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Title: Direct observation of Nd{sup 3+} and Tm{sup 3+} ion distributions in oxy-fluoride glass ceramics containing PbF{sub 2} nanocrystals

Nd{sup 3+} and Tm{sup 3+}, doped oxy-fluoride glasses and glass ceramics were prepared by conventional melt-quenching and subsequent heat-treatment, respectively. β-PbF{sub 2} nanocrystals with diameter 50 –100 nm formed in the glass matrix after heat treatment. The Stark splitting in absorption peaks, enhanced photoluminescence and prolonged lifetimes that β-PbF{sub 2} nanocrystal formation increased the luminescence of rare earth ions. Both Nd{sup 3+} and Tm{sup 3+} ions were incorporated into nanocrystals that were enriched in lead and fluorine, and deficient in oxygen. - Highlights: • EELS analysis for rare-earth ion distribution in oxy-fluoride glass ceramics • No significant changes in lifetimes of Nd{sup 3+}, while obvious change for Tm{sup 3+} • Direct evidence of Nd{sup 3+} and Tm{sup 3+} aggregation into fluoride nanocrystals.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [1] ;  [4] ;  [5] ;  [6]
  1. School of Resources and Environmental Engineering, Wuhan University of Technology, 122 Luoshi Road, Hongshan, Wuhan, Hubei 430070 (China)
  2. (China)
  3. (POSTECH), San 31, Hyoja-dong, Pohang, Gyeongbuk 790-784 (Korea, Republic of)
  4. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Hongshan, Wuhan, Hubei 430070 (China)
  5. Center for Information Materials, Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Pohang, Gyeongbuk 790-784 (Korea, Republic of)
  6. China Building Material Institute of Solar-Energy Application, Zhenjiang, Jiangsu 212009 (China)
Publication Date:
OSTI Identifier:
22403616
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 98; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; AFTER-HEAT; AGGLOMERATION; CERAMICS; DOPED MATERIALS; ELECTRONS; ENERGY-LOSS SPECTROSCOPY; FLUORINE; GLASS; HEAT TREATMENTS; LEAD FLUORIDES; LIFETIME; MATRIX MATERIALS; NANOSTRUCTURES; NEODYMIUM IONS; OXYFLUORIDES; PHOTOLUMINESCENCE; RARE EARTHS; THULIUM IONS