Luminescence properties of neodymium-doped yttrium aluminium garnet obtained by the co-precipitation method combined with the mechanical process.

Maria Luisa Saladino, Eugenio Caponetti, Delia Francesca Chillura Martino, Speghini, Bettinelli, Stefano Enzo, Russu, Lucia Pedone

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18 Citazioni (Scopus)

Abstract

Nanopowders of yttrium aluminium garnet Y3Al5O12 (YAG) doped with neodymium ions were obtained by the co-precipitation method from the reaction of aluminium and yttrium nitrate and neodymium oxide with ammonia. After washing and drying the hydroxide precursors were calcined at 500, 700, 800 and 900 °C for 1 hour and at 1000 °C for 3 hours. This product was treated by ball milling in a zirconia vial for 0.5, 1.5 and 10 h in order to achieve smaller nanoparticles. The structure, microstructure, morphology and optical properties were investigated by means of diffractometric, microscopic and spectroscopic techniques. The course of the amorphous-to-crystalline transformation was complete after calcining the powder for 1 hour at 900 °C. In the sample calcined for 3 hours at 1000 °C, the mean size of crystallite microdomains was reduced from 600 Å to 300, 250 and 160 Å after 0.5, 1.5 and 10 h of mechanical treatment respectively. The treated product was found to be contaminated with ZrO2. This contamination, from the vial and hardened ZrO2 balls reaches ca. 30 wt % after 10 h of mechanical treatment but causes only a slight reduction of the neodymium luminescence life-time, thus maintaining significant applicative properties.
Lingua originaleEnglish
Titolo della pubblicazione ospiteDIFFUSION AND DEFECT DATA, SOLID STATE DATA. PART B, SOLID STATE PHENOMENA
Pagine7-16
Numero di pagine10
Stato di pubblicazionePublished - 2005

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • ???subjectarea.asjc.2500.2500???
  • Condensed Matter Physics

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