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在前期天然纳米-微米FeS2晶须研究基础上,开展晶须微形貌观察研究.发现不同时期生长FeS2晶须的密集程度、直径、表面微形貌有明显差别,从早期到晚期晶须密集程度增加,直径减小,表面微形貌呈现出结瘤突出→表面粗糙→表面较光滑→表面平直、光洁的变化规律.根据晶体生长理论、晶须形成的地质背景和地质作用方式,分析讨论了耿庄FeS2晶须结晶生长时期生长界面稳定性及其变化过程.认为晶须生长早期有负温度梯度和过冷出现,晚期则是平稳的正温度梯度状态.晶须生长时期组分浓度经历了早期极不均匀,中期阶段相对均匀,晚期较均匀的变化过程.界面状态变化过程的总体趋势是由不稳定状态向稳定状态转变.耿庄FeS2晶须微形貌是热液体系中温度、组分浓度、界面相稳定性的协同作用结果.晶须微形貌不仅反映出晶须生长时期热液体系的物理、化学特点,而且对界面相的稳定性特征反映特别明显,记录了晶须生长界面的变化过程.
Based on the previous study of natural nanometer-micron FeS2 whiskers, the study of whisker micro-morphology was carried out, and the density, diameter and surface micro-morphology of FeS2 whiskers grown at different periods were obviously different from whiskers to whiskers The degree of increase, the diameter decreases, the surface micromorphology showed nodular salient → surface roughness → smooth surface → surface smooth, smooth changes.According to the crystal growth theory, the geological background of whisker formation and geological mode of action, analysis Discussed the growth interface stability and its changing process during the growth of Ganshuang FeS2 whiskers.It is considered that there is a negative temperature gradient and supercooling in the early stage of whisker growth and a steady positive temperature gradient in the late stage.The whisker growth period component concentration Experienced a very uneven early, mid-stage relatively uniform, late uniform changes in the process of the interface state of the overall trend is from unstable to stable state transition.Gengzhuang FeS2 whisker micro-morphology is the hydrothermal system temperature , Component concentration and interfacial phase stability.The whisker micro morphology not only reflects the physical and chemical characteristics of the hydrothermal system during whisker growth, And phase stability characteristics of the interface to reflect particularly evident, the process of change recorded whisker growth interface.