超细SiO_2的制备及水合特性实验分析  

Preparation and hydration of tiny silica

作　　者：吕绪良[1] 韩卫华[1] 李玉科[1] 王占峰[1] 邵锦萍[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2006年第2期145-147,共3页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：为了增加S iO2的功能以拓展它的应用范围,采用醇盐水解法制备S iO2粉末,并对其水合性能进行讨论。制备过程发现,氨水及正硅酸乙酯浓度都对S iO2的粒径及水合性能有所影响。采用酸洗和微波照射等方法对S iO2表面进行活化,使之产生更多的羟基。用红外光谱和水合等方法研究了S iO2的表面羟基含量,结果表明,酸洗和微波照射能够使S iO2表面活化,增强S iO2表面的水合性能。In order to increase the function of the silica to extend its application, the hydration of the silica powder obtained by the controlled hydrolysis of metal alkoxide was studied. The results indicated that the size and hydration of the silica were affected by the concentration of the ammonia and the tetraethoxysilane. More hydroxyls would be in the surface of silica after acid activation and microwave irradiation. The number of hydroxyls was determined by infra-red spectrogram, hydration, etc. As a result, acid activation and microwave irradiation could make the surface of the silica active and increase its hydration.

关 键 词：醇盐水解法 超细SiO2 表面活化 水合 

分 类 号：TF123[冶金工程—粉末冶金]