Synthesis and characterization of nanocrystalline CoAl2O4 spinel powder by low temperature combustion

被引：191

作者：

Li, WD ^{[1
]}

Li, JZ ^{[1
]}

Guo, JK ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2003年 / 23卷 / 13期

关键词：

CoAl2O4; colour; powders-chemical preparation; spinels;

D O I：

10.1016/S0955-2219(03)00081-5

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：

Single-phase nanocrystalline CoAl2O4 spinet powder with a high surface area has been directly prepared by an auto-ignited gel combustion process using citric acid as a reductant/fuel and metal nitrates as oxidants. The molar ratio of fuel to nitrates in the redox mixture and the subsequent calcination upon the burnt powder were found to have a significant influence on the characteristics of the as-synthesized CoAl2O4 crystallites. By controlling the CA/NO3- ratio and calcination temperature, homogeneous crystalline CoAl2O4 powders with different particle sizes from 9 to 110 nm have been obtained. Gel formation, combustion behavior, microstructures and properties of the powders were characterized using DTA/TGA, FT-IR, XRD, FESEM, TEM, BET and UV/vis/IR. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2289 / 2295

页数：7

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