The crystallization of Gd2 3 -Al2O3 glasses |
| |
Authors: | Toetsu Shishido |
| |
Affiliation: | (1) The Oarai Branch, The Research Institute for Iron, Steel and Other Metals, Tohoku University, Oarai, 311-13 Ibaraki-ken, Japan |
| |
Abstract: | Glasses of Gd2O3 · x Al2O3 compositions where x represents 5/3, 4 and 6, were prepared using a rapid quenching apparatus and a laser beam. The crystallization process of the glasses was studied by means of differential thermal analysis (DTA), X-ray diffraction analysis and electron microscopy. The crystallizations of Gd2O3 · 5/3Al2O3, Gd2O3 · 4Al2O3 and Gd2O3 · 6Al2O3 are complex and exhibit one, two and three exothermic peaks in DTA measurement with increasing Al2O3 concentration, respectively. The crystallization process of Gd2O3 · 5/3Al2O3 glass involved the direct formation of the gadolinium aluminium garnet, 3Gd2O3 · 5l23 (GdAG), which is not obtained by the ordinary solid phase reaction. After crystallization of Gd2O3 · 4Al2O3 and Gd2O3 · l23 glass, both phases become a mixture of Gd2O3 · Al2O3 (perovskite type) and -Al2O3. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|