Lithium concentration effect on crystallization kinetics and spectral properties of Cr-doped Li2O-K2O-Al2O3-B2O3 glass-ceramics; Ceramics International; Vol. 49, iss. 12
| Parent link: | Ceramics International Vol. 49, iss. 12.— 2023.— [P. 20061-20070] |
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| 企业作者: | |
| 其他作者: | , , , , , , , , |
| 总结: | Title screen 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. Режим доступа: по договору с организацией-держателем ресурса |
| 语言: | 英语 |
| 出版: |
2023
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| 主题: | |
| 在线阅读: | https://doi.org/10.1016/j.ceramint.2023.03.129 |
| 格式: | 电子 本书章节 |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669337 |