Al2O3-Si系原材料在氮气气氛下的高温物理化学变化过程  

High-Temperature Reaction Process of Al2O3- Si Materials in N2 Atmosphere

作　　者：祝洪喜[1] 邓承继[1] 李军营[1] 白晨[1] 张亚萍[1] 

机构地区：[1]武汉科技大学湖北省耐火材料与高温陶瓷重点实验室-省部共建国家重点实验室培育基地,湖北武汉430081

出　　处：《中国材料科技与设备》2007年第5期49-52,共4页Chinese Materials Science Technology & Equipment

基　　金：湖北省自然科学基金和武汉市科技攻关资助项目（200710421125）

摘　　要：以电熔刚玉和单质硅为原料压制成试样，分别在氮气气氛、1400—1600℃高温反应烧结，获得五个不同温度点合成的试样，采用XRD分析技术研究试样的物相演变过程，从而对Al2O3-Si原料在氮气气氛下反应过程中的物相变化和反应过程进行了研究。结果表明：在氮气气氛条件下，经高温反应，新产生的主要物相是β—Sialon和Si3N4。同时，新生成物相β—Sialon（Si6-ZAlZOZN8-Z，0〈Z〈4．2）中的Z值与温度和原料配比密切相关。Four groups of samples embedded in pure Nz atmosphere, whose starting materials was corundum and Silicon metal in the different ratio, fired at five temperatures of 1400℃, 1450℃, 1500℃-1550℃ and 1600℃, respectively. By the means of XRD analyzing technique, the phase compositions of the sintered samples have been detected, and the reaction meanchism of the above sintering processes was investigated. In the sintered samples embedded in Nz atmosphere, the phases of the samples were β-Sialon and Si3N4 besides corundum and Si which came from the start materials. The value of Z of the new phase β-Sialon（Si6-ZAlZOZN8-Z, 0〈Z〈4.2）in the sintering process was controlled by the synthsised temperature and the ratio of corundum and Si in the starting materials.

关 键 词：Al2O3-Si系材料 赛隆 氮化 反应过程 Z值 

分 类 号：TQ330.42[化学工程—橡胶工业]