An Introduction To The Physical Characterization （介绍物理特性）.pdf

An Introduction To The Physical Characterization of Materials by Mercury Intrusion Porosimetry with Emphasis On Reduction And Presentation of Experimental Data Paul A. Webb Micromeritics Instrument Corp. Norcross, Georgia January 2001 1 CONTENTS INTRODUCTION SECTION I. THEORY AND METHOD OF MEASUREMENT Introduction Fluid Dynamics and Capillary Hydrostatics Collecting Experimental Data Measurement Transducers SECTION II. OBTAINING INFORMATION ABOUT THE SAMPLE MATERIAL PART A. INFORMATION OBTAINED USING VOLUME AND MASS MEASUREMENTS ONLY Total Pore Volume Material Volume and Density Bulk and Envelope Volume and Density Skeletal and True Volume and Density Interstitial Void Volume Percent Porosity and Percent Porosity Filled PART B. INFORMATION OBTAINED BY APPLICATION OF WASHBURN ’S EQUATION Pore Volume Distribution by Pore Size Pore Area and Number of Pores PART C. INFORMATION OBTAINED BY APPLICATION OF SPECIAL OR MULTIPLE MODELS Particle Size Distribution Pore Cavity to Pore Throat Size Ratio The Distribution of Pore Cavity Sizes Associated With a Pore Throat Size Material Permeability and the Conductivity Formation Factor Pore Fractal Dimensions 2 INTRODUCTION Mercury intrusion porosimetry is one of only a few analytical techniques that permits an analyst to acquire data over such a broad dynamic range using a single theoretical model. Mercury porosimetry routinely is applied over a capillary diameter range from 0.003 µm to 360 µm— five orders of magnitude! This is equivalent to using the same tool to measure with accuracy and preci- sion the diameter of a grain of sand and the height of a 30-story building. Not only is mercury porosimetry applicable over a wide