Abstract
Three compounds in the system Al2O3-B2O3, viz. Al4B2O9, Al5BO9 and Al18B4O33 were successfully prepared by facile combustion synthesis. Activation by 3d transition element Cr3+ and 4f lanthanide Ce3+ was attempted. Characteristic luminescence in form of narrow R lines of Cr3+ was observed in Al5BO9 and Al18B4O33. Interaction of Cr3+ with the surrounding was represented by the Racah parameters. Broad band emission of Ce3+ arising from allowed d-f transitions in near ultraviolet (nUV) region in all 3 compounds is reported for the first time.
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