铝粉造孔制备多孔氧化铝陶瓷的研究  

Study on Preparation of Porous Alumina Ceramics by Aluminum Powders

作　　者：石棋 范羽宣 林铭 武敬君 SHI Qi;FAN Yuxuan;LIN Ming;WU Jingjun(School of Materials Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333403,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,景德镇333403

出　　处：《中国陶瓷》2020年第6期45-49,共5页China Ceramics

摘　　要：研究了成型压力与铝粉引入量对多孔氧化铝陶瓷气孔状态、烧成收缩率、抗弯强度的影响,通过SEM观察了多孔氧化铝陶瓷材料的微观结构。研究发现,铝粉的加入可有效制备多孔结构高铝陶瓷,并降低了高铝陶瓷材料的烧成收缩率。且随着成型压力增大,达到同一显气孔率所需的铝粉加入量会减少。结合样品的断面形貌分析认为:铝粉在陶瓷基体中造孔机理是铝粉爆炸造孔和氧化膨胀造孔这两种机制共同作用的结果。In this paper,the effects of forming pressure and aluminum powder content on porosity,sintering shrinkage and bending strength of porous alumina ceramics were studied.The microstructure of porous alumina ceramics was observed by SEM.It is found that the addition of aluminum powders can effectively prepare porous high alumina ceramics and reduce the sintering shrinkage of high alumina ceramics.With the increase of forming pressure,the amount of aluminum powder needed to reach the same porosity will be decreased.Combined with the analysis of the cross-section morphology of the samples,it is considered that the pore forming mechanism of aluminum powder in ceramic matrix is the result of the joint action of the explosive perforation and oxidation expansion pore-making.

关 键 词：铝粉 多孔氧化铝陶瓷 爆炸造孔 氧化膨胀造孔 

分 类 号：TQ174.758.11[化学工程—陶瓷工业]