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目的:对炉甘石炮制前后的主要物相、化学成分、热稳定性进行研究。方法:通过X射线衍射(XRD)对炉甘石的物相进行分析,运用红外分光光度法(IR)和滴定法对炉甘石的化学成分进行分析,运用差热分析对炉甘石的热稳定性进行研究。结果:炉甘石经炮制后主要物相从单斜晶系的Zn5(CO3)2(OH)6转化成六方晶系的ZnO;碳酸根的伸缩振动及弯曲振动明显减弱;氧化锌的质量分数从63.36%增高到82.95%;样品升温至约250℃时放热,当接近315℃左右时热量不再变化。结论:炉甘石的炮制不仅使化学成分发生变化,而且物相也发生变化,差热分析可以规范炉甘石的明煅温度。
Objective: To study the main phase, chemical composition and thermal stability of calamine before and after processing. Methods: The phase of calamine was analyzed by X-ray diffraction (XRD). The chemical composition of calamine was analyzed by infrared spectrophotometry (IR) and titration. The thermal analysis of calamine Stability studies. Results: The main phases of calamine transformed from monoclinic Zn5 (CO3) 2 (OH) 6 to hexagonal ZnO. The stretching vibration and bending vibration of carbonate decreased obviously. The mass fraction of zinc oxide From 63.36% to 82.95%. When the sample is heated to about 250 ℃, it exotherms, and when the temperature approaches 315 ℃, the heat does not change any more. Conclusion: The processing of calamine not only changes the chemical composition, but also changes the phase. Differential thermal analysis can regulate the calcination temperature of calamine.