复合还原剂合成β-Sialon材料的研究  

Research on Synthesis of β-Sialon Material by Compound Reducing Agent

作　　者：郭艳芹[1] 李红霞[1] 

机构地区：[1]黄河科技学院工学院,郑州450063

出　　处：《硅酸盐通报》2014年第3期671-675,共5页Bulletin of the Chinese Ceramic Society

基　　金：河南省教育厅科学技术研究重点项目(12B430013)

摘　　要：选用低品位的铝土矿(Al2O3含量为68wt%)利用复合还原剂碳/硅、碳/铝、铝/硅还原氮化合成β-Sialon。计算试样烧成后的质量变化率,利用检测仪器XRD、SEM、EDS,化学分析法,研究了三种复合还原剂还原氮化低品位铝土矿合成β-Sialon的反应过程、显微结构和相对含量。结果表明:利用三种复合还原剂还原氮化合成β-Sialon材料的机理、生成β-Sialon的相对含量、结晶形貌、生产成本均不同;反应基本结束的温度均为1500℃,生成z值为3左右β-Sialon;工业生产中利用碳/硅复合还原氮化低品位铝土矿合成β-Sialon材料较理想。β-Sialon based on low grade bauxite （Al2O3 in 68wt% ） by using combined redu carbon/silicon, carbon/aluminum, aluminum/silicon was studied. Calculated mass change ction agents ratio of the specimens after firing, Examined Phase composition and microstructure of the specimens by using XRD, SEM and EDS, Examined the relative content by using chemical analysis. The results showed that the synthesis mechanism of three combined reduction agents specimens are different, the formation amount of β-Sialon are different, crystal morphology are not the same, the production costs are different, the end of the reaction temperature is 1500℃, the z of column β-Sialon is about 3, the ideal synthesizing β-Sialon based on low grade bauxite （Al2O3 in 68wt% ） in industrial production is by using carbon/silicon reduction agent.

关 键 词：低品位铝土矿 Β-SIALON 复合还原剂 还原氮化反应 

分 类 号：TQ175[化学工程—硅酸盐工业]