石墨对β-SiAlON-SiC材料抗熔碱侵蚀性能的影响  

Influence of graphite on molten-alkali resistance forβ-SiAlON-SiC materials

作　　者：曹会彦[1] 张新华[1] 黄一飞 王文武[1] 吴吉光[1] 许海洋[1] Cao Huiyan;Zhang Xinhua;Huang Yifei;Wang Wenwu;Wu Jiguang;Xu Haiyang(State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China)

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

出　　处：《耐火材料》2021年第6期471-475,共5页Refractories

基　　金：国家科研专项项目(2009EG113040)。

摘　　要：以SiC颗粒及细粉、Si粉、AlN粉、α-Al_(2)O_(3)微粉、鳞片石墨等为原料制备了β-SiAlON-SiC材料。研究了石墨(粒度为45和300μm,加入质量分数分别为3.0%、5.5%、7.5%、10.0%)对其抗熔碱侵蚀性的影响。结果表明:添加7.5%(w)粒度为300μm的石墨的β-SiAlON-SiC试样抗熔碱侵蚀性能最佳,熔碱侵蚀后质量变化率最低,常温抗折强度保持率和高温抗折强度保持率最高。β-SiAlON-SiC composites were prepared using SiC particles and fines,silicon powder,AlN powder,α-Al_(2)O_(3) micropowder and flake graphite as starting materials.The influence of the graphite(particle size of 45 and 300μm,addition of 3.0%,5.5%,7.5%,and 10.0%,by mass)on the molten-alkali resistance was investigated.The results show that the molten-alkali resistance for theβ-SiAlON-SiC sample with 7.5%of graphite(300μm)is the optimal,showing the lowest mass change rate after corrosion,and the highest cold modulus of rupture and hot modulus of rupture retention ratio.

关 键 词：β-SiAlON-SiC材料 石墨 抗熔碱侵蚀性 物相组成 显微结构 

分 类 号：TQ175[化学工程—硅酸盐工业]