ChemInform Abstract: A New Precipitation Based Method for Preparation of Metasilicate Phosphors.

Abstract

A New Precipitation Based Method for Preparation of Metasilicate Phosphors.-Alkaline earth metasilicates MSiO3 (M: Ca, Sr, Ba, Mg) are precipitated from aqueous solutions of metal nitrates by slow addition of Na2SiO3 solution followed by annealing of the formed precipitate (air, 700°C, 1 h). Activation by various dopants like Bi 3+ , Sn 2+ , and Pb 2+ , as well as Ce 3+ , Eu 3+ , and Dy 3+ is also achieved. The resulting phosphors are characterized by photoluminescence spectroscopy. UV emission occurs for the new phosphors CaSiO3:Bi, MgSiO3:Bi, and MgSiO3:Pb. The preparation method will prove useful for the synthesis of metasilicates required for various applications. -(TALWAR*, G. J.; JOSHI, C. P.; MOHARIL, S. V.; DHOPTE, S. M.; MUTHAL, P. L.; KONDAWAR, V. K.; J. Alloys Compd. 509 (2011) 35, 8742-8747,