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化学学报
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化学学报 ›› 1994, Vol. 52 ›› Issue (1): 47-52. 上一篇    下一篇

研究论文

均匀Fe~3O~4胶体粒子形成机理II. 低温Mossbauer谱研究

姜继森;徐鸿志;陈龙武;杨燮龙;诸蕾;方允樟   

  1. 华东师范大学化学系;华东师范大学物理学系
  • 发布日期:1994-01-15

Mechanism of formation of uniform magnetite colloidal particles II. A sutyd of mossbauer spectroscopy at low temperature

JIANG JISHUN;XU HONGZHI;CHEN LONGWU;YANG XIELONG;ZHU LEI;FANG YUNZHANG   

  • Published:1994-01-15

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在液氮温度下, 测定了均匀Fe~3O~4胶体粒子制备过程中陈化时间为1小时内的不同时间所得样品的Mossbauer谱。结果表明, γ-FeOOH为Fe~3O~4均匀胶粒形成过程的中间产物, 并提出均匀Fe~3O~4胶粒的形成机理。

关键词: 氧化镁, 胶体, 穆斯堡尔谱法, 形成机理

During the preparation of uniform magnetite colloid particles, a series of samples aged for different times ?1 h were obtained by abruptly lowering the temperature The Moessbauer spectra of these samples were measured at liquid N temperature g-FeOOH was the intermediate product in the formation of uniform magnetite colloid particles. The mechanism of formation of magnetite colloid particles is: Fe2+ (OH-) ?Fe(OH)2 (NO3-, O2) ?g-FeOOH ?Fe3-aOr (ultrafine particles) (coagulation) ?Fe3-aO4 (uniform colloid particles) (Fe3+, Fe2+) ?Fe3O4 (uniform colloid particles).

Key words: MAGNESIUM OXIDE, COLLOID, MOSSBAUER SPECTROMETRY, FORMATION MECHANISM

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