Preparation of Porous Corundum/Mullite Ceramics by Sol-Gel Combined with Foaming Method

摘要：

　　With silica sol and alumina powders as raw materials,porous corundum/mullite ceramics were prepared by sol-gel reaction combined with mechanical foaming.The in-situ solidification of the foam slurry containing silica sol was realized through the addition of NH4Cl solution.The results show that the gelation time of ceramic slurry decreased with concentration increasing of NH4Cl.XRD results showed that the phase compositions of samples were corundum and mullite.Typical microstructures of porous ceramics were connected pores with cell-window structure.The compressive strength of the porous samples with 80% porosity was above 22MPa.

作者: CAO Hehui WANG Gang LI Hongxia YUAN Bo

作者单位: State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, China

会议类型: 国际会议

会议名称: The 6th International Symposium on Refractories (第六届国际耐火材料会议)

会议地点: 郑州

会议语种:英文

页码: 83-85

在线出版日期: 2012-10-18（万方平台首次上网日期，不代表论文的发表时间）