Author/Authors :
Bykov، نويسنده , , A.B. and Sharonov، نويسنده , , M.Yu. and Petricevic، نويسنده , , V. and Popov، نويسنده , , I. M. Isaacs، نويسنده , , L.L. and Steiner، نويسنده , , J. and Alfano، نويسنده , , R.R.، نويسنده ,
Abstract :
Synthesis and devitrification behavior of Cr-doped CaO–GeO2–Li2O–B2O3(Al2O3) glasses have been studied. A range of glass compositions was found to yield transparent glass-ceramics after devitrification. The size of crystallites is below 1 μm. Glass-ceramic samples exhibit 1050–1600 nm broad-band emission with a maximum around 1260 nm, very similar to the emission of Cr4+:Ca2GeO4 bulk crystals. X-ray diffraction measurements indicate that the structure of crystallites exhibiting near infrared emission in glass-ceramics may be assigned to Cr4+:Ca2GeO4 with increased lattice parameters.
Keywords :
Glass-ceramics , germanates , Luminescence , ABSORPTION
