碳酸钙在高温条件下的变化过程分析  

The Analysis For The Calcium Carbonate at High Temperatures

作　　者：曾小平[1] 吴冰[1] 江山[1] 邓雪蓉[1] 

机构地区：[1]华南理工大学分析测试中心,广东广州510640

出　　处：《广东化工》2010年第5期70-72,共3页Guangdong Chemical Industry

摘　　要：用热重分析仪对纯碳酸钙和含碳酸钙的有机物进行分析比较,并用红外光谱仪、拉曼光谱仪、X射线衍射仪等现代仪器设备对六种不同高温条件灼烧后的碳酸钙进行测试,分析其高温变化过程,找出其高温转变规律,为含碳酸钙的有机物定性定量分析奠定基础。结果表明,碳酸钙主要在600～820℃之间进行分解,并先从灼烧样品的底部开始分层转化,利用马弗炉去掉有机成份而不引起碳酸钙分解的燃烧温度须低于600℃。The characteristics of calcium carbonate burning at different high temperatures were studied by thermogravimetry（TG）and derivative thermogravimetry（DTG）, infrared spectrometer（FT-/R）, Raman spectrometer（FT-Raman）, X-Ray Powder Diffraction（XRD）in order to find out the high-temperature conversion law for the qualitative and quantitative analysis of organic matter containing calcium carbonate. Results showed that the calcium carbonate＇s decomposition temperature was at the temperatures from 600 ℃ to 820 ℃, the order of Decomposition was from the bottom layer of the burning sample to the middle and then to the surface.The burning temperature using muffle furnace to remove the organic components must be below 600 ℃.

关 键 词：碳酸钙 热重 红外光谱 拉曼光谱 X射线衍射 

分 类 号：TQ172[化学工程—水泥工业]