Preparation of Porous Mullite-corundum Ceramics with High Closed Porosities
Porous mullite-corundum ceramics with higher closed porosities were prepared by in-situ decomposition technology using Al(OH)3 and coal gangue as raw materials.After sintering at 1600℃ for 3 h,the phase composition,microstructure and room temperature properties of the samples were characterized by X-ray diffractometry(XRD)and scanning electron microscopy(SEM),and the formation of closed pores was explored.The study found that a thick layer of mullite ring is wrapped around the Al(OH)3 pseudomorph,which causes the nanopores produced by the in-situ decomposition of Al(OH)3 to become closed pores.The properties of the sample showed as high compress strength of 103.21 Mpa,bulk density of 1.98 g/cm3,apparent porosities of 24.3%,and high closed porosities of 16.1%.
porous ceramics closed porosities lightweight mullite-corundum aggregate
QI Jiangtao YAN Wen LI Yuanbing ZHOU Wenying WU guiyuan LI Nan
The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,PR China
国际会议
Conference on Refractories International 2018, CRI2018)(2018国际耐火材料学术会议)
杭州
英文
1-4
2018-10-17（万方平台首次上网日期，不代表论文的发表时间）