The effect of composition variables on precursor degradation and their consequence on Nb2O5 film properties prepared by the Pecchini method

被引：21
|
作者：
Rosario, Adriane V. [1 ]
Pereira, Ernesto C. [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Quim, Lab Interdisciplinar Electroquim & Ceram, Ctr Desenvolvimento Mat Ceram, BR-13560970 Sao Carlos, SP, Brazil
来源：
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2006年 / 38卷 / 03期
基金：
巴西圣保罗研究基金会;
关键词：
electrochromic films; Nb2O5; Pecchini method;
D O I：
10.1007/s10971-006-7997-3
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The calcination of Nb2O5 prepared by the Pecchini method was investigated using thermal analysis. The polymer precursor was prepared with different citric acid/ethylene glycol (CA/EG) and citric acid/niobium precursor (CA/Nb) molar ratios. The results suggest a strong influence of the CA/EG molar ratio, mainly on the polymerization degree. The CA/Nb ratio also modifies the degradation process of the precursor solution. The effect of the precursor compositional variation was also observed in the oxide structure, as well as in its electrochemical and electrochromic behavior. Films prepared using high CA/EG and a Nb salt precursor amount have the highest values of charge density and coloration efficiency. Moreover XRD data for this sample show a crystalline structure while the samples prepared with low CA/EG ratio are amorphous.
引用
收藏
页码：233 / 240
页数：8
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