Authors : N.S. Ugemuge,A. M. Muke, A.A.Dani, P.M. Adkine and S. V. Moharil
Page Nos : 204-207
Description :
Abstract:
In this paper recently synthesized fluoride Eu doped CaBaAlF7 reported first time. Synthesis of Fluorides like KMgF3:Eu, CaF2:Eu, CaSrF2:Eu and CaF2:Ce phosphors is possible by solid state metathesis. Fluorides have wide applications in optics as windows, lenses, scintillation crystals, and they are also used as host crystals for rare earth ions (Ho, Er, Eu, Nd, Ce) exhibiting interesting properties in optoelectronics such as lasing, light amplification, etc. These fluorides could be prepared in several minutes using domestic microwave oven. Though CaBaAlF7 is formed by metathesis, luminescence centers were not formed in one step; as-prepared samples did not show any luminescence. Samples reduced at 1000 C for 1 hour exhibited very intense, characteristic emission. Activator concentration, and in turn, the intensity of luminescence depends on the partition coefficient of the activator in the host and the washable reaction products (KCl in the present case).
Keywords: Solid state metathesis, luminescence.
