| || Lead Sulphide-Doped Silica Xerogel by Sol-gel Technique
Author : Jain, C.L. ;Sharma, S.K.;Singh, T.K.
Source : Defence Science Journal ; Vol:46(2) ; 1996 ; pp 105-107
Subject : 66 Chemical Technology
Keywords : Sol gel technique ;Silica xerogel;PbS doped silica xerogel
Abstract : In this paper, a chemical process based on using sol-gel technique for the preparation of microcrystalline PbS-doped silica xerogel is described. Compared with the absorption spectra of bulk PbS crystals, the absorption edges of microcrystalline PbS-containing material exhibit large blue shift, due to confinement of microfine PbS particles in silica matrix. Because of the non-linear properties, this xerogel finds use in photonics as a cut-off filter.