Preparation and luminescent properties of Cr3+:Al2O3 nano-powders by low-temperature combustion synthesis

Abstract: Cr3+:Al2O3 nano-powders were prepared through low-temperature combustion synthesis (LCS) method by using glucose as a dispersion agent for the first time. The Cr3+:Al2O3 nano-powders samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and luminescence spectrometer. XRD results showed that pure α-Al2O3 phase was obtained for the sample fired at 1100°C for 0.5h. TEM results indicated that nano-powders were well dispersed. Luminescence spectrum analysis results indicated that the excitation spectrum of Cr3+:Al2O3 nano-powders consisted of two bands peaking at 462nm and 579nm, respectively, and the emission spectrum consisted of two bands peaking at 692nm and 668nm, respectively. [Copyright &y& Elsevier]