Significance and Use
4.1 It is important to recognize that the results obtained by this method or any other method for particle size distribution utilizing different physical principles may disagree. The results are strongly influenced by the physical principles employed by each method of particle size analysis. The results of any particle sizing method should be used only in a relative sense, and should not be regarded as absolute when comparing results obtained by other methods.
4.2 Light scattering theory that is used for determination of particle size has been available for many years. Several manufacturers of testing equipment have units based on these principles. Although each type of testing equipment utilizes the same basic principles for light scattering as a function of particle size, different assumptions pertinent to applications of the theory and different models for converting light measurements to particle size may lead to different results for each instrument. Therefore, the use of this test method cannot guarantee directly comparable results from the various manufacturers' instruments.
4.3 Manufacturers and purchasers of alumina and quartz will find the method useful to determine particle size distributions for materials specifications, manufacturing control, and research and development.
1.1 This test method covers the determination of particle size distribution of alumina or quartz using laser light-scattering instrumentation in the range from 0.1 to 500 μm.
1.2 The procedure described in this test method may be applied to other nonplastic ceramic powders. It is at the discretion of the user to determine the method's applicability.
1.3 This test method applies to analysis using aqueous dispersions.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 Quartz has been classified by IARC as a Group I carcinogen. For specific hazard information in handling this material, see the supplier's Material Safety Data Sheet.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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