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<p>In this study, we report the synthesis of cerium-doped gadolinium yttrium aluminum garnet powders with chemical formula Gd<sub>2.37</sub>Y<sub>0.6</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sub>0.03</sub> via the sol-gel method. The effect of annealing temperature on the stability of the garnet phase was thoroughly investigated. Various characterization techniques, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and photoluminescence spectroscopy (PL), were employed to assess these effects. XRD analysis demonstrated a marked improvement in the stability and crystallinity of the garnet phase with increasing annealing temperatures. FESEM images revealed the evolution of interconnected quasi-spherical particles, with a significant enlargement in average particle size correlating with higher annealing temperatures. PL spectra displayed a broad emission band attributable to Ce³⁺ transitions within the garnet matrix. Notably, the emission intensity exhibited a substantial enhancement with elevated annealing temperatures, which can be attributed to the increased crystallinity and a higher proportion of the garnet phase. These findings underscore the critical role of annealing temperature in optimizing the structural and luminescent properties of Gd<sub>2.37</sub>Y<sub>0.6</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sub>0.03</sub> nanopowders.</p> Graphical abstract <p></p>

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Controlled annealing for enhanced structural stability and luminescence of sol-gel synthesized Gd2.37Y0.6Al5O12: Ce0.03 nanopowders

  • 期刊论文

  • 发表日期：

    2025年2月20日

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  • Karima Hammoum,
  • Samir Hamrit,
  • Allaoua Boukerika,
  • Lydia Zaidi,
  • Youssef Larbah,
  • Djamel Eddine Kdib

摘要

In this study, we report the synthesis of cerium-doped gadolinium yttrium aluminum garnet powders with chemical formula Gd2.37Y0.6Al5O12:Ce0.03 via the sol-gel method. The effect of annealing temperature on the stability of the garnet phase was thoroughly investigated. Various characterization techniques, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and photoluminescence spectroscopy (PL), were employed to assess these effects. XRD analysis demonstrated a marked improvement in the stability and crystallinity of the garnet phase with increasing annealing temperatures. FESEM images revealed the evolution of interconnected quasi-spherical particles, with a significant enlargement in average particle size correlating with higher annealing temperatures. PL spectra displayed a broad emission band attributable to Ce³⁺ transitions within the garnet matrix. Notably, the emission intensity exhibited a substantial enhancement with elevated annealing temperatures, which can be attributed to the increased crystallinity and a higher proportion of the garnet phase. These findings underscore the critical role of annealing temperature in optimizing the structural and luminescent properties of Gd2.37Y0.6Al5O12:Ce0.03 nanopowders.

Graphical abstract