Strengthening Mullite Ceramic Materials by Gas Infiltration

作     者：ZHANG Qi WANG Gang WANG Qu YUAN Bo LI Hongxia ZHANG Qi;WANG Gang;WANG Qu;YUAN Bo;LI Hongxia

作者机构：State Key Laboratory of Advanced RefractoriesSinosteel Luoyang Institute of Refractories Research Co.Ltd.Luoyang471039China 

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

年 卷 期：2023年第32卷第2期

页      面：37-40页

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of ChinaKey Projects of Henan United Fund(NSFCNo.U1904217) 

主　　题：mullite whiskers ceramic materials gas infiltration high temperature performance 

摘      要：In order to improve the high-temperature performance of mullite ceramic materials,mullite ceramic bodies were placed in closed containers with AlF_(3)·3H_(2)O powder and kept at 1 600 ℃ for 6 ***_(3)·3H_(2)O reacts with O_(2) to produce gaseous compounds AlOF and F,which penetrate into the bodies,promote Al2O3 and SiO_(2) to form mullite whiskers,and strengthen the mullite ceramic *** results show that the mullite ceramics have enhanced hot strength,increased bulk density and declined apparent porosity by adding a certain amount of AlF_(3)·3H_(2)O in a closed *** the addition of AlF_(3)·3H_(2)O is 6%,the bulk density of the ceramic material reaches the maximum and the apparent porosity is the lowest;and when the addition of AlF_(3)·3H_(2)O is 8%,the hot strength of the material is the highest.