高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (8): 1292.

• 研究简报 • 上一篇    下一篇

氢氧化铝镁正电溶胶制备及性能研究

侯万国, 张春光, 孙德军, 梁晓丽, 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:1994-10-11 修回日期:1995-01-10 出版日期:1995-08-24 发布日期:1995-08-24
  • 通讯作者: 侯万国,男,31岁,硕士,副教授.
  • 作者简介:侯万国,男,31岁,硕士,副教授.
  • 基金资助:

    山东大学青年科学基金

Studies on Synthesis and Properties of Aluminium Magnesium Hydroxide Positive Sol

HOU Wan-Guo, ZHANG Chun-Guang, SUN De-Jun, LIANG Xiao-Li, WANG Guo-Ting   

  1. Institute of Colloid and Interface Chemistry, Shandong University, Jinan, 250100
  • Received:1994-10-11 Revised:1995-01-10 Online:1995-08-24 Published:1995-08-24

关键词: 混合金属氢氧化物, 溶胶, 超细颗粒

Abstract: A positive sol of aluminium magnesium hydroxide was synthesized by non-steady coprecipitation.The synthesis mechanism,shape,chemical composition, electrical property and thermal stability of colloidal particles were studied by X-ray diffraction, transmission electron microscope,chemical analysis,spectroanalysis and measuring of electrophoretic mobilities.The colloidal particles are tiny platelets with an average diameter of about 30 nm,and may aggregate with"oxygen-bridge"in water medium.In the process of synthesis,the peptization is the transformation process from amorphous to crystalline.The chemical compositions of particles are dependent on the composition of raw material.When the ratios of Mg/Al in raw material are 1:2,1:1 and 2:1,the chemical formulas of colloidal particles are Mg0.27Al(OH)3.07Cl0.47·0. 86H2O,Mg0.43Al(OH)3.72Cl0.14·0.5H2O, Mg0.96Al(OH)4.50Cl0.42·1.45H2O,respectively.The electrophoretic mobilities and thermal stability of the colloidal particles increase with increasing the content of magnesium in chemical composition of the particles.

Key words: Mixed metal hydroxide, Sol, Ultrafine particle

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