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J. Cent. South Univ. (2016) 23: 1883-1889 DOI: 10.1007/s11771-016-3243-5 Conversion of coal gangue into alumina, tobermorite and TiO2-rich material LUO Jun(罗骏), LI Guang-hui(李光辉), JIANG Tao(姜涛... from the coal gangue, an integrated process is proposed. The process consists of three steps: 1) concentrating alumina from the coal gangue via activation roasting followed by alkali leaching of SiO2......
of 1173~1473 K in synthetic air for 100 h. The formation of the alumina layer approximately obeyed the parabolic rate law, with the exception of short initial stage. The parabolic rate constant values for the Zr-doped Fe3Al decreased at all tested temperatures. Fe3Al revealed massive spallation, whereas Fe3Al-Zr produced a fiat, adherent oxide layer. The microstructure investigations of the alumina......
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SURFACE TENSION OF MOLTEN IF STEEL CONTAINING Ti AND ITS INTERFACIAL PROPERTIES WITH SOLID ALUMINA K.Mukai1,L.C.Zhong2,M.Zeze3 (1.Department of Materials Science and Engineering, Faculty... Bureau, Nippon Steel Corporation,Kitakyushu 804-8501, Japan) Abstract:Surface tension of molten IF steel containing Ti and contact angle between the liquid steel and solid alumina were measured......
MECHANISM AND KINETICS OF TRANSFORMATION OF ALUMINA INCLUSIONS BY CALCIUM TREATMENT M. Lind1,L. Liu2,L. Holappa1,Z.J. Han2 (1.Laboratory of Metallurgy, Helsinki University of Technology, P.O. Box 6200,Espoo 02015, Finland;2.Central Iron and Steel Research Institute, Beijing 100081, China) Abstract:The basic mechanism and kinetics of the transformation process of alumina inclusions in steel......
Effect of Y2O3 and Sm2O3 on Sintering and Mechanical Behaviors of Alumina Ceramics YAO Yijun1,QIU Tai1,JIAO Baoxiang1 (1.College of Materials Science and Engineering, Nanjing University... results show that the sintering temperature can be decreased and the mechanical behavior can be improved by adding rare earth in alumina ceramics. The relative density of rare-earthdoped alumina......
FRACTURE MECHANISM pF THE HIGH ALUMINA ELECTRIC PORCELAIN李廷凯,杜海清摘 要:<正> The paper deals with the fracture mechanismof the high alumina electric porcelain.Thefracture origins,fracture process,fracturemorphology and acoustic emission properties arestudied by combining SEM with EDX and AE.The K1Cof alumina electric porcelain......
Mechanical behaviors of alumina ceramics doped with rare-earth oxidesYAO Yijuna,LI Chunchenga,b,WANG Linga,JIANG Xiaolonga,and QIU Taib a School of Mathematics and Physics,Nanjing University...">The effects of three types of additives Y2O3,La2O3,and Sm2O3 on the sintering and mechanical behaviors of alumina ceramics were investigated.The bending strengths of alumina ceramics with Sm2O3......
Electron-beam-induced Surface Reconstructing in Vermicular Alumina熊焰,LIU Wei,WANG LingCollaborative Innovation Center for Green Light-weight Materials and Processing, Hubei Province Key Laboratory of Green Materials for Light Industry, Hubei University of Technology摘 要:The surface reconstructing of vermicular alpha-alumina exposed under electron-beam......
Direct spray pyrolysis of aluminum chloride solution for alumina preparationLü Guo-zhi(吕国志), ZHANG Ting-an(张廷安), WANG Long(王龙), MA Si-da(马思达), DOU Zhi-he(豆志河), LIU Yan(刘燕) (Key Laboratory... and pyrolysis parameters on Cl content in alumina were investigated, and the alumina products were characterized by XRD, SEM and ASAP. The experimental results indicate that the spray pyrolysis efficiency......
