ASTM-C721 › Historical Revision Information
Standard Test Method for Average Particle Size of Alumina and Silica Powders by Air Permeability (Withdrawn 2002)
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Scope
1.1 This test method covers the determination of the average particle size in micrometres of alumina and silica powders using an air permeability method. The test method is intended to apply to the testing of alumina and silica powders in the particle size range from 0.2 to 50 [mu]m.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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.
Keywords
air permeability; alumina; average particle diameter; particle size; quartz; sub-sieve sizer; Number Code 81.060.10 (Raw materials)
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15.02 (Glass; Ceramic Whitewares)
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Document Number
ASTM-C721-81(1997)e1
Revision Level
1981 R97(E1) EDITION
Status
Cancelled
Modification Type
Withdrawn
Publication Date
Oct. 1, 1997
Document Type
Test Method
Page Count
4 pages
Committee Number
C21.04