Preparation and sintering properties of zirconia-mullite-corundum composites using fly ash and zircon  

作　　者：马北越 厉英 崔绍刚 翟玉春 

机构地区：[1]School of Materials and Metallurgy,Northeastern University

出　　处：《Transactions of Nonferrous Metals Society of China》2010年第12期2331-2335,共5页中国有色金属学报（英文版）

基　　金：Project(N100302002)supported by the Fundamental Research Funds for the Central Universities,China;Project(20100471467)supported by the China Postdoctoral Science Foundation

摘　　要：Zirconia-mullite-corundum composites were successfully prepared from fly ash,zircon and alumina powder by a reaction sintering process.The phase and microstructure evolutions of the composite synthesized at desired temperatures of 1 400,1 500 and 1 600°C for 4 h were characterized by X-ray diffractometry and scanning electronic microscopy,respectively.The influences of sintering temperature on shrinkage ratio,apparent porosity and bulk density of the synthesized composite were investigated.The formation process of the composites was discussed in detail.The results show that the zirconia-mullite-corundum composites with good sintering properties can be prepared at 1 600°C for 4 h.Zirconia particles can be homogeneously distributed in mullite matrix,and the zirconia particles are around 5μm.The formation process of zirconia-mullite-corundum composites consists of decomposition of zircon and mullitization process.Zirconia-mullite-corundum composites were successfully prepared from fly ash,zircon and alumina powder by a reaction sintering process.The phase and microstructure evolutions of the composite synthesized at desired temperatures of 1 400,1 500 and 1 600°C for 4 h were characterized by X-ray diffractometry and scanning electronic microscopy,respectively.The influences of sintering temperature on shrinkage ratio,apparent porosity and bulk density of the synthesized composite were investigated.The formation process of the composites was discussed in detail.The results show that the zirconia-mullite-corundum composites with good sintering properties can be prepared at 1 600°C for 4 h.Zirconia particles can be homogeneously distributed in mullite matrix,and the zirconia particles are around 5μm.The formation process of zirconia-mullite-corundum composites consists of decomposition of zircon and mullitization process.

关 键 词：zirconia MULLITE sintering properties reaction sintering process fly ash ZIRCON 

分 类 号：TF124.5[冶金工程—粉末冶金]