N2H4·H2O水热体系ZnO微晶的结晶特性  

ZnO microcrystal growth in hydrothermal processing with N_2H_4·H_2O

作　　者：刘长友[1] 谷智[1] 王涛[1] 查钢强[1] 介万奇[1] 

机构地区：[1]西北工业大学材料学院,凝固技术国家重点实验室,陕西西安710072

出　　处：《功能材料》2011年第11期2092-2095,共4页Journal of Functional Materials

基　　金：国家自然科学基金973资助项目(2011CB6104);凝固技术国家重点实验室自主课题资助项目(74-QP-2011)

摘　　要：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.

关 键 词：氧化锌 水热合成 结晶习性 水合肼 

分 类 号：O611.62[理学—无机化学] O784[理学—化学]