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Title: Growth and optical properties of partially transparent Eu doped CaF{sub 2} ceramic

Partially transparent ceramic of 2 at.% Eu doped CaF{sub 2} have been grown preferentially towards [111] direction. For this purpose, Eu doped CaF{sub 2} nanoparticles (size∼12 nm) obtained by a low temperature solution growth method has been pressed at 1000°C under vacuum. The preferentially grown ceramic shows 15% transparency within the visible range of spectrum. As confirmed by the X-ray diffraction result, the hot pressed ceramic exhibits reduced lattice volume than the nanopowder. It indicates Eu{sup 3+} as the dominant substituting ions at the Ca{sup 2+} sites of CaF{sub 2} lattice in the hot pressed ceramic material. It is corroborated by the photoluminescence results of hot pressed ceramic which shows strong red emission corresponding to Eu{sup 3+} sites. However, photoluminescence of nanopowder exhibits intense peak in the blue region of the spectrum which is characteristics of Eu2+ sites.
Authors:
; ; ; ; ; ;  [1]
  1. Technical Physics Division, Bhabha Atomic Research Centre, Mumbai - 400085 (India)
Publication Date:
OSTI Identifier:
22269519
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; CALCIUM FLUORIDES; CALCIUM IONS; CERAMICS; CRYSTAL GROWTH; DOPED MATERIALS; EMISSION SPECTRA; EUROPIUM COMPOUNDS; EUROPIUM IONS; NANOSTRUCTURES; OPACITY; PHOTOLUMINESCENCE; POWDERS; X-RAY DIFFRACTION