Geodesic
Synthesis of NaYF$_4$:Yb, Er up-conversion luminophore from nitrate flux
Nanosistemy: fizika, himiâ, matematika, Tome 11 (2020) no. 4, pp. 417-423.

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The behavior of nanoparticle ensembles was studied using of NaRF4 hexagonal phases. The evolution of particles in the process of rapid and productive synthesis from flux as a result of a chemical reaction was investigated. A low-temperature synthesis process in the medium of sodium nitrate was used. Synthesis of the samples of up-conversion phosphor NaY$_{0.78}$Yb$_{0.2}$Er$_{0.02}$F$_{4}$ was performed from rare-earth nitrates at 350–430$^{\circ}$C for 15–500 min. NaF was used as the fluorinating agent. Powder X-ray phase analysis and scanning electron microscopy revealed a rapid transformation of the cubic alpha modification into a hexagonal phase, followed by the transformation of nanoparticles into hexagonal prisms of micron sizes. The up-conversion luminescence energy yield increased as the reaction time increased.
Keywords: sodium yttrium fluoride, fluorite crystal structure, gagarinite crystal structure, sodium nitrate.
Mots-clés : flux 
@article{NANO_2020_11_4_a5,
     author = {P. P. Fedorov and M. N. Mayakova and A. A. Alexandrov and V. V. Voronov and D. V. Pominova and E. V. Chernova and V. K. Ivanov},
     title = {Synthesis of {NaYF}$_4${:Yb,} {Er} up-conversion luminophore from nitrate flux},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {417--423},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2020_11_4_a5/}
}
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%A D. V. Pominova
%A E. V. Chernova
%A V. K. Ivanov
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P. P. Fedorov; M. N. Mayakova; A. A. Alexandrov; V. V. Voronov; D. V. Pominova; E. V. Chernova; V. K. Ivanov. Synthesis of NaYF$_4$:Yb, Er up-conversion luminophore from nitrate flux. Nanosistemy: fizika, himiâ, matematika, Tome 11 (2020) no. 4, pp. 417-423. http://geodesic.mathdoc.fr/item/NANO_2020_11_4_a5/