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| DISCUSSION ON CRYSTALIZATION KINETICS OF NANO-ZnO SYNTHESIZED BY ONE-STEP METHOD |
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| DOI： |
| KeyWord:Nano-ZnO,Crystalization kinetics,Nucleation,Crystal growth |
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| Abstract: |
| In this paper,the problem of crystallization kinetics for nano-ZnO synthesized by one-step method in the views of phase transition force,nucleation,nucleation rate and crystal growth rate was discussed. Theoretical analysis and experimental results indicate that the influencing factors of crystal formation are mainly reaction temperature and original reaction concentration ratio.Both uniform nucleation and non-uniform nucleation are developed during the course of synthesizing of nano-ZnO.Approaches to expediting nucleation rate are temperature original reaction concentration and supersaturation ratio in the nucleation course.Whereas synthesizing conditions produce an effect on the crystal growth,meaning that raising temperature or increasing supersaturation ratio may inhibit the crystal growth,resulting in nano-ZnO powder with fine particle size plus narrow size distribution obtained accordingly. |
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