研究了低浓度（0.01～0.20mol/L）N2H4.H2O条件下ZnO微晶的低温水热结晶特性。N2H4.H2O弱碱性和N2H5＋吸附配位性影响ZnO微晶的形核和各晶面的生长速率。随着N2H4.H2O浓度的提高,ZnO微晶分别呈板条状、六角片状和六角棒束状。碱性分散剂和超声的分散作用影响主要在成核阶段;受分散剂弱碱性的影响,0.20mol/L N2H4.H2O显现出强的还原性,N2气泡模板生长机制使所制ZnO微晶呈六角管状晶须束。
ZnO microcrystal growth was investigated under a low temperature hydrothermal process with a relatively low concentration of N2H4·H2O（0.01-0.20mol/L）.The nucleation and the growth rates of various crystal planes are strongly affected by the weak alkalinity of N2H4·H2O and the co-ordinative activity of N2H＋5 ion.ZnO microcrystals change from oatmeal-like plate to hexagonal plate,and then to hexagonal rod-like cluster with increasing of N2H4·H2O concentrations,respectively.The nucleations of ZnO microcrystals are influenced by the alkaline dispersant and ultrasonic treatment.The solution of 0.20mol/L N2H4·H2O with the alkaline dispersant has a strong reducibility,which changes the mechanism of nucleation and growth of ZnO microcrystals.The center-hollow hexagonal rod-like ZnO clusters were obtained through the N2 bubble template-growth route.
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