Sol-gel combustion synthesis of Cr3+:Al2O3 nanometer powders

被引：0

作者：

Mi, Xiaoyun ^{[1
]}

Zhang, Xiyan ^{[1
]}

Lu, Liping ^{[1
]}

Bai, Zhaohui ^{[1
]}

Wang, Xiaochun ^{[1
]}

Liu, Quansheng ^{[1
]}

Wang, Nengli ^{[1
]}

Zhang, Lei ^{[1
]}

Liu, Jinghe ^{[1
]}

机构：

[1] School of Material Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China

来源：

Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society | 2009年 / 37卷 / 02期

关键词：

High resolution transmission electron microscopy - Thermogravimetric analysis - Calcination - Differential thermal analysis - Metal ions - X ray powder diffraction - Aluminum oxide - Powders - Alumina - Combustion synthesis - Luminescence - Sol-gel process;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Cr3+:Al2O3 nanometer powders were prepared by sol-gel combustion synthesis. The dry gel was fired at 500C to initiate combustion, and then Cr3+:Al2O3 powders were formed when the combustion ashes were calcined subsequently at different temperatures. Thermogravimetric-differential thermal analysis, X-ray diffraction (XRD) and transmission electron microscopy (TEM) were employed to characterize the dry gel and powders. The luminescent properties of the nanometer powders were measured. The effects of synthesis conditions on the dispersion and luminescent properties of nanometer powders were studied. The XRD and TEM results show that the formed Cr3+:Al2O3 powders are single phase oxide powders with α-Al2O3 structure. The particle sizes of powder calcined at 1000C for 1 h are about 20-35 nm and are well-dispersed. The addition of glycol in preparing sol can enhance the dispersion of the powder. Spectral analysis shows that the excitation peaks are located at 404 and 540 nm and emission peaks are located at 692 and 668 nm, respectively.

引用

页码：243 / 246