Processing of Aqueous Aluminum Nitride Suspensions with High Solid Loading
Processing of Aqueous Aluminum Nitride Suspensions with High Solid Loading
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DOI：
10.1111/j.1551-2916.2005.00467.x
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发表时间：
2005-09
影响因子：
3.9
通讯作者：
S. Wildhack;G. Rixecker;F. Aldinger
中科院分区：
文献类型：
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作者：
S. Wildhack;G. Rixecker;F. Aldinger
研究了不同添加剂对室温下AlN粉体在水悬浮液中水解的影响。结果表明，柠檬酸和聚丙烯酸是最有效的化学保护氮化铝对水解。受保护的粉末是亲水性的，这有利于水处理，并且当添加碱性分散剂时保持化学稳定性。基于这些结果，通过利用双峰粒度分布使水性浆料的固体负载最大化。将双峰粉末与分散剂Dolapix和柠檬酸组合，获得固体负载量超过50体积%的胶体稳定浆料。
The impact of different additives on the hydrolysis of AlN powder in aqueous suspensions at room temperature was studied. The results show that citric acid and polyacrylic acid are most effective in chemically protecting AlN against hydrolysis. The protected powder is hydrophilic, which facilitates aqueous processing, and the chemical stability is retained when basic dispersing agents are added. Based on these results, the solid loading of the aqueous slurries was maximized by utilizing bimodal particle size distributions. Combining bimodal powders with the dispersants Dolapix and citric acid, colloidally stable slurries with solid loadings in excess of 50 vol% were obtained.