NaCl稀溶液结晶的分形形态研究  

Study on fractal morphology of crystallization of NaCl dilute solution

作　　者：欧建文[1] 李淑红[2] 梁小平[3] 王辅忠[2] 李淑英[2] 

机构地区：[1]天津工业大学纺织学院,天津300160 [2]天津工业大学理学院,天津300160 [3]天津工业大学材料科学与工程学院,天津300160

出　　处：《物理实验》2010年第3期39-41,46,共4页Physics Experimentation

基　　金：天津工业大学大学生创新性实验计划项目资助

摘　　要：通过光学显微镜观察NaCl稀溶液在玻璃基底上快速蒸发结晶形成了完整的立方晶体、DLA凝聚体和形状复杂的凹凸状结晶3种形貌.对复杂的凹凸状结晶进行分析,认为不完整的NaCl小晶粒构成了一个个微小的生成元,以随机Koch曲线的生长方式自组织地顺次相互连接起来,指出此类结晶符合随机Koch曲线,是远离平衡态下的自组织现象.通过改变观测尺度求维数的方法,得到分形维数是1.15±0.06,与Koch曲线相近.The crystallization morphology of NaCl dilute solution which evaporated rapidly on glass substrate is observed by optical microscope. Three types of morphologies including complete cubic crystal, DLA aggregates and concave-convex crystallization in complex shapes are found. The a- nalysis of the concave-convex crystallization in complex shapes show that self-organized tiny generators formed by incomplete sodium chloride small crystals connected successively in a growth path of random Koch curve. And it＇s pointed that this kind of crystallization is in accordance with the random Koch curve, and it＇s a self-organization phenomenon far from equilibrium. Fractal dimension of 1.15±0.06 which is close to Koch curve, is obtained by means of changing the observing scale.

关 键 词：NaCl结晶 分形 KOCH曲线 分形维数 

分 类 号：O781[理学—晶体学]