zhpsЖурнал прикладной спектроскопииZhurnal Prikladnoii Spektroskopii0514-7506B. I. Stepanov Institute of Physics of the National Academy of Scienceszhps-966Research ArticleII. МОЛЕКУЛЯРНАЯ СПЕКТРОСКОПИЯMOLECULAR SPECTROSCOPYЛюминесценция систем LiF-MgF2, активированных редкоземельными элементами (англ.)Luminescence in the LiF-MgF2 System Activated by Rare Earths (In Engl.)SinghV. S.SinghV. S.

Нагпур

Nagpur

vartikasingh1710@gmail.comBelsareP. D.BelsareP. D.

Нагпур

Nagpur

MoharilS. V.MoharilS. V.

Нагпур, 440033

Nagpur

Колледж инженерии и менеджмента Шри РамдеобабыShri Ramdeobaba College of Engineering and ManagementУниверситет НагпураDepartment of Physics, R. T. M. Nagpur University2022020220228913034Copyright © Singh V.S., Belsare P.D., Moharil S.V., 20222022Singh V.S., Belsare P.D., Moharil S.V.Singh V.S., Belsare P.D., Moharil S.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://zhps.ejournal.by/jour/article/view/966

Подтверждено, что LiMgF3 не существует. Описанные в литературе свойства LiMgF3 относятся к замороженной эвтектике или двухфазной системе. Тем не менее существование эвтектики использовалось для плавления MgF2 при гораздо более низкой температуре (735°C), чем точка плавления (1263°C). Системы LiF-MgF2:Eu2+ и LiF-MgF2:Ce3+ получены с помощью плавления при 735°C. Эти материалы проявляли свойства, аналогичные свойствам люминофоров MgF2:Eu2+ и MgF2:Ce3+. Таким образом, используя более низкую температуру плавления эвтектики, можно получить различные люминофоры на основе MgF2 при температурах до 735°C по сравнению с высокой температурой плавления 1263°C для MgF2.

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 LiFMgF2: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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The authors declare that there are no conflicts of interest present.