Synthesis and luminescent properties of Eu3+/Eu2+ co-doped calcium aluminosilicate glass–ceramics

• Published in: Journal of luminescence Vol. 169; pp. 528 - 533
• Main Authors: Bouchouicha, H., Panczer, G., de Ligny, D., Guyot, Y., Baesso, M.L., Andrade, L.H.C., Lima, S.M., Ternane, R.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2016; Elsevier
• Subjects: Calcium aluminosilicate; Chemical Sciences; Engineering Sciences; Eu2; Eu3; Glass–ceramics; Photoluminescence; Physics; Raman; Glass–ceramics; Eu3; Raman; Eu2; Photoluminescence; Calcium aluminosilicate
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2014.11.054

Eu3+ and Eu2+ co-doped calcium aluminosilicate glass–ceramics have been prepared by devitrification of calcium aluminosilicate glass using heat-treatment. Control of crystallization in the glass–ceramics was studied by X-ray diffraction (XRD) and Raman spectroscopy. The results showed that crystalline phases in glass–ceramic belong to the family of melilite Ca2Mg0.25Al1.5Si1.25O7 as the major phase and anorthite CaAl2Si2O8 as the minor phase. Luminescent properties were investigated by emission; lifetime and the color points were calculated. Emission spectra showed that Eu2+ entered into the crystalline phase in a two steps mechanism: first as Eu3+ which is then reduced to Eu2+. This incorporation in the crystal enhanced Eu2+ emission with increasing time of heat-treatment and therefore crystallization. •Crystallization of doped glass–ceramics by heat-treatment controlled by microRaman.•Crystalline phases consist of melilite and anorthite.•Eu3+ and Eu2+ emissions characterized by their lifetime and color indexes.•Crystallization process modified efficiently the emission color point.