当前位置:首页 > 科研成果 > 学术论文学术论文

Research of high temperature crystalline structure and property evolution of spinel

信息来源:暂无 发布时间:2014-08-23

Yu, Y;Ruan, YZ;Wu, RP;Liu, S;Zeng, HR

Abstract

Magnesium aluminate spinel (MgAl2O4) with high purity has been prepared by using anodized waste slag from aluminum factory and (MgCO3)(4)Mg(OH)(2)center dot 5H(2)O as the main raw materials to discuss the change laws and characteristics of crystalline structure, microstructures and properties. X-ray diffraction (XRD) and scanning electron microscopy (SEM), together with relevant analysis software, were used to characterize the crystal phases and microstructures so as to get MgAl2O4. Results show that when increasing the holding time the amount of MgAl2O4 increases firstly and then keeps stable, but bulk density and bending strength increase firstly and then decrease. The best holding time is determined to be 3 h because at this time the corresponding MgAl2O4 3 content is up to 93%, bulk density 3.23 g center dot cm(-3), apparent porosity 4.6% and bending strength 122.4 MPa.

 

附件:Research of high temperature crystalline structure and property evolution of magnesium aluminate spinel