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Luminescence in the LiF–MgF2 System Activated by Rare Earths

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Journal of Applied Spectroscopy Aims and scope

In recent years, several reports have appeared on luminescence in LiMgF3. Important applications have also been claimed. There is no record of LiMgF3 in the ICDD database. In light of the crystallographic studies on ABF3 compounds and especially the finding that LiMgF3 is not formed, the reports on the LiMgF3 based phosphors appear interesting. Our reinvestigation confirmed that LiMgF3 does not exist. It is quite likely that the interesting properties described in the literature for LiMgF3, in fact, belong to the frozen eutectic or two-phase system. All the same, the existence of eutectic was exploited to melt MgF2 at much lower temperature (735°C) than the melting point of MgF2 (1263°C). We prepared LiF–MgF2:Eu2+ and LiF–MgF2:Ce3+ by melting at 735°C. These materials exhibited properties similar to those of MgF2:Eu2+ and MgF2:Ce3+ phosphors, respectively. Thus, using the lower melting point of eutectic, it might be possible to prepare various MgF2 based phosphors at temperatures as low as 735°C, against the high melting point of 1263°C for MgF2.

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Authors and Affiliations

  1. Shri Ramdeobaba College of Engineering and Management, Katol Road, Nagpur, India

    V. S. Singh & P. D. Belsare

  2. Department of Physics, R. T. M. Nagpur University, Nagpur, India

    S. V. Moharil

Authors
  1. V. S. Singh
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  2. P. D. Belsare
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  3. S. V. Moharil
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Correspondence to V. S. Singh.

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Published in Zhurnal Prikladnoi Spektroskopii, Vol. 89, No. 1, pp. 30–34, January–February, 2022.

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Singh, V.S., Belsare, P.D. & Moharil, S.V. Luminescence in the LiF–MgF2 System Activated by Rare Earths. J Appl Spectrosc 89, 24–27 (2022). https://doi.org/10.1007/s10812-022-01320-w

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  • DOI: https://doi.org/10.1007/s10812-022-01320-w

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