在高温水蒸气气氛中碳化硅质耐火材料抗氧化性能研究  

Research on oxidation resistance of silicon carbide refractories in high temperature steam

作　　者：相宇博 王文武[1] 司瑶晨 曹会彦[1] 吴吉光[1] 万龙刚[1] 黄志刚[1] 王佳平[1] Xiang Yubo;Wang Wenwu;Si Yaochen;Cao Huiyan;Wu Jiguang;Wan Longgang;Huang Zhigang;Wang Jiaping(State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China;不详)

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》2020年第3期228-232,共5页Refractories

基　　金：洛阳市重大科技专项(1901001A)。

摘　　要：为了改善垃圾焚烧炉内衬材料,研究了Si3N4-SiC、Si2N2O-SiC、SiAlON-SiC 3种材料在1 000℃高温水蒸气气氛下,经过50、100、150、200、250和300 h不同时间热处理后的抗氧化性能。检测了氧化前后试样的显气孔率和体积密度,计算了试样氧化前后的质量变化率和体积变化率;采用XRD和SEM分析了试样氧化前后的物相组成和显微结构。结果表明:随着氧化时间的延长,碳化硅质耐火材料的体积膨胀和质量在不断增加;Si2N2O-SiC材料明显具有较小的质量增加率和体积膨胀量;Si2N2O-SiC材料具有更好的抗氧化性能,更适合作为垃圾焚烧炉的内衬材料。In order to improve the lining materials of waste incinerators,three kinds of refractories(Si 3N 4-SiC,Si 2N 2O-SiC,and SiAlON-SiC)were heat treated at 1000℃in steam atmosphere for 50,100,200,250,and 300 h,respectively,and the oxidation resistance was researched.The apparent porosity and the bulk density of the samples before and after oxidation,and the mass change rate and the volume expansion rate of the samples after oxidation were measured.The phase composition and the microstructure before and after oxidation were analyzed by XRD and SEM.The results indicate that with the prolongation of the oxidation time,the volume expansion and the mass of the silicon carbide refractories gradually increase;Si 2N 2O-SiC has the lower mass increase rate and volume expansion,and the better oxidation resistance,which is more suitable as the lining material for waste incinerators.

关 键 词：碳化硅质材料 高温水蒸气 抗氧化性 物理性能 显微结构 

分 类 号：TQ175[化学工程—硅酸盐工业]