Abstract—
We have studied EPR spectra of MnO2-activated fluorozirconate and fluorohafnate glasses in order to determine the oxidation state and distribution of the manganese ions. The effect of activator concentration on the ratio of the percentage of free Mn4+ ions to that of ions in clusters in the glasses has been investigated for the first time. The results demonstrate that, at high activator concentrations, the manganese ions in the glasses are clustered, and only a small fraction of them are present as isolated ions. Reducing the manganese concentration leads to an increase in the percentage of free Mn4+ ions. Devitrification is accompanied by dissociation of the clusters and a transition of the ions to an isolated state.
Similar content being viewed by others
REFERENCES
Li, G., Tian, Y., Zhao, Y., and Lin, J., Recent progress in luminescence tuning of Ce3+ and Eu2+-activated phosphors for pc-WLEDs, Chem. Soc. Rev., 2015, vol. 44, pp. 8688–8713. https://doi.org/10.1039/C4CS00446A
Li, Y., Qi, S., Li, P., and Wang, Z., Research progress of Mn doped phosphors, RSC Adv., 2017, vol. 7, pp. 38 318–38 334. https://doi.org/10.1039/C7RA06026B
Xu, Y.K. and Adachi, S., Properties of Na2SiF6:Mn4+ and Na2GeF6:Mn4+ red phosphors synthesized by wet chemical etching, J. Appl. Phys., 2009, vol. 105, paper 013 525. https://doi.org/10.1063/1.3056375
Aseev, V.A., Kolobkova, E.V., Nekrasova, Ya.A., Nikonorov, N.V., and Rokhmin, A.S., Manganese luminescence in fluorophosphate glasses, Nauchno-Tekh. Vestn. Inform. Tekhnol., Mekh. Opt., 2012, no. 6 (82). pp. 36–39.
Brekhovskikh, M.N., Batygov, S.Kh., Solodovnikov, S.P., Moiseeva, L.V., Zhidkova, I.A., Denisov, G.L., and Fedorov, V.A., Optical properties and electron paramagnetic resonance of MnO2-doped fluorozirconate glasses, Inorg. Mater., 2018, vol. 54, no. 11, pp. 1157–1161.
Brekhovskikh, M.N., Batygov, S.Kh., Moiseeva, L.V., Demina, L.I., Zhidkova, I.A., Solodovnikov, S.P., and Fedorov, V.A., Optical properties of europium-activated hafnium fluoride-based glasses, Inorg. Mater., 2016, vol. 52, no. 10, pp. 1031–1034.
Brekhovskikh, M.N., Solodovnikov, S.P., Moiseeva, L.V., Zhidkova, I.A., and Fedorov, V.A., Eu2+ and Gd3+ distributions in fluorohafnate glasses studied by electron paramagnetic resonance, Inorg. Mater., 2018, vol. 54, no. 7, pp. 713–715.
Vazhenin, V.A., Potapov, A.P., Guseva, V.B., and Artemov, M.Yu., Paramagnetic resonance of Mn4+ and Mn2+ centers in lanthanum gallate single crystals, Phys. Solid State, 2010, vol. 52, no. 3, pp. 515–521.
Wertz, J.E. and Bolton, J.R., Electron Spin Resonance: Elementary Theory and Practical Applications, New York: McGraw-Hill, 1972. Translated under the title Teoriya i prakticheskie prilozheniya metoda EPR, Moscow: Mir, 1975, pp. 277–337.
Carrington, A. and McLachlan, A.D., Introduction to Magnetic Resonance with Applications to Chemistry and Chemical Physics, New York: Harper & Row, 1967. Translated under the title Magnitnyi rezonans i ego primenenie v khimii, Moscow: Mir, 1970, pp. 341–434.
Brekhovskikh, M.N., Batygov, S.Kh., Moiseeva, L.V., Egorysheva, A.V., and Fedorov, V.A., Crystallization behavior of hafnium fluoride-based fluorochloride glasses, Inorg. Mater., 2016, vol. 52, no. 1, pp. 63–67.
FUNDING
This work was supported by the Russian Science Foundation, project no. 18-13-00407.
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by O. Tsarev
Rights and permissions
About this article
Cite this article
Brekhovskikh, M.N., Solodovnikov, S.P., Moiseeva, L.V. et al. EPR Spectra and Distribution of Manganese Ions in Modified Fluorozirconate Glasses. Inorg Mater 55, 710–714 (2019). https://doi.org/10.1134/S0020168519070045
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0020168519070045