材料科学
分散剂
陶瓷
流变学
悬挂(拓扑)
色散(光学)
粘度
化学工程
复合材料
表面改性
吸附
产量(工程)
烧结
有机化学
工程类
物理
化学
光学
数学
纯数学
同伦
作者
Shuai Zhang,Na Sha,Zhe Zhao
标识
DOI:10.1016/j.jeurceramsoc.2016.12.013
摘要
Stereolithography of UV-curable ceramic suspensions can benefit from the preparation of stable, low viscosity and high solid loading ceramic suspensions without yield stress. Appropriately adding dispersants could optimize the rheological behavior to meet the requirements of stereolithography. In this work, short-chain dicarboxylic acids were utilized to modify the alumina particles and achieve well dispersed ceramic suspensions. The maximum adsorption capacities of dicarboxylic acids were determined by the method of High Performance Liquid Chromatography and the mechanism of surface modification and dispersion was also discussed. Dicarboxylic acids’ influence on the rheology behavior was systematically studied. When doses of dicarboxylic acids reach their maximum adsorption capacities, the alumina suspensions would achieve their lowest viscosities and yield stresses. 45 vol% alumina suspension with a viscosity ˂2 Pa s at shear rate 30 s−1 was successfully formulated. A sintering density of 96.5% can be achieved for the sebacic acid-modified alumina UV-curable suspension.
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