Structural characterization and calorimetric dissolution behavior of Na2OCuOP2O5 glasses
作者： Rachid Aït Mouss , Saida Krimi , Benoît Glorieux , Ismail Khattech , Michel Couzi
DOI: 10.1016/J.JNONCRYSOL.2016.08.029
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摘要: Abstract Two series of glasses belonging to the ternary system Na 2 O - CuO P 5 where copper is introduced differently were synthesized by conventional melt-quenching technique. Both start from meta-phosphate composition NaPO 3 (50Na O-50P ). In first series, O/P ratio constant (Na = 1) and both oxides replaced oxide CuO: (50- x /2) , 0 ≤ ≤ 40. second molar percentage kept at 50 mol% )Na – 50P ≤ 50. The these two belong respectively -CuO -Cu(PO ) lines system. These materials characterized density measurements, differential scanning calorimetry (DSC), X-ray diffraction (XRD), Raman, diffuse reflectance dissolution heat measurements carried out with micro-calorimetry Introduction in glass induces a blue/green color, strengthens vitreous network, as shown decrease volume (V M increase transition temperature (T g when content rises. crystallization glasses, followed XRD, leads formation CuP 7 or Cu(PO 4 depending on composition. Raman spectroscopy shows conservation metaphosphate chains for (O/P = 3) depolymerization varies 0 3.67. UV visible study showed that optical energy gap decreases increasing concentration. Calorimetric acid solution enthalpy, increases. phenomenon endothermic low (x
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