Preparation of Light-Weight Alumina-Spinel Refractory by Foaming Process

摘要：

　　In order to reduce energy costs,light-weight alumina-spinel refractories with tri-modal pores were prepared by foaming process.The influence of foaming agent and magnesia on the properties of light-weight alumina-spinel refractory was investigated.The rheology of the original slurry and the density,mechanical properties and microstructure of samples were evaluated.The results showed that light-weight alumina-spinel refractory contained a highly interconnected network of spherical cells,consisting of the large-sized cells (larger than 40 μm),moderate-sized pores (averaging about 20 μm) and small-sized voids,which mainly attributed to the foaming agent and in-situ formation of spinel.The cold compressive strength of the samples varied within the range of 2-12 MPa,corresponding to densities of 0.8~1.2 g/cm3,and the thermal conductivity changed from 0.273 W/(m·K) to 0.315 W/(m·K) at 500 ℃.It was found that the density of the sintered samples was dependent both on the content of foaming agent and magnesia.With the help of magnesia,light-weight alumina-spinel refractories with good volume stability were prepared by foam method.

关键词： Light-weight Alumina-spinel Foaming Magnesia

作者: Xiaoxing Li Yuanbing Li Lei Zhao XU Yao Yawei Li Shujing Li Zhihui Fan Fang Liu

作者单位: The Key State Laboratory Breeding Base of Refractories and Ceramics,Wuhan University of Science and Guangzhou Iron and Steel Enterprises Group Co.Ltd.Guangzhou 510000,China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 1003-1008

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）