Abstract—
We have developed a technological scheme for the preparation of europium-activated gadolinium niobates and tantalates and related solid solutions by a sol–gel process. It has been shown that, during synthesis of crystalline powders, raising the calcination temperature from 1200 to 1400°C leads to a decrease in the concentration of impurity phases from 10–15 to 4–10 wt %. The GdxEu1 – xTaO4 samples have been shown to have different structural polytypes at these temperatures. The synthesized materials exhibit bright red luminescence under photoexcitation.
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ACKNOWLEDGMENTS
We are grateful to T.B. Popova for her assistance in performing the electron probe microanalysis work.
In this study, we used equipment at the Joint Research Center “Material science and characterization in advanced technology” with financial support by Ministry of Education and Science of the Russian Federation (id RFMEFI62119X0021).
Funding
The reported study was funded by RFBR according to the research project no. 19-33-50149.
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Gusev, G.A., Masloboeva, S.M., Kravets, V.A. et al. Preparation and Characterization of Gadolinium Niobate Tantalates Activated with Europium Ions. Inorg Mater 57, 383–391 (2021). https://doi.org/10.1134/S0020168521040063
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DOI: https://doi.org/10.1134/S0020168521040063