Abstract
A novel ceramic synthesis technique, microwave-induced combustion process was investigated for the production of Y 3Al 5O 12:Cr powders with improved physical and luminescence properties. This technique involves the reaction of aluminum nitrate (Al(NO 3) 3·9H 2O), yttrium nitrate hexahydrate (Y(NO 3) 3·6H 2O), chromium nitrate (Cr(NO 3) 3·6H 2O), and carbohydrazide (CO(N 2H 3) 2) at microwave-oven and the whole process took only 30 min. The powders of Y 3Al 5O 12:Cr were further investigated by X-ray diffractometer (XRD), infrared spectroscopy (IR), and photoluminescence excitation and emission spectra (PL). The results showed that the formation temperature of YAG phase is significant low, compared to solid-state reaction route of constituent oxides. For luminescence property, the emission intensity of YAG:Cr powders synthesized by microwave-induced combustion increases gradually with Cr amount.
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