• 作者： Chou, Kan-Sen; Chen, Wen-Hou; Huang, Chung-Sing
• 中文摘要： 本文旨在探討使HMTA為沈澱劑以均勻沈澱水合氧化鋅微粒,實驗結果發現沈澱粒子之形態將取決於沈澱條件,其中尤以溶液之啟始pH值,反應溫度及是否添加酒精溶劑等參數影響最大,而沈澱粒子可能得到棒狀,針狀,球形或聚集體,然而若經過充份之老化,所有沈澱粒子皆將轉變為棒狀產物,此一沈澱程序之反應機構及HMTA所扮演之角色亦有所討論。
• 英文摘要： The homogeneous precipitation of hydrous zinc oxide colloids using hexamethylenetetramine (HMTA) as the precipitant was investigated. Depending upon the precipitation conditions, the precipitates can be made into various shapes such as rod, needle, globular or aggregates. It was found that the starting pH value, the reaction temperature and the addition of alcohol all have quite significant effects on particle morphology. However, after prolonged aging, all precipitates would transform into crystalline rod-shaped particles. The role of HMTA as well as the formation mechanism of these particles were also discussed.
• 中文關鍵字： 含水的二氧化鋅; 均勻沈澱; 膠體
• 英文關鍵字： Hydrous Zinc Oxide; Homogeneous Precipitation; Colloid