りん状黒鉛の表面性状に与える粉砕助剤の効果

概要

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Dry grinding of raw flaky graphite was carried out using a planetary mill in the presence of additives such as tri-sec-butylauminate, 1H, 1H, 5H-octafluoropentanol and 1-pentanol. Each of the additives proved effective in accelerating the size reduction of the graphite, along with in making thin platy particles. The agglomeration of powders and the ball coating were not observed during the grinding, indicating that the additives spread over on all surfaces including the newly born surface of the particles resulting in a decrease in surface energy. Fluoropentanol having a high acidity showed a relatively higher effectiveness of grinding aids than 1-pentanol. The function of the aids for thinning particles has been explained;i. e., the chemisorption of the additive molecules on the broken bond plane of the graphite probably facilitates the fracture of particles along the cleavage planes.
社団法人日本セラミックス協会の論文
1996-03-01