钴离子掺杂铝酸锌透明微晶玻璃的制备和光学特性

来源期刊:中国有色金属学报2014年第10期

论文作者:李 巍 陈文哲 郑 婵

文章页码:2559 - 2565

关键词:微晶玻璃;铝酸锌;钴离子;光学特性

Key words:glass ceramics; ZnAl2O4; Co2+ ion; optical property

摘    要:用溶胶-凝胶法制备透明的钴离子掺杂铝酸锌块体微晶玻璃,采用差热-热重分析、X射线粉末衍射谱、傅里叶红外光谱分析和吸收光谱对热处理前后微晶玻璃的热学性能、显微结构以及光学特性进行了研究。结果表明:铝酸锌纳米晶平均晶粒尺寸为12~14 nm。在红外光吸收谱1200~1600 nm处有很强的吸收宽峰,对应四配位Co2+离子的4A24T1(4F)跃迁,且随着热处理温度的提高,吸收强度增强。通过计算,经1000 ℃热处理后样品的吸收截面系数为1.15×10-19 cm2,这表明微晶玻璃在铒玻璃激光器的被动调Q开关中具有潜在的应用前景。

Abstract: The transparent Co2+:ZnAl2O4-SiO2 block glass ceramics with doping of transition metal ions Co2+ were synthesized by sol-gel method. The DSC-TG, X-ray diffraction, Fourier infrared spectrometer and visible and near-infrared absorption spectra were performed to study the microstructure and the optical properties of glass ceramics. The results show that the average size of the ZnAl2O4 nanocrystals is 12-14 nm. The glass ceramics exhibit a broad absorption band in the range of 1200-1600 nm. And the absorption coefficient enhances with the increase of heat-treating temperature, which is characteristic of 4A24T1(4F) transition from the tetrahedral Co2+ ions. The absorption cross section reaches 1.15×10-19 cm2 when the heat-treating temperature is up to 1000 ℃, which means that it can be applied in the passive Q-switch turnable laser.

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