Paper Title:
Luminescence Properties of Neodymium-Doped Yttrium Aluminium Garnet Obtained by the Co-Precipitation Method Combined with the Mechanical Process
  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.

  Info
Periodical
Solid State Phenomena (Volume 106)
Edited by
Radu Robert Piticescu, Witold Lojkowski and John R. Blizzard
Pages
7-16
DOI
10.4028/www.scientific.net/SSP.106.7
Citation
E. Caponetti, M. L. Saladino, D. Chillura Martino, L. Pedone, S. Enzo, S. Russu, M. Bettinelli, A. Speghini, "Luminescence Properties of Neodymium-Doped Yttrium Aluminium Garnet Obtained by the Co-Precipitation Method Combined with the Mechanical Process", Solid State Phenomena, Vol. 106, pp. 7-16, 2005
Online since
September 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ali Shokuhfar, Bahman Nasiri-Tabrizi, Omid Gashti, Reza Ebrahimi-Kahrizsangi
Abstract:Mechanochemical process in polymeric vials has been carried out successfully to produce nanocrystalline hydroxyapatite (HAp) through two...
98
Authors: Taha Rostamzadeh, H. Shahverdi, R. Sarraf-Mamoory, A. Shanaghi
Abstract:Mechanical alloying is one of the most successful methods for the manufacturing of metal matrix nanocomposite powders. In this study, Al/SiC...
764
Authors: H. Kaffash, Ali Shokuhfar, Hamid Reza Rezaie, Ehsan Mostaed, Ali Mostaed
Abstract:Fabrication of alloys in the solid state via mechanical alloying (MA) process has been studied by earlier researchers. The effects of milling...
1262
Authors: H. Ramezanalizadeh, Saeed Heshmati-Manesh
Abstract:Molybdenum disiliside is known as a ceramic material with attractive properties for high temperature structural applications. In this study,...
1364
Authors: Duygu Ağaoğulları, Özge Balci, Ö. Utku Demirkan, Hasan Gökçe, Aziz Genç, M. Lütfi Öveçoğlu, Ismail Duman
Abstract:Due to improve the physical and mechanical properties of Ni activated W compacts, TiB2 was added to the W-Ni matrix as reinforcing...
194