Determination of the solid solubility of SrAl2O4 in CaAl2O4 through crystal field-dependent Eu2+ signatures

被引：25

作者：

Ju, SH

Kim, SG

Choi, JC

Park, HL ^{[1
]}

Mho, SI

Kim, TW

机构：

[1] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

[2] Ajou Univ, Dept Chem, Suwon 442749, South Korea

[3] Kwangwoon Univ, Dept Phys, Seoul 139701, South Korea

来源：

MATERIALS RESEARCH BULLETIN | 1999年 / 34卷 / 12-13期

基金：

新加坡国家研究基金会;

关键词：

oxides; X-ray diffraction; luminescence;

D O I：

10.1016/S0025-5408(99)00201-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The solid solubility of the SrAl2O4-CaAl2O4 system was investigated. Both XRD patterns and cathodoluminescence from Eu2+ in the host lattices were utilized to investigate the solid solubility of SrAl2O4 in CaAl2O4. A single phase exists in the range x = 1 to x = 0.5 in Sr1-xCaxAl2O4 composition (i.e., the [CaAl2O4] phase exists as a single phase from CaAl2O4 to Sr0.5Ca0.5Al2O4). The luminescence band maximum of Eu2+ in [CaAl2O4] phase shifts from 433 nm (CaAl2O4:Eu2+) to 404 nm (Sr0.9Ca0.1Al2O4:Eu2+). The blue-shift behavior of Eu2+ emission can be explained in terms of Eu2+ experiencing the weakening of crystal field strength with the decreasing x value of Sr1-xCaxAl2O4:Eu2+ (0.01%). This phenomenon confirms that Blasse's prediction regarding the Eu2+ crystal field-dependent 4f(6)5d(1) energy level is applicable in oxide hosts. (C) 2000 Elsevier Science Ltd.

引用

页码：1905 / 1909

页数：5

共 10 条

[1] LUMINESCENCE OF INORGANIC SOLIDS - FROM ISOLATED CENTERS TO CONCENTRATED SYSTEMS [J].