有機溶媒中での炭化ケイ素ウイスカーの分散性

概要

論文の詳細を見る
As fundamental research to raise the strength and fracture toughness of ceramics, the dispersibility of SiC whiskers, W(A) , and carbon-coated SiC whiskers, W (AC), in eight organic solvents was evaluated by measuring the zeta potential and sedimentation velocity. Ethanol and 2-propanol were selected from these organic solvents, and the dispersibility was studied in detail. The electric charge of W(A) was positive in ethanol and negative in 2-propanol. On the other hand, the charge of W(AC) was negative in both solvents. The charge of their whiskers was a minimum (negative) by the addition of 0.001-0.002 g/l dispersant for W(A) and 0.0002-0.001 g/l for W(AC). The dispersibility of W(AC) was worse than that of W(A) in ethanol. The dispersibility of both SiC whiskers was improved by the addition of the dispersant to ethanol and 2-propanol. It was estimated that the dispersibility of W(A) and W(AC) was considerably affected by steric hindrance of the polymer used as a dispersant.
社団法人日本セラミックス協会の論文
1998-08-01