Authors : M. A. Kale(a), C. P.Joshi(b), S. V. Moharil(c)
Page Nos : 539-545
Description :
In the system of CaO-Al2O3, CaAl4O7, CaAl12O19 and CaAl2O4 are more commonly
studied. However, there is not much information available on the title compound
Ca3Al10O18. Here we report the synthesis and luminescence for this compound.
Ca3Al10O18 phosphorsactivated with various dopants were prepared by combustion
synthesis. X-ray diffraction patterns were recorded on Philips PANalytical X’pert Pro
diffractometer. PL characteristics were studied using a Hitachi F-4000
spectrofluorimeter, at room temperature, using 1.5 nm spectral slit width in the
range of 200–700 nm. XRD pattern of the prepared compound matched well with the
ICDD file 02-392. Characteristic luminescence of Pb2+, Ce3+, Eu2+ and Eu3+ was
observed in the as prepared phosphors. Luminescence of Pb2+, Ce3+ is in UV region of
the spectrum while that of Eu2+ in the blue. Weak emission of Eu3+ was
predominantly in the 5D0
7F2 transition which is in the red region (611 nm).
