Abstract
While preparing a terbium-containing phosphate glass, an intense emission of green light was observed when the melt was poured into a metal mould. This emission was easily visible to the naked eye and was only observed on quenching of the melts. To our knowledge this phenomenon, termed ‘cooling-induced luminescence (CIL)’, has not previously been reported. Experimental evidence suggests that the CIL may be related to a thermally induced shift in the oxidation-reduction balance in the melt. A similar phenomenon was also observed with europium phosphate melts.
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References
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Cronin, D., Blackburn, D. & Haller, W. Unusual luminescence behaviour of terbium phosphate glasses. Nature 295, 680–682 (1982). https://doi.org/10.1038/295680b0
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DOI: https://doi.org/10.1038/295680b0
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