摘要
镁铝氢氧化物正电溶胶结构研究韩书华,张春光,侯万国,孙德军,王果庭(山东大学胶体与界面化学研究所,济南,250100)关键词镁铝氢氧化物,正电溶胶,共沉淀镁铝氢氧化物是一种层状的氢氧化物。Burba等[1]提出将镁铝氢氧化物与钠质蒙脱土作用可得到抑制...
Using the coprecipitation method,magnesium aluminium hydroxide sol charged positive was prepared.The structure and composition were studied with powder XRD,TEM,TGA-DTA, FT-IR and chemical analysis.Results showed that the structure of magnesium aluminium hydroxide was hydrotalcite-like,and belonged to hexagonal system;lattice constants a and c both increased with the increase of the molar ratio of Mg/Al.The shape of magnesium aluminium hydroxide particles is hexagonal plate and the mean particle size is 11.7nm.Three peaks of obtained magnesium aluminium hydroxide caused by weight losses were detected:the first peak(around 160 ℃)might be attributed to physical adsorption water and interlayer water;the second one(around 258℃)was due to elimination of crystalline water and the third one(around 400℃)was due to the dehydroxylation of the mixed metal hydroxide layers.The first and the second weight loss peaks were superimposed and widen when the molar ratio of Mg/AI was above 2.84.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第11期1785-1787,共3页
Chemical Journal of Chinese Universities
基金
山东大学青年科学基金
关键词
镁铝氢氧化物
正电溶胶
共沉淀
Magnesium aluminium hydroxide,Positive sol,Coprecipitation