Effect of reducing sintering atmosphere on Ce-doped sol-gel silica glasses

被引：42

作者：

Fasoli, M. ^{[1
,2
]}

Vedda, A. ^{[1
,2
]}

Lauria, A. ^{[1
,2
]}

Moretti, F. ^{[1
,2
]}

Rizzelli, E. ^{[1
,2
]}

Chiodini, N. ^{[1
,2
]}

Meinardi, F. ^{[1
,2
]}

Nikl, M. ^{[3
]}

机构：

[1] Univ Milano Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy

[2] Univ Milano Bicocca, CNISM, I-20125 Milan, Italy

[3] ASCR, Inst Phys, Prague 16253, Czech Republic

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2009年 / 355卷 / 18-21期

关键词：

TEM/STEM; Luminescence; Optical spectroscopy; Raman spectroscopy; Silica; SPECTROSCOPIC PROPERTIES; OPTICAL-CENTERS; HIGH-EFFICIENCY; CERIUM;

D O I：

10.1016/j.jnoncrysol.2009.01.043

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 effect of sintering atmosphere on the optical and structural properties of Cerium doped sol-gel silica was investigated. Two sets of xerogels with Ce concentration from 0 to 10 mol% were prepared and densified in different conditions. The effect of a post-densification rapid thermal treatment was also considered. Optical absorption measurements evidenced that in oxidizing conditions Cerium is preferably incorporated inside the silica matrix as Ce4+ while the trivalent state is favoured by reducing conditions. Transmission electron microscopy images show rare-earth clusters formation whose nature was investigated by means of Raman, EDS and microdiffraction measurements. in order to evaluate the efficiency of the glasses as scintillating materials radio-luminescence measurements were carried out. A numerical fit of RL spectra showed the presence of two components peaking at 2.7 and 3.1 eV. After RTT, the relative intensity of the 3.1 eV component increases with Ce concentration. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1140 / 1144

页数：5

共 18 条

[1]

Blasse G., 1994, LUMINESCENT MAT, P1, DOI [10.1007/978-3-642-79017-1_1, DOI 10.1007/978-3-642-79017-1_1, 10.1007/978-3-642-79017-11, DOI 10.1007/978-3-642-79017-11]

[2] High-efficiency SiO2:Ce3+ glass scintillators [J].