Nanofluorides

Synthesis of CaF2–YF3 nanopowders by coprecipitation from aqueos solutions

“…The heterovalent substitution mechanism for the formation of the aforementioned solid solutions (Fig. 2) can be described by the following equation: Nanofluorides are another rapidly developing area of the modern science [34][35][36][37][38][39], for nanofluorides are widely implemented as luminophores, catalysts, biomedical and electrochemical materials; the CaF 2 -YF 3 system has also become crucially important in this area, as well. Low-temperature and soft chemistry syntheses of nanofluorides (e.g, mechanochemical [40,41], sol-gel [24], solvothermal [42] methods and some other techniques [35]) are especially prominent because of their technological advantages.…”

“…2) can be described by the following equation: Nanofluorides are another rapidly developing area of the modern science [34][35][36][37][38][39], for nanofluorides are widely implemented as luminophores, catalysts, biomedical and electrochemical materials; the CaF 2 -YF 3 system has also become crucially important in this area, as well. Low-temperature and soft chemistry syntheses of nanofluorides (e.g, mechanochemical [40,41], sol-gel [24], solvothermal [42] methods and some other techniques [35]) are especially prominent because of their technological advantages. Recently, we have successfully used our coprecipitation from aqueous solutions methods for nanofluoride preparations [34,35,[43][44][45][46][47][48], including our systematic studies of phase formations in the BaF 2 -YF 3 [49], BaF 2 -BiF 3 [50], BaF 2 -ScF 3 [51], BaF 2 -CeF 3 [52], SrF 2 -YF 3 [53] and CaF 2 -HoF 3 [54] systems.…”

“…Low-temperature and soft chemistry syntheses of nanofluorides (e.g, mechanochemical [40,41], sol-gel [24], solvothermal [42] methods and some other techniques [35]) are especially prominent because of their technological advantages. Recently, we have successfully used our coprecipitation from aqueous solutions methods for nanofluoride preparations [34,35,[43][44][45][46][47][48], including our systematic studies of phase formations in the BaF 2 -YF 3 [49], BaF 2 -BiF 3 [50], BaF 2 -ScF 3 [51], BaF 2 -CeF 3 [52], SrF 2 -YF 3 [53] and CaF 2 -HoF 3 [54] systems. We have observed varieties of phase fields in the studied MF 2 -YF 3 and NaF-RF 3 systems, including non-equilibrium phases with wide areas of homogeneity; we have also observed the absence of the ordered phases that exist under higher temperature equilibrium conditions [4].…”

The solubility of sodium and potassium fluorides in strontium fluoride

“…Investigating the solubilities of sodium and potassium fluorides in strontium fluoride is of interest. Strontium fluoride is an important matrix for solid-state photonics, it is used in the form of melt grown single crystals [2][3][4][5], optical ceramics [6,7], and in nanotechnology processes [6][7][8][9][10][11][12][13][14][15]. In many synthetic processes, the ions of sodium and/or potassium are in the protocols [16].…”

Synthesis and enhancement of red UC luminescence properties of ordered hexagonal NaYF 4 :Yb 3+ /Er 3+ nanowire arrays

“…Recently, upconversion (UC) luminescent arrays selfassemblied by low-dimensional nanomaterial have attracted considerable attention due to their potential applications in flat-panel displays, optical storage, biolabels, solid-state lasers, and light-emitting diodes [1][2][3][4][5][6][7]. The UC luminescence efficiency can be enhanced if the nanoarrays are aligned with photoniccrystal microstructures, and the faceted end planes of well-shaped crystals serve as good laser-cavity mirrors [8].…”