The Preparation of Ultrafine Monodispersed Colloidal Particles of Rare Earth Compounds

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (7): 889.

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The Preparation of Ultrafine Monodispersed Colloidal Particles of Rare Earth Compounds

DENG Hong-Mei, XU Yan, KU Yih-Tong

Center of Analysis & Measurement, Depart.of Materials Science, Depart, of Chem., Fudan Univ., Shanghai, 200433

Received:1992-08-31 Revised:1992-12-05 Online:1993-07-24 Published:1993-07-24

Abstract

Abstract: Aseries of ultraf ine monodispersed colloidal particles of rare earth compounds were obtained by urea decomposition.The effects of various parameters, such as concentration, pH, aging temperature and time, and the nature of anions on the resulting precipitate particles were studied systematically.The optimal preparation conditions for the corresponding REparticles were concluded and discussed in detail.Powders obtained all had a relative large BETsurface area, which are more than 29 m²/g.

Key words: Ultrafine particles, Monodispersed colloidal particles, RE compounds, Urea decomposition method

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DENG Hong-Mei, XU Yan, KU Yih-Tong . The Preparation of Ultrafine Monodispersed Colloidal Particles of Rare Earth Compounds[J]. Chem. J. Chinese Universities, 1993, 14(7): 889.

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The Preparation of Ultrafine Monodispersed Colloidal Particles of Rare Earth Compounds

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