粉体粒度分布分形维数与流动性及硬脂酸镁改进流动性关系  

Correlation of Powders' Particle Size Distribution Fractal with Flowability and Flow Addition Reagent Magnesium Stearate

作　　者：胡大为[1] 胡小芳[1] 林丽莹[1] 

机构地区：[1]华南理工大学工业装备与控制工程学院

出　　处：《中国粉体技术》2007年第4期1-4,共4页China Powder Science and Technology

基　　金：广东省工业攻关基金项目;编号:2005B10301051。

摘　　要：粉体的粒度分布与粉体流动特性密切相关,粉体粒度分布分形维数可以很好地表征粉体的粒度分布情况。本文中在颗粒流动性测试时引入粒度分布分形维数,通过采用利用颗粒几何特征、便于采用数字显微和图像处理计算粉体粒度分布分形维数值的数学模型,得到粉体粒度分布分形维数值,探讨颗粒流动性表征参数与粉体粒度分布分形维数值间的关系;并就流动助剂硬脂酸镁对粉体流动性能的改进与粉体粒度分布分形维数值关系进行了初步探讨。结果表明:粉体粒度分布分形维数值可以用于表征粉体流动性能,粉体粒度分形维数值可作为指导掺杂流动助剂量的参数。There is a consanguineous relationship between powders＇ particle size distribution and their flowability, particle size distribution fractal dimension （PSDF） could denote the particle size distribution excellently. The particle size distribution fractal was introduced into powders＇ flowability testing, through used the mathematical model which utilize the geometry properties of the particle, and propitious to the digital micrographic image analysis method. It was gained the fractal dimensions, discussed the relationship between the powders＇ flowability denotation parameters and powders＇ PSDF, and also made a primary research about the action effect of flow addition reagent magnesium stearate. The results show that the PSDF can denote the fluidity of the powder, and guide the adulteration of the flow addition reagent too.

关 键 词：粉体 粒度分布 分形维数 流动性 

分 类 号：O189.12[理学—数学]