高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (11): 1785.

• 研究简报 • 上一篇    下一篇

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   

  1. 山东大学胶体与界面化学研究所, 济南, 250100
  • 收稿日期:1996-01-15 出版日期:1996-11-24 发布日期:1996-11-24
  • 通讯作者: 韩书华,男,30岁,硕士,讲师.
  • 作者简介:韩书华,男,30岁,硕士,讲师.
  • 基金资助:

    山东大学青年科学基金

Studies on Structure of Magnesium Aluminium Hydroxide Positive Sol

HAN Shu-Hua, ZHANG Chun-Guang, HOU Wan-Guo, SUN De-Jun, WANG Guo-Ting   

  1. Institute of Colloid and Interface Chemistry, Shandong University, Jinan, 250100
  • Received:1996-01-15 Online:1996-11-24 Published:1996-11-24

关键词: 镁铝氢氧化物, 正电溶胶, 共沉淀

Abstract: 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-IRand 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.

Key words: Magnesium aluminium hydroxide, Positive sol, Coprecipitation

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