Luminescence and Raman study of α-Bi2O3 ceramics
Luminescence and Raman study of α-Bi2O3 ceramics
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DOI：
10.1016/j.matchemphys.2012.01.088
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发表时间：
2012-03-15
影响因子：
4.6
通讯作者：
Piqueras, J.
中科院分区：
文献类型：
--
作者：
Vila, M.;Diaz-Guerra, C.;Piqueras, J.
用扫描电子显微镜的阴极发光和共聚焦显微镜的光致发光研究了稳定的单斜晶型Bi2O_3的发光性质。这种氧化物的粉末在空气或氮气气氛中分别在500摄氏度和750摄氏度的温度下烧结。起始粉末和在500℃处理的样品的光谱显示在1.50 eV和1.95 eV处有发光带，在2.1 eV处有一个发光带，在氮气处理的样品中更明显。750℃烧结导致1.50 eV红外发射猝灭，并形成发射大于3 eV的宽带。此外，还研究了拉曼光谱随烧结过程的变化。(C)2012爱思唯尔B.V.保留所有权利。
Cathodoluminescence in the scanning electron microscope and photoluminescence in a confocal microscope have been used to investigate the luminescence properties of the stable monoclinic a-phase of Bi2O3. Powders of this oxide have been sintered at temperatures of 500 degrees C and 750 degrees C in air or in nitrogen atmospheres. Spectra of the starting powder and of the samples treated at 500 degrees C show luminescence bands at 1.50 eV and 1.95 eV as well as a band at 2.1 eV, more prominent in nitrogen treated samples. Sintering at 750 degrees C leads to quenching of the 1.50 eV infrared emission and the formation of a broad band with emission above 3 eV. The evolution of Raman bands with the sintering treatments has also been investigated. (C) 2012 Elsevier B.V. All rights reserved.