液相烧结氧化铝陶瓷的致密化机理  

Mechanism of Densification for Alumina Ceramic Prepared by Liquid Phase Sintering

作　　者：黄晓巍[1] 

机构地区：[1]福州大学材料科学与工程学院,福州350002

出　　处：《材料导报》2005年第F05期393-394,404,共3页Materials Reports

基　　金：福州大学人才基金资助项目（CL2003-14;XJY-0307）

摘　　要：以CaO-MgO-SiO2玻璃为烧结助剂，对液相烧结Al2O3陶瓷的致密化机理进行了研究。研究结果表明，烧结助剂可显著促进Al2O2陶瓷的致密化，其致密度随烧结助剂含量的增加而提高，液相烧结激活能为265kJ／mol，表明扩散控制为其致密化机理。Al2O3 ceramic is sintered isothermally in air with the addition of CaO-MgO-SiO2 glass. The densification mechanism of Al2O3 ceramic prepared by liquid phase sintering is investigated. It is found that CaO-MgO-SiO2 glass can greatly improve the densification of Al2 O3 ceramic. The relative density increases with the content of additive. The measured activation energy is 265 kJ/mol ,which suggests thatdiffusion be the controlling mechanism for the Al2O3 ceramic prepazred by liquid phase sintering,

关 键 词：液相烧结 AL2O3 致密化 激活能 

分 类 号：TQ174.758[化学工程—陶瓷工业] TF124.39[化学工程—硅酸盐工业]