(1. 福州大學(xué) 材料科學(xué)與工程學(xué)院，福州 350116；
2. 福建工程學(xué)院 材料科學(xué)與工程學(xué)院，福州 350118；
3. 廈門理工學(xué)院 材料科學(xué)與工程學(xué)院，廈門 361024)
摘 要: 用溶膠-凝膠法制備透明的鈷離子摻雜鋁酸鋅塊體微晶玻璃，采用差熱-熱重分析、X射線粉末衍射譜、傅里葉紅外光譜分析和吸收光譜對(duì)熱處理前后微晶玻璃的熱學(xué)性能、顯微結(jié)構(gòu)以及光學(xué)特性進(jìn)行了研究。結(jié)果表明：鋁酸鋅納米晶平均晶粒尺寸為12~14 nm。在紅外光吸收譜1200~1600 nm處有很強(qiáng)的吸收寬峰，對(duì)應(yīng)四配位Co2+離子的4A2→4T1(4F)躍遷，且隨著熱處理溫度的提高，吸收強(qiáng)度增強(qiáng)。通過計(jì)算，經(jīng)1000 ℃熱處理后樣品的吸收截面系數(shù)為1.15×10-19 cm2，這表明微晶玻璃在鉺玻璃激光器的被動(dòng)調(diào)Q開關(guān)中具有潛在的應(yīng)用前景。
關(guān)鍵字: 微晶玻璃；鋁酸鋅；鈷離子；光學(xué)特性
（1. College of Materials Science and Engineering，F(xiàn)uzhou University，F(xiàn)uzhou 350116，China；
2. College of Materials Science and Engineering，F(xiàn)ujian University of Technology，F(xiàn)uzhou 350118，China；
3. College of Material Science and Engineering, Xiamen University of Technology, Xiamen 361024, China）
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 4A2→4T1(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.
Key words: glass ceramics; ZnAl2O4; Co2+ ion; optical property
