Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Regular Issue: Full papers
Influence of changes in crystal structures on the luminescent characteristics of GdF3:Tm3+ in a phase separation glass
Tetsuro JINTomoyo OCHIISHIYuri SHIBUYATetsuo YAZAWA
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2018 Volume 126 Issue 5 Pages 376-381

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Abstract

Hexagonal GdF3:Tm3+, which is thermodynamically unstable at room temperature, was successfully crystallized in borosilicate glass using a phase separation technique. The crystal structure of GdF3 was controlled by the addition of alkaline earth metals to the glass composition. Increasing the amount of SrF2 added to the glass composition to 1.65 mol % increased the amount of precipitation of hexagonal GdF3:Tm3+ crystals and the luminescence intensity. Lanthanide trifluoride phosphors were restrictively obtained in the borate phase as a result, and the emission of Tm3+ at 458 nm was observed. Furthermore, the luminescence intensity of GdF3:Tm3+ in the phase separation glass upon SrF2-doping was about three times larger than that without doping.

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© 2018 The Ceramic Society of Japan
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