冷冻干燥法制备的前驱体研究  

Study on the Precursor of Freeze Drying

作　　者：聂祚仁[1] 翟立力[1] 席晓丽[1] 童培云[1] 蒋亚宝[1] 

机构地区：[1]北京工业大学材料学院,北京100022

出　　处：《纳米科技》2006年第1期29-31,共3页

摘　　要：利用XRD、SEM研究了冷冻干燥法制备的前驱体。结果表明：冷冻干燥法制备的前驱体为表面光滑的无定性态。盐相沿晶界分布形成了片状形态，沿大单晶冰粒边界分布则形成了六边形态。当溶液浓度较高时，主要是片状前驱体；当溶液浓度较低时，则出现六边形态的前驱体。The precursor of freeze drying was investigated by means of X-ray diffraction and scanning electron microscopy. The results show that the precursor of freeze drying is amorphous with a smooth surface. The salt phase along grain boundary forms flaky structure, while the salt which distributed in the big single crystal boundary forms hexagon. When the concentration of the solution is high, the main precursor structure is flake and it appears hexagonal pattern when the concentration is low.

关 键 词：冷冻干燥 前驱体 晶化 偏析 

分 类 号：TG146.15[一般工业技术—材料科学与工程]