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| INFLUENCE OF PH ON HYDROTHERMAL NUCLEATION MECHANISM AND INTERFACE MODEL OF NANOMETER AlOOH |
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Received:April 08, 2011
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| DOI：10.3969/j.issn.1005-7854.2011.03.012 |
| KeyWord:nanometer； AlOOH; pH; nucleation mechanism; interface model |
| Author | Institution |
| HAO Bao-hong |
Department of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijng , China |
| JI Yan-jiao |
Department of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijng , China |
| LIU Qiang |
Department of Chemical Engineering, Tsinghua University, Beijing , China |
| FANG Ke-ming |
Department of Metallurgy, University of Science and Technology Beijing; Beijing , China |
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| Abstract: |
| This paper focuses on the analysis of topographical characteristics of hydrothermal products under different pH environments and explains the reason for its oriented growth in the hydrothermal process in terms of nucleation mechanism, interface model and growth principle. Furthermor, combining with partical growth regulation, this paper adoptss the minimal free energy principle to disclose the fundamental reasons that heterogenic topography occurs to AlOOH under different pH medium environmental systems. This paper also adopts the structural characteristics of AlOOH crystal to establish an AlOOH interface modeland illustrates that the environmental system influences the chemical bond chain of the crystal, thereby changes the nature of external topography. Thus, the paper obtains the conclusion that as pH medium changing, the growth interface model is different and further the growth mechanism is different as well. |
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