Thermodynamic Research on the Coating Process of Silica Nano Film on Titanate Particles Surface

Chem. J. Chinese Universities ›› 2001, Vol. 22 ›› Issue (9): 1543.

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Thermodynamic Research on the Coating Process of Silica Nano Film on Titanate Particles Surface

CUI Ai-Li¹, WANG Ting-Jie², JIN Yong², SUN Mu³

1. Department of Chemistry, Tsinghua University, Beijing 100084, China;
2. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
3. State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

Received:2000-08-02 Online:2001-09-24 Published:2001-09-24

Abstract

Abstract: The critical nucleation radius is 2.8 nm obtained from calculation with thermodynamic method. If the nucleus caused by fluctuation is less than 2.8 nm, the nucleus will not grow up. Though the thermodynamic analysis is semi ideal, it is effective. We find a solution system in which the nucleation does not take place uniformly, but does on the surfaces of different solid phases. It gives a feasibility theoretically for titanate being coated uniformly with silica nanofilm and a single phase of silica not being formed.

Key words: Titanium dioxide, Silicon dioxide, Thermodynamics, Coating

CLC Number:

O612.4

TrendMD:

CUI Ai-Li, WANG Ting-Jie, JIN Yong, SUN Mu . Thermodynamic Research on the Coating Process of Silica Nano Film on Titanate Particles Surface[J]. Chem. J. Chinese Universities, 2001, 22(9): 1543.

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Thermodynamic Research on the Coating Process of Silica Nano Film on Titanate Particles Surface

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