Preparation and up-conversion characterization of CaF sub(2):Yb super(3+), Ho super(3+)/BaF sub(2):Yb super(3+), Ho super(3+) co-doped glasses and glass-ceramics

Oxyfluoride tellurite glasses with compositions of TeO sub(2)-Al sub(2)O sub(3 )-CaF sub(2)/BaF sub(2) -NaF-YbF sub(3)- super(x)HoF sub(3) (x = 0.1, 0.3, 0.5, 1.0, 1.5, 2.0 mol%) were prepared by conventional melt-quenching method. Effect of heat-treatment schedules on crystallization behavior and m...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2015-08, Vol.640, p.311-316
Main Authors: Hou, Zhao-xia, Li, Hang-xin, Xue, Zhao-lu, Wang, Mei-han, Hu, Xiao-dan, Wang, Shao-hong
Format: Article
Language:English
Subjects:
Alloys
Diffraction
Emission analysis
Glass
Glass ceramics
Heat treatment
Schedules
Upconversion
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Oxyfluoride tellurite glasses with compositions of TeO sub(2)-Al sub(2)O sub(3 )-CaF sub(2)/BaF sub(2) -NaF-YbF sub(3)- super(x)HoF sub(3) (x = 0.1, 0.3, 0.5, 1.0, 1.5, 2.0 mol%) were prepared by conventional melt-quenching method. Effect of heat-treatment schedules on crystallization behavior and microstructure were analyzed by differential scanning caborimetry, X-ray diffraction, infrared spectra and scanning electron microscopy. Cubic CaF sub(2) and BaF sub(2) nano-crystal phases were formed by controlling heat-treatment schedules. Up-conversion emission properties and mechanism of Yb super(3+) and Ho super(3+) ions in glasses and glass-ceramics were investigated. The green and red up-conversion emissions were observed under 980 nm LD excitation. Up-conversion luminescence intensity in glasses was obvious higher than that in glass-ceramics. And there existed concentration quenching effect among Ho super(3+) ions resulted from cross-relaxation.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2015.03.237