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 degrees C for I hour and at 1000 degrees 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 I hour at 900 degrees C. In the sample calcined for 3 hours at 1000 degrees C, the mean size of crystallite microdomains was reduced from 600 angstrom to 300, 250 and 160 angstrom 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.

Luminescence properties of neodymium-doped yttrium aluminium garnet obtained by the co-precipitation method combined with the mechanical process / Caponetti, E.; Saladino, M. L.; Martino, D. C.; Redone, L.; Enzo, Stefano; Russu, S.; Bettinelli, M.; Speghini, A.. - In: DIFFUSION AND DEFECT DATA, SOLID STATE DATA. PART B, SOLID STATE PHENOMENA. - ISSN 1012-0394. - 106:(2005), pp. 7-16. [10.4028/www.scientific.net/SSP.106.7]

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

ENZO, Stefano;
2005

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 degrees C for I hour and at 1000 degrees 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 I hour at 900 degrees C. In the sample calcined for 3 hours at 1000 degrees C, the mean size of crystallite microdomains was reduced from 600 angstrom to 300, 250 and 160 angstrom 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.
Luminescence properties of neodymium-doped yttrium aluminium garnet obtained by the co-precipitation method combined with the mechanical process / Caponetti, E.; Saladino, M. L.; Martino, D. C.; Redone, L.; Enzo, Stefano; Russu, S.; Bettinelli, M.; Speghini, A.. - In: DIFFUSION AND DEFECT DATA, SOLID STATE DATA. PART B, SOLID STATE PHENOMENA. - ISSN 1012-0394. - 106:(2005), pp. 7-16. [10.4028/www.scientific.net/SSP.106.7]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11388/46663
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 18
social impact