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亚微米碳酸锰的制备及形貌控制
作者:吕春玲 张景林  
单位:中北大学化工与环境学院 中北大学化工与环境学院 太原030051 太原030051 
关键词:碳酸锰  粒度  形貌控制  离子浓度  超声频率  反应温度  点接触反应法 
分类号:TB383.1
出版年,卷(期):页码:2007,35(3):377-380
DOI:
摘要:

用硫酸锰和碳酸氢铵点接触反应法制备了亚微米级碳酸锰(MnCO3),分析了MnCO3的粒度和形貌控制。用透射电镜和粒度分析仪表征了实验结果。结果表明:由反应离子浓度决定的溶液过饱和度是影响MnCO3粒度和形貌的关键因素,当离子浓度比[CO32-]/[Mn2+]在1~10范围内增大时,MnCO3粒度呈递减趋势;当[SO42-]/[Mn2+]在1~6范围内增大时,MnCO3的结晶速度减慢,而且晶型由不规则型向立方型过渡。另外,较高的超声频率和较低的反应温度都有利于生成超细MnCO3沉淀。实验中获得了400~500nm的立方型MnCO3颗粒。

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The drop-to-drop mixing method of manganese sulfate and ammonium acid carbonate was used to prepare manganese carbonate(MnCO3)particles.Particle size and shape controlling of MnCO3 was studied and discussed.Transmission electron micro-scope and particle size analyzer were used to characterize the experimental results.The results indicate that supersaturation degree depending on ion concentration is very important for controlling the shape and size of MnCO3.The particle size decreases with the increased ratio of[CO3 2-]/[SO4 2-]from 1 to 10.Crystal speed of MnCO3 slows with the increased ratio of[SO4 2-]/[Mn 2+]from 1 to 6,and the crystal line form changes from irregular to cubical.Otherwise,higher supersonic frequency and lower reaction temperature are favorable factors for superfine MnCO3 grains.Cubical MnCO3 grains from 400 to 500 nm were prepared.

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基金项目:
国家教育部高等学校博士学科点专项基金(20040110009)资助项目
作者简介:
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参考文献:

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