WANG Qihao¹,WANG Yulian¹,XUE Ming²,LIN Yongjin¹,ZHU Yibin¹,ZHANG Jun¹,LIU Jiayi¹, SHI Tianjiao¹,TIAN Yidi¹,LI Chuang¹,SU Desheng³,YUAN Zhigang¹

(1.School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China; 2.College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China; 3.Liaoning Province Ultra-high Power Graphite Electrode Material Professional Technology Innovation Center,Dandong 118000,China)

Abstract:Using magnesite as raw material,magnesium bicarbonate solution obtained by calcination,hydration and carbonation as the magnesium source and 1 mol/L sodium silicate pentahydrate solution as the silicon source,magnesium silicate was prepared by precipitation reaction.The effects of the mole ratio of magnesium to silicon,pH,reaction time,calcination time on the composition phase and specific surface area of magnesium silicate were studied by X-ray diffractometer (XRD)、scanning electron microscope (SEM)、automatic measurement of specific surface area method and Fourier transform infra-red (FTIR).The results show that when mole ratio of magnesium to silicon is 1∶1.5,the pH of the mixed solution is 10.0,reaction time is 65 min,no calcination,the irregular bulk and granular amorphous magnesium silicate with specific surface area of 167.3 m²/g is obtained.

Keywords:magnesite;magnesium bicarbonate solution;magnesium silicate;amorphous phase;specific surface area

中图分类号： TQ177.5                            文献标志码：A

文章编号：1008-5548(2022)05-0128-07

DOI:10.13732/j.issn.1008-5548.2022.05.015

收稿日期： 2022-03-01， 修回日期：2022-05-09，在线出版时间：2022-08-19 12:52。

基金项目：国家自然科学基金项目，编号：51804200；沈阳理工大学大学生创新创业训练计划项目，编号：202110144113。

第一作者简介：王琪浩(1997—)，男，硕士研究生，研究方向为材料制备。E-mail:wqh3945199452021@163.com。

通信作者简介：王余莲(1986—)，女，副教授，博士，主要研究方向为矿物材料制备及应用。E-mail:ylwang0908@163.com。