熔盐法合成α-Si3N4-AlN复合粉体及其抗水化性能

doi:10.3969/j.issn.1001-1935.2023.01.006

耐火材料 ›› 2023, Vol. 57 ›› Issue (1): 27-30.DOI: 10.3969/j.issn.1001-1935.2023.01.006

熔盐法合成α-Si₃N₄-AlN复合粉体及其抗水化性能

王森, 梁峰, 王晓函, 谷昊辉, 吴帅兵, 吕功业, 张海军

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:2022-04-01 出版日期:2023-02-15 发布日期:2023-02-21
作者简介:王森:男,1995年生,硕士研究生。E-mail:1136117810@qq.com
基金资助:
国家自然科学基金面上资助项目(518722210,52072274);先进耐火材料国家重点实验室开放基金资助项目(SKLAR202207);武汉科技大学煤转化与新型炭材料湖北省重点实验室基金资助项目。

Synthesis and hydration resistance of α-Si₃N₄-AlN composite powder by molten salt method

Wang Sen, Liang Feng, Wang Xiaohan, Gu Haohui, Wu Shuaibing, Lyu Gongye, Zhang Haijun

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

Received:2022-04-01 Online:2023-02-15 Published:2023-02-21

摘要/Abstract

摘要： 以Si粉、三聚氰胺(C₃H₆N₆)和AlN粉为原料,以NaCl-NaBr为熔盐介质,采用熔盐法(以盐、料质量比为2∶1)制备α-Si₃N₄-AlN复合粉体。研究了反应原料中AlN粉添加量(m(Si粉)∶m(C₃H₆N₆)∶m(AlN粉)分别为1∶2∶0、1∶2∶0.2、1∶2∶0.4、1∶2∶0.6和1∶2∶1)和反应温度(分别为1 100、1 150和1 200 ℃)对制备的α-Si₃N₄-AlN复合粉体物相组成、显微结构和抗水化性能的影响。结果表明:在Si粉、C₃H₆N₆、AlN粉质量比为1∶2∶0.6时,在1 200 ℃保温2 h后,Si粉被全部氮化为α-Si₃N₄,所得产物α-Si₃N₄-AlN复合粉的抗水化性能比原料AlN粉的显著提高。

关键词: AlN粉体, 熔盐法, α-Si₃N₄-AlN复合粉体, 抗水化性能

Abstract: α-silicon nitride-aluminum nitride (α-Si₃N₄-AlN) composite powders were successfully synthesized by the molten salt method,using silicon powder,melamine (C₃H₆N₆) and aluminum nitride (AlN) powders as raw materials,and NaCl-NaBr as the molten salt medium.The effects of the AlN powder addition,namely m(Si powder)∶m(C₃H₆N₆)∶m(AlN powder) (1∶2∶0,1∶2∶0.2,1∶2∶0.4,1∶2∶0.6 and 1∶2∶1) and the reaction temperature (1 100,1 150 and 1 200 ℃) on the phase composition,the microstructure and the hydration resistance of the synthesized α-Si₃N₄-AlN composite powders were investigated.The results show that at the mass ratio of 1∶2∶0.6,Si powder is completely nitridized to α-Si₃N₄ after firing at 1 200 ℃ for 2 h.The hydration resistance of the α-Si₃N₄-AlN composite powder is significantly improved compared with that of the raw material AlN powder.

Key words: aluminum nitride powder, molten salt method, α-silicon nitride-aluminum nitride composite powder, hydration resistance

中图分类号:

TQ175

王森, 梁峰, 王晓函, 谷昊辉, 吴帅兵, 吕功业, 张海军. 熔盐法合成α-Si₃N₄-AlN复合粉体及其抗水化性能[J]. 耐火材料, 2023, 57(1): 27-30.

Wang Sen, Liang Feng, Wang Xiaohan, Gu Haohui, Wu Shuaibing, Lyu Gongye, Zhang Haijun. Synthesis and hydration resistance of α-Si₃N₄-AlN composite powder by molten salt method[J]. Refractories, 2023, 57(1): 27-30.

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熔盐法合成α-Si₃N₄-AlN复合粉体及其抗水化性能

Synthesis and hydration resistance of α-Si₃N₄-AlN composite powder by molten salt method

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