摘要
以MgCl_(2)·6H_(2)O为原料、(NH_(4))_(2)CO_(3)为沉淀剂,采用液相沉淀法制备前驱体MgCO_(3)·3H_(2)O,并焙烧前驱体制备获得具有纤维结构的氧化镁。主要探讨沉淀剂浓度、反应温度、焙烧温度和焙烧时间对产物的平均粒径和物相组成的影响,并探究其形成机理。结果表明:沉淀剂浓度为1.5 mol/L、反应温度40℃、焙烧温度600℃、焙烧时间120 min时,可获得纳米中空棒状氧化镁,其表面由片状物相互连接形成多孔结构,前驱体三水碳酸镁在高温焙烧过程中起到模板作用。
The precursor MgCO_(3)·3H_(2)O was prepared by liquid phase precipitation using MgCl_(2)·6H_(2)O as raw material and(NH_(4))_(2)CO_(3)as precipitant,,and magnesium oxide with fiber structure was prepared by roasting the precursor.The effects of precipitant concentration,reaction temperature,roasting temperature and roasting time on the average particle size and phase composition of the product were mainly discussed,and the formation mechanism was explored.The results showed that when the concentration of precipitant was 1.5 mol/L,the reaction temperature was 40℃,the roasting temperature was 600℃,and the roasting time was 120 min,the nano−hollow rod−like magnesium oxide could be obtained,and the surface of which was connected by flakes to form a porous structure,and the precursor magnesium carbonate trihydrate played a template role in the high-temperature roasting process.
作者
关蕊
王余莲
宛天成
张一帆
李纪勋
邓凤
于雨
李克卿
苏峻樟
孙浩然
韩会丽
袁志刚
苏德生
赵连祥
GUAN Rui;WANG Yulian;WAN Tiancheng;ZHANG Yifan;LI Jixun;DENG Feng;YU Yu;LI Keqing;SUJunzhang;SUN Haoran;HAN Huili;YUAN Zhigang;SU Desheng;ZHAO Lianxiang(School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China;Liaoning Province Ultra high Power Graphite Electrode Material Professional Technology Innovation Center,Dandong 118100,China;Liaoning Dan Carbon Group Corporation Limited,Dandong 118100,China;The Military Representative Office of the Army Armament Department stationed in Shenyang stationed in Shenyang Region,Shenyang 110004,China)
出处
《矿产保护与利用》
2023年第3期145-151,共7页
Conservation and Utilization of Mineral Resources
基金
国家自然科学基金项目(52374271)
沈阳市科技局项目(22-322-3-03)
辽宁省重点研发计划-应用基础研究项目(2022JH2/101300111)
沈阳市中青年科技创新人才支持计划(RC220104)
辽宁省教育厅面上项目(LJKMZ20220588)
辽宁省大学生创新创业训练项目(S202210144002)。
关键词
三水碳酸镁
氧化镁
中空棒状
焙烧
模板
magnesium carbonate trihydrate
magnesium oxide
hollow rod−shaped
roasting
template
