Effect of CaO Impurity on Mullite Formation from SiO_(2) Gel and Al_(2)O_(3) Powders

作     者：GENG Qiankun TIAN Xuekun WANG Hongsen SHEN Jiaxin OUYANG Deze ZHAO Fei LIU Xinhong GENG Qiankun;TIAN Xuekun;WANG Hongsen;SHEN Jiaxin;OUYANG Deze;ZHAO Fei;LIU Xinhong

作者机构：Henan Key Laboratory of High Temperature Functional CeramicsSchool of Material Science and EngineeringZhengzhou UniversityZhengzhou 450052China 

出 版 物：《China's Refractories》 (中国耐火材料（英文版）)

年 卷 期：2024年第33卷第1期

页      面：34-39页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：This work was financially supported by National Natural Science Foundation of China(Nos.52172031 and 51872266) 

主　　题：CaO mullite atmosphere temperature particle size 

摘      要：To broaden the application of SiO_(2) sol-bonded castables,using micro-or nano-Al_(2)O_(3) powder and SiO_(2) gel powder as the main raw materials,the effects of CaO impurity on the formation of mullite by the reaction of Al_(2)O_(3) and SiO_(2) at different temperatures(1350,1400,1500,and 1600℃)in different atmospheres(oxidation atmosphere and reduction atmosphere)were *** results show that in the oxidizing atmosphere,the introduction of CaO can promote the formation of *** the temperature increases from 1350℃to 1600℃,the amount of mullite formed gradually *** the reducing atmosphere,the introduction of CaO is not conducive to the formation of mullite,and the amount of mullite decreases with the increasing *** smaller the particle size of Al_(2)O_(3),the more easily it reacts with SiO_(2) gel powder to form mullite.