Near-infrared luminescence of ferric oxide particles

被引：7
|
作者：
Jun Wang [1 ]
White, William B. [1 ]
Adair, James H. [1 ]
机构：
[1] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
来源：
MATERIALS LETTERS | 2006年 / 60卷 / 16期
基金：
美国国家科学基金会;
关键词：
ferric oxide; particle size effects; infrared luminescence;
D O I：
10.1016/j.matlet.2005.12.070
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A weak near-infrared luminescence has been observed for fine-particle Fe2O3 when excited by 1064 nm radiation from a Nd:YAG laser. There are three broad luminescence peaks at 7994, 7225 and 6686 cm(-1), with intensities about 10 times that of the Raman scattering. The relative intensities vary with particle morphology and with heat treatment. Overall band intensities increase by about a factor of 10 for Fe2O3 that has been heated to 500 degrees C and the decreases again for material that has been heated to 1000 degrees C. The emission was assigned to the T-4(1g) -> (6)A(1g) crystal field transition of octahedral Fe3+. A large Stokes shift is associated with these transitions. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：2013 / 2016
页数：4
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