In Russian

Abstract

A method of thermochemical synthesis of powders of yttrium-aluminum garnet doped with cerium (yellow phosphor) for polymer material filling with the purpose of optical composites creation has been developed. As initial ingredients for the synthesis of Y 2.95 Ce 0.05 Al 5 O 12 ; Y(NO 3 ) 3 •6Н 2 О, Al(NO 3 ) 3 •9Н 2 О, Се(NO 3 ) 3 •6Н 2 О and two kinds of organic fuel, sucrose (C 12 H 22 O 11 ) and carbamide (СO(NH 2 ) 2 ) with the addition of hexamethylenetetramine ((CH 2 )6N 4 ) were used. The obtained samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and photoluminescence spectroscopy. It is found that primary particle diameter of YAG:Ce (average size of the coherent scattering) is 45 nm. Filled Polymer Composites (FPC) was formed by extrusion in the form of tape using as matrix a transparent high-density polyethylene. It has been established that the FPC luminesces with a maximum at the wavelength of 560 nm (yellow light) when excited at the wavelength of 465 nm (blue LED), and the total emission from the composite shows a bright white light.