Preparation and Properties of MgAl2O4-CaAl12O19 High Temperature Composite
The utilization of lightweight refractories plays an important role in reducing the energy consumption of industrial furnaces.In this paper,MgAl2O4-CaAl12O19 high temperature composite was synthesized via solid-state reaction using magnesite,dolomite and industrial alumina as raw materials.The influences of raw materials and reaction temperature on phase compositions and microstructure of the composite were investigated by XRD and SEM,respectively.The parameters to prepare MgAl2O4-CaAl12O19 high temperature composite were optimized.The results show that the optimum reaction conditions for synthesizing MgAl2O4-CaAl12O19 composite is the CA6/MA weight ratio of 2∶3,and the reaction temperature of 1500℃ for 4h.The CaAl12O19 crystals showed laminated or plate-like structure,and the MgAl2O4 showed spherical morphology.The reaction temperature had little effect on the phase compositions of MA-CA6 composite in this experiment.The content of Al2O3 in the raw material affected the phase composition of MA-CA6 composite.With the increase of the CaAl12O19 amount,the bending strength of the composite decreased.
MgAl2O4-CaAl12O19 Lightweight refractories Magnesite Dolomite Solid state reaction
Wang Yonghong Liu Yan-gai Yang Tao Huang Zhaohui Fang Minghao
School of Materials Science and Technology,China University of Geosciences(Beijing),Beijing 100083,P.R.China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
617-620
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）