Effect of the Calcium Aluminate Cement Addition on the Performances of the Mullite Foam Ceramics

摘要：

　　Mullite foam ceramics were prepared by direct-foaming method using white clay and alumina as raw materials,and the calcium alumina cement(CA)as binding agent.Effect of the CA addition on the phase compositions,microstructures and properties of the foam ceramics were investigated through X-ray diffractometer(XRD)and scanning electron microscopy(SEM).The results showed that with the increasing of the CA addition from 0 wt%to 8 wt%,the viscosities of the initial slurries decreased,the porosities of the specimens improved,the thermal conductivities decreased,and the compressive strengths improved first and then decreased.The optimized product was a specimen with 4.0 wt%CA which had a high porosity of 80.8%,a low bulk density of 0.56 g/cm3 and a lower thermal conductivity 0.232 W/(mK)(800 ℃).

关键词： mullite foam ceramics thermal conductivity calcium alumina cement content

作者: ZHOU Wenying YAN Wen LI Nan LI Yuanbing

作者单位: The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China

会议类型: 国际会议

会议名称: Conference on Refractories International 2018, CRI2018)(2018国际耐火材料学术会议)

会议地点: 杭州

会议语种:英文

页码: 1-4

在线出版日期: 2018-10-17（万方平台首次上网日期，不代表论文的发表时间）