熔盐法合成α-Si_(3)N_(4)-AlN复合粉体及其抗水化性能  

Synthesis and hydration resistance of α-Si_(3)N_(4)-AlN composite powder by molten salt method

作　　者：王森 梁峰[1] 王晓函 谷昊辉 吴帅兵 吕功业 张海军[1] 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;不详)

机构地区：[1]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

出　　处：《耐火材料》2023年第1期27-30,共4页Refractories

基　　金：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。

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-Si_(3)N_(4)-AlN复合粉体。研究了反应原料中AlN粉添加量(m(Si粉)∶m(C_(3)H_(6)N_(6))∶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1100、1150和1200℃)对制备的α-Si_(3)N_(4)-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、C_(3)H_(6)N_(6)、AlN粉质量比为1∶2∶0.6时,在1200℃保温2 h后,Si粉被全部氮化为α-Si_(3)N_(4),所得产物α-Si_(3)N_(4)-AlN复合粉的抗水化性能比原料AlN粉的显著提高。α-silicon nitride-aluminum nitride(α-Si_(3)N_(4)-AlN)composite powders were successfully synthesized by the molten salt method,using silicon powder,melamine(C_(3)H_(6)N_(6))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(C_(3)H_(6)N_(6))∶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(1100,1150 and 1200℃)on the phase composition,the microstructure and the hydration resistance of the synthesizedα-Si_(3)N_(4)-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-Si_(3)N_(4)after firing at 1200℃ for 2 h.The hydration resistance of the α-Si_(3)N_(4)-AlN composite powder is significantly improved compared with that of the raw material AlN powder.

关 键 词：AlN粉体 熔盐法 α-Si_(3)N_(4)-AlN复合粉体 抗水化性能 

分 类 号：TQ175[化学工程—硅酸盐工业]