LOW TEMPERATURE SYNTHESIS AND OPTICAL PROPERTIES OF (Cu, Cr, Fe)Al₂O₄ NANOCRYSTALLINE SPINEL MATERIALS.

YADAV, T. P.; SINGH, DEVINDER; MUKHOPADHYAY, N. K.; SHAZ, M. A.; TIWARI, R. S.; SRIVASTAVA, O. N.

In the present investigation, (Cu, Cr, Fe)Al2O4 spinel was synthesized from decagonal quasicrystalline precursor using mechanical milling followed by air annealing. The optimum annealing temperature and time were found to be 600°C and 60 h respectively. The evolution of the spinel structure started upon air annealing at 600°C from the B2 phase formed due to milling of quasicrystalline phase for 40 h. The relevant optical property of mechanically milled and air annealed samples prepared at different temperatures (400°C, 500°C and 600°C) were evaluated by photoluminescence technique. These studies suggested the presence of emission characteristics in blue region i.e. at 430 nm.

ORGANIC synthesis; LOW temperatures; OPTICAL properties of metals; NANOCRYSTALS; SPINEL; MECHANICAL alloying; ALUMINUM oxide; ANNEALING of metals; PHOTOLUMINESCENCE

International Journal of Nanoscience, 2011, Vol 10, Issue 4/5, p861

0219-581X

Academic Journal

10.1142/S0219581X11008496