Photoluminescence spectra and crystallization of θ-Al2O3 and α-Al2O3 from AlOOH-Fe(NO3)3 gels

被引：26

作者：

Kákos, J

Baca, L

Veis, P

Pach, L

机构：

[1] Slovak Univ Technol Bratislava, Fac Chem Technol, Dept Ceram Glass & Cement, Bratislava 81237, Slovakia

[2] Comenius Univ, Fac Math & Phys, Dept Plasma Phys, Bratislava 84215, Slovakia

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2001年 / 21卷 / 03期

关键词：

photoluminescence; sol-gel; boehmite; Al2O3; crystallization;

D O I：

10.1023/A:1011218216917

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：

Diphasic boehmite derived unseeded and seeded (by either alpha -Al2O3, alpha -Fe2O3, or Fe(NO3)(3)) alumina gel planar monoliths were examined by DTA, XRD and photoluminescence spectroscopy. Luminescence spectra enable sensitive monitoring of the theta- and alpha -Al2O3 crystallization in heat-treated gels due to Cr3+ impurity traces. Fe(NO3)(3) unlike other seeds effectively influences crystallization of both theta- and alpha -Al2O3. The present results are interpreted as prevailing solution or Fe3+ ion effect on the crystallization process.

引用

页码：167 / 172

页数：6

共 21 条

[1] Excitation frequency dependence and fluorescence in the Raman spectra of Al2O3 [J].