Preparation and Optical Properties of Transparent Glass‐Ceramics Containing Cobalt(ll) Ions
Preparation and Optical Properties of Transparent Glass‐Ceramics Containing Cobalt(ll) Ions
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DOI：
10.1111/j.1151-2916.1993.tb04025.x
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发表时间：
1993-11
影响因子：
3.9
通讯作者：
Katsuhisa Tanaka;T. Mukai;T. Ishihara;K. Hirao;N. Soga;S. Sogo;M. Ashida;R. Kato
中科院分区：
文献类型：
--
作者：
Katsuhisa Tanaka;T. Mukai;T. Ishihara;K. Hirao;N. Soga;S. Sogo;M. Ashida;R. Kato
分别对锌铝硅酸盐和没食子酸锂硅酸盐系统的玻璃进行热处理，制备了含ZnAl_2 O_4：Co ~（2+）和LiGa_5 O_8：Co ~（2+）微晶的透明微晶玻璃。晶体LiGa 5 O 8已经在所制备的试样中沉淀，而ZnAl 2 O 4：Co2+在热处理后从玻璃中沉淀。对于这两种体系，随着热处理温度的升高，微晶尺寸从约5至20 nm变化，并且包含小于约10 nm微晶的玻璃-陶瓷是透明的。与单晶的低温光吸收和发射光谱进行了比较，表明几乎所有的Co 2+离子取代ZnAl 2 O 4系统中的Zn 2+离子，而一些Co 2+离子被纳入LiGa 3 O 8系统，虽然在后者系统中保留在玻璃基质中的Co 2+的量是相当大的。
Transparent glass-ceramics containing ZnAl2O4:Co2+ and LiGa5O8:Co2+ crystallites have been prepared by heat treatment of glasses in the zinc aluminosilicate and lithium gallate silicate systems, respectively. Crystalline LiGa5O8 was already precipitated in an as-prepared specimen, while ZnAl2O4:Co2+ precipitated from the glass upon heat treatment. The crystallite size varies from about 5 to 20 nm with increasing heat treatment temperature for both systems, and glass-ceramics containing crystallites of less than about 10 nm are transparent. The low-temperature optical absorption and emission spectra are compared with those of single crystals, indicating that almost all of the Co2+ ions replace Zn2+ ions in the ZnAl2O4 system, while some of the Co2+ ions are incorporated into the LiGa3O8 system, although the amount of Co2+ which remains in the glass matrix is rather large in the latter system.