利用颗粒布朗运动获取超细粉体粒度信息的技术研究  

Researching the Technique for Drawing the Particle Size of Submicron Powder by Means of the Prticles' Brownian Movement

作　　者：陈卫[1] 何振江[1] 罗罡[1] 郭永彩[1] 谢莉莉[1] 吴开华[1] 杨冠玲[2] 

机构地区：[1]重庆大学光电精密机械研究所 [2]华南师范大学物理系

出　　处：《计量学报》1997年第2期156-160,共5页Acta Metrologica Sinica

基　　金：国家自然科学基金

摘　　要：对亚微米级超细粉体材料的粒径信息测量是目前亟待解决的技术难题。本文介绍了以朗之万的布朗运动模型理论为依据测量超细颗粒布朗运动与粒径关系的一种新方法。内容有：（１）快速连续采样的显微ＴＶ计算机系统；（２）多功能的超薄样品池；（３）布朗颗粒运动模糊图象的快速连续采样、处理、灰度重心提取、粒子跟踪处理；（４）一些布朗粒子在每个时刻的位置信息和运动轨迹。根据朗之万理论，探讨了超细颗粒布朗运动与粒径相关规律的实验验证问题。At present, it is a technology problem that is in need of immediate solve to measure and draw the particle's size information for submicron powder. This paper introduces a new method that measures Brownian movement track and particle's size of submicron particles according to Langevin's Brownian movement theory. This paper contains:(1) The microscope TV computer system for fast sampling in a row. (2) The super-thin cell possessing many functions. (3) Fast sample in a row, processing, picking up the center position of gray and tracing the particle's track for indistinct movement image of Brownian particles. (4) Position information and movement track of some Brownian particles at t i time. According to Langevin theory, analyzing experiment problem about the relationship between the displacement of Brownian Particles and its size.

关 键 词：超细颗粒 布朗运动 粒径 

分 类 号：O552.1[理学—热学与物质分子运动论]