ASTM-B821 › Historical Revision Information
Standard Guide for Liquid Dispersion of Metal Powders and Related Compounds for Particle Size Analysis
Show Complete Document History
The following bibliographic material is provided to assist you with your purchasing decision:
1.1 This guide covers the dispersion in liquids of metal powders and related compounds for subsequent use in particle size analysis instruments. This guide describes a general procedure for achieving and determining dispersion; it also lists procedures that are currently in general use for certain materials.
1.2 This guide is limited to metal powders and related metal compounds. However, the general procedure described herein may be used, with caution as to its significance, for other particulate materials, such as ceramics, pigments, minerals, etc.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Significance and Use
4.1 The method of powder dispersion in a liquid has a significant effect on the results of a particle size distribution analysis. The analysis will show a too-coarse, unstable, or nonrepeatable distribution if the powder has not been dispersed adequately. It is therefore important that parties wishing to compare their analyses use the same dispersion technique.
4.2 This guide provides established powder dispersion techniques for certain materials and the means of deriving techniques for materials not listed. It should be used by all parties performing liquid-dispersed particle size analysis of all of the materials covered by this guide (see 1.1, 1.2, and 4.1).
4.3 This guide should be used in the preparation of powders for use in Test Methods B430, B761, and B822 and other procedures that analyze metal powder particle size distributions in liquid-dispersed systems.
liquid dispersion; metal powders; particle size analysis; powder metallurgy ;
To find similar documents by ASTM Volume:
02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)
To find similar documents by classification:
19.120 (Particle size analysis. Sieving Including test sieves and porosimetry)
This document comes with our free Notification Service, good for the life of the document.
This document is available in either Paper or PDF format.
2010 R16 EDITION
Oct. 1, 2016