reacting at 1 550 ℃ for 3 h in different atmospheres (reducing and argon conditions).The interfacial reactions of the four nitride (BN,Si₃N₄,AlN,and TiN) substrate samples with La₂O₃ and LaAlO₃ in different atmospheres were studied,respectively.The results show that in reducing and argon atmospheres,the intensity order of the reactions between the four nitrides and La₂O₃ is Si₃N₄>BN>AlN>TiN.In the reducing atmosphere,the reaction intensity order of the four nitrides with LaAlO₃ is Si₃N₄>AlN≈TiN>BN.However,in the argon atmosphere,the order is Si₃N₄>BN>AlN≈TiN.TiN has good structural stability in both reducing and argon atmospheres,and reacts slightly with La₂O₃ and LaAlO₃.It is a relatively good anti-clogging lining material for rare earth steel nozzles.

Key words: nitride-based refractories, interfacial reaction, rare earth steel, anti-clogging lining

中图分类号:

TF777

马飞祥, 李红霞, 刘国齐, 顾强. 氮基耐火材料与氧化镧和铝酸镧的界面反应研究[J]. 耐火材料, 2025, 59(5): 369-374.

Ma Fei-xiang, Li Hongxia, Liu Guoqi, Gu Qiang. Interfacial reactions of nitrogen-based refractories with lanthanum oxide and lanthanum aluminate[J]. Refractories, 2025, 59(5): 369-374.

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氮基耐火材料与氧化镧和铝酸镧的界面反应研究

Interfacial reactions of nitrogen-based refractories with lanthanum oxide and lanthanum aluminate

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