Lithium concentration effect on crystallization kinetics and spectral properties of Cr-doped Li2O–K2O–Al2O3–B2O3 glass-ceramics. Issue 12 (15th June 2023)

• Record Type: Journal Article
• Authors: Kulpina, Ekaterina; Babkina, Anastasiia; Zyryanova, Ksenia; Valiev, Damir; Stepanov, Sergey; Nuryev, Rustam; Ignatiev, Alexander; Zhizhin, Evgeny; Koroleva, Aleksandra
• Is Part Of: Ceramics international. Volume 49:Issue 12(2023)
• Page Start: 20061
• Page End: 20070
• Publication Date: 2023-06-15
• Subjects: Alkali-alumina-borate glass -- Luminescent glass-ceramics -- Trivalent chromium ions -- Avrami parameter -- Crystallization kinetics -- Activation energy -- Red radiation source; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2023.03.129
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Alkali-aluminaborate glass-ceramics doped with Cr ions are synthesized by volume crystallization. According to non-isothermal DSC method three parallel processes occur in material: 2D Avrami-Yerofeev nucleation, 2D and 3D crystallization. During the heat treatment, the LiAl7 B4 O17 crystalline phase is formed. With Li2 O content rising crystallinity of the material increases from 27 to 69% and the crystalline field strength Dq/B of Cr 3+ increases from 2.25 to 3.55. The photoluminescence spectra possess intense bands at 685, 700, and 715 nm for glass with 6.8 mol.% Li2 O and higher and its decay kinetics is described by the sum of two exponentials. The maximum luminescence QY obtained is 50% at 16.1 mol.% Li2 O. The highest conversion efficiency of the 532 nm LED luminescence obtained by glass-ceramics with chromium is 10%. Thus, Cr-doped alkali-alumina-borate glass-ceramics are a promising material for use in the design of radiation sources for the red and NIR spectral regions. Graphical abstract: Image 1