遠心式光透過法によるカオリン鉱物の粒度分布測定

概要

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In coating paper with kaolin mineral it is particularly important to pay attention to the distribution of its particle sizes. For measurement of particle sizes the sedimentation methods on Stokes' Law have hitherto been generally adopted. But since the measurement obtained by the gravitational sedimentation methods is relatively inaccurate when applied to kaolin particles below 2 micron in mean spherical diameter, the centrifugal is recommended for measurement of particles in so extremely fine range. The present investigation was conducted in order to check the existing centrifugal photo-extinction apparatus and the effect that this centrifugal photo-extinction method of measurement would have on the particle size distribution of kaolin mineral in respect of the reproducibility and the number of rotations of the sample cells. The comparative studied were made also of various effects that other methods of measurements would have. It may be said in conclusion that the centrifugal photo-extinction method is adequate for the determination of the particle size of kaolin mineral with considerable accuracy.
社団法人日本材料学会の論文
1969-06-15