| 氢氧化镁分解动力学的研究 |
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| 引用本文： | 宁志强,翟玉春,孙立芹,顾惠敏,周镝,徐冬.氢氧化镁分解动力学的研究[J].分子科学学报,2009,25(1). |
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| 作者姓名： | 宁志强 翟玉春 孙立芹 顾惠敏 周镝 徐冬 |
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| 作者单位： | 东北大学材料与冶金学院,辽宁,沈阳,110004 |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 以硼泥为原料与硫酸反应制备出七水硫酸镁,以氢氧化钠为沉淀剂制备出符合标准HG/T 3607-2000的氢氧化镁.利用XRD,SEM和TEM对氢氧化镁进行了表征,DTA-TG对氢氧化镁的热分解动力学进行了研究.XRD结果表明:制备粉体为单一Mg(OH)2.SEM和TEM结果表明:样品为片状或针状纤维,片直径大小不一,在20～50 nm之间,针状纤维形状不规则,大小不一致,长度在20～100 nm之间.利用Kissinger法和Ozawa法计算出的氢氧化镁热分解反应活化能分别为135.14和141.61 kJ·mol-1.利用Coats-Redfern法和Dolye法判断氢氧化镁热分解反应机理函数为A1.5.
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| 关 键 词： | 硼泥 氢氧化镁 热分解 动力学 |
Study on the thermal decomposition kinetics of magnesium hydroxide |
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| NING Zhi-qiang,ZHAI Yu-chun,SUN Li-qin,GU Hui-min,ZHOU Di,XU Dong.Study on the thermal decomposition kinetics of magnesium hydroxide[J].Journal of Molecular Science,2009,25(1). |
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| Authors: | NING Zhi-qiang ZHAI Yu-chun SUN Li-qin GU Hui-min ZHOU Di XU Dong |
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| Institution: | School of Materials & Metallurgy;Northeastern University;Shenyang 110004;China |
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| Abstract: | Taken boron mud and sulfuric acid as raw materials,bitter salt was prepared.Taken sodium hydroxide as precipitation,magnesium hydroxide was prepared and its quality meets the standards of HG/T 3607-2000.XRD,SEM and TEM were used to characterize the sample,the thermal decomposition of magnesium hydroxide was studied by DTA-TG.It was confirmed that the prepared power is only magnesium hydroxide by XRD.The SEM and TEM results suggested that the sample is a mixture of sheet and acicular fibre,the diameter of sh... |
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| Keywords: | boron mud magnesium hydroxide thermal decomposition kinetics |
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