Glassy yttrium and aluminum borate powders (g-YAB) were synthesized by the polymeric precursor method (modified Pechini). We report here a detailed study of structural, spectroscopic, optical characterizations g-YAB powders, involving several complementary techniques: thermal analysis, X-ray powder diffraction, electron microscopy combined with IR, nuclear magnetic resonance, paramagnetic reson...

Eu3+-doped and undoped Ca8NaBi(PO4)6F2:xEu (x = 0.01–0.5) apatite phosphors have been synthesized at 900 °C by the modified Pechini process. Their structural morphological characteristics were determined XRD, TEM Raman spectroscopy. The structure of host matrix was refined Rietveld method: Ca8NaBi(PO4)6F2 crystallizes in hexagonal class, sp. gr. P63/m, a b 9.3980 (6) Å, c 6.9039 (9) Å γ 120°). ...

The present study is dedicated to the development of aluminum borate luminescent powders which appear as promising and more environmental-friendly than conventional phosphors. different steps powder synthesis, in particular precursors (inorganic organic) ratios calcination conditions, are adjusted by studying resulting optical features get a broader warmer white emission. As shown previous work...

Tm(3+), Er(3+), Tm(3+)/Er(3+), Tm(3+)/Er(3+)/Eu(3+) single, double and triple activator ion/ions doped nanocrystalline BaGd2O4 (BG) phosphors were prepared by a Pechini type sol-gel process. After annealing at 1300 °C, X-ray diffraction patterns confirmed their orthorhombic structure. Field-emission transmission electron microscope images of the BG sample indicated a nanoneedle-type morphology....