碳酸锰真空热解法制备Mn3O4粉
本文研究了利用碳酸锰作为原料，在真空条件下制备四氧化三锰的制备工艺。采用TG-DSC分析研究了碳酸锰的热分解行为，利用X射线衍射(XRD)、扫描电镜（SEM）对制备得到的产物的晶粒、形貌进行分析。研究了不同工艺条件下（温度，焙烧时间，真空度）对产物的影响因素，获得最佳的焙烧工艺条件。研究结果表明：在本实验条件下焙烧时间、焙烧温度和真空度对生成的产物有较大的影响。在真空度为5kPa时焙烧温度降低了400℃，焙烧时间降低了0。5 h，反应的最佳条件为5kPa、400 ℃、2 h。
对碳酸锰真空法热解制备Mn3O4的研究，可为Mn3O4的生产提供基础数据和理论基础。
毕业论文关键词：碳酸锰；四氧化三锰；真空热解；制备
ABSTRACT Due to its unique physical and chemical properties, Mn3O4possessing a tetragonal spinel structure at room temperature are widely used in manganese zinc ferrite soft magnetic materials, lithium manganese acid anode materials and other fields。 At present,The current domestic production of Mn3O4 is mainly prepared by electrolysis in electrolytic manganese metal, but manganese metal is not natural raw materials, in the market price is also more expensive, which led to the higher cost of electrolytic metal manganese, economic benefits is not too good。In this paper, we study the grain morphology of using manganese carbonate as raw material under the vacuum condition of technique for preparing Mn3O4, analysis the grain and morphology of the product by X-ray diffraction (XRD), scanning electron microscopy (SEM)。 Study influencing factors of the product under different conditions (temperature, baking time, the degree of vacuum), get the best firing conditions。 The results showed that: in this experiment, the roasting time, roasting temperature and vacuum degree had a great influence on the product。 When the vacuum degree is 5kPa, the roasting temperature is reduced by 400 degrees, the roasting time is reduced by 0。5 h, the optimum conditions for the reaction are 5kPa, 400℃ 2 h。 Research can provide basic data and theoretical basis for the production of Mn3O4。
Keywords: manganese carbonate ; manganese tetroxide ; vacuum pyrolysis preparation
目录
第一章绪论 1
1。1 Mn3O4的性质和用途 1
1。1。1Mn3O4的性质 1
1。1。2 Mn3O4的用途 1
1。2 Mn3O4的制备工艺 2
1。2。1 高价锰氧化物法 2
1。2。2锰盐（Mn2+）法 3
1。2。3 金属锰法 4
1。2。4 Fe－Mn 合金法 6
1。3 Mn3O4生产技术的发展趋势 6
1。3。1 我国Mn3O4生产存在的问题 6
1。3。2应对措施 7
1。3。3应用前景 8
1。4 选题的研究意义和主要内容 9
1。4。1选题的研究意义 9
1。4。2研究的主要内容 10
第二章实验部分 11
2。1实验原料与设备 11
2。1。1实验原料 11
2。1。2实验仪器与设备 11
2。2碳酸锰差热-热重分析 11
2。3常压下不同加热温度MnCO3的热分解产物 11
2。4真空热解对热解产物的品质的影响 12
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