Lithium concentration effect on crystallization kinetics and spectral properties of Cr-doped Li2O-K2O-Al2O3-B2O3 glass-ceramics

被引:6
作者
Kulpina, Ekaterina [1 ]
Babkina, Anastasiia [1 ]
Zyryanova, Ksenia [1 ]
Valiev, Damir [2 ]
Stepanov, Sergey [2 ]
Nuryev, Rustam [1 ]
Ignatiev, Alexander [1 ]
Zhizhin, Evgeny [3 ]
Koroleva, Aleksandra [3 ]
机构
[1] ITMO Univ, Kronverksky Ave 49, St Petersburg 197101, Russia
[2] Natl Res Tomsk Polytech Univ, Lenin Ave 30, Tomsk 634050, Russia
[3] St Petersburg Univ, 7-9 Univ skaya nab, St Petersburg 199034, Russia
基金
俄罗斯科学基金会;
关键词
Alkali-alumina-borate glass; Luminescent glass-ceramics; Trivalent chromium ions; Avrami parameter; Crystallization kinetics; Activation energy; Red radiation source; NONISOTHERMAL CRYSTALLIZATION; TRANSPARENT; LUMINESCENCE; TRANSITION; NUCLEATION; PARAMETERS; CRYSTALS; BORATE;
D O I
10.1016/j.ceramint.2023.03.129
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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 LiAl7B4O17 crystalline phase is formed. With Li2O content rising crystallinity of the material increases from 27 to 69% and the crystalline field strength Dq/B of Cr3+ 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.% Li2O 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.% Li2O. 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.
引用
收藏
页码:20061 / 20070
页数:10
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