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《Refractories》 2003-02
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Application of sedimentation theory in particle size analysis of fine powders and ultra-fine powders

Zhao Xuguang,Zhao Sanyin Materials Institute,South China University of Technology,Guangzhou 510640,China  
The influence of Brown movement of fine particles on the testing accuracy was discussed when sedimentation theory is applied to analyze the particle size distribution of powders.The measurable minimal critical particle sizes ( d min ) of some refractory material powders,which should be between 0.6~0.95 μm,are also deduced.The practical operating techniques and skills of a KCT-1 type homemade sedimentation balance as applied to analyze the particle size distribution of fine powders or ultra fine powders were also introduced.Finally,the abnormal phenomenon in testing process and the corresponding measures are elaborated.
【CateGory Index】: TQ175.66
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