化学学报 ›› 1995, Vol. 53 ›› Issue (9): 867-870. 上一篇    下一篇

研究论文

超细均分散稀土化合物胶粒的生长动力学

邓红梅;徐燕;顾翼东   

  1. 复旦大学分析测试中心;复旦大学化学系
  • 发布日期:1995-09-15

Growth kinetics of ultrafine monodispersed colloidal particles

DENG HONGMEI;XU YAN;GU YIDONG   

  • Published:1995-09-15

研究了尿素体系中超细均分散碳酸钕/碱式碳酸钇胶粒形成时, 粒子的尺寸随,以并运用Nielsen的时间因子分析法(Chronomal Analysis)表征了两种胶粒的生长机理, 获得了相应的速率常数。实验表明, 两种胶粒的生长(<40min)主要遵循表面反应控制的一级多核层增长机理。时间的变化规律

关键词: 紫外分光光度法, 尿素, 胶粒, 碳酸钕, 碳酸钇, 生长动力学

The change in size of ultrafine monodispersed colloidal particles of basic yttrium carbonate and neodymium normal carbonate with time from solutions of their corresponding salts, respectively, were followed in the presence of urea. Nielsen's chronomal analysis were used to characterize the growth mechanism and to obtain rate constants. Growths of both particles are thought to be one-order polynuclear layer growth mechanism.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, UREA, MICELLAE (=MICELLE), NEODYMIUM CARBONATE, YTTRIUM CARBONATE

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