Er^(3+)/Yb^(3+)共掺光频变换防伪材料的微波合成及应用  

Microwave Synthesis and Application of Er^(3+)/Yb^(3+) Co-Doped Optical Frequency Conversion Anti-Counterfeiting Coating

作　　者：李元耀[1] 刘铁根[1] 杜阳[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2013年第6期493-497,共5页Journal of Tianjin University：Science and Technology

摘　　要：把微波能量应用于物质的高温热处理上是近年来的一个研究热点.由于微波的"有质动力效应",用微波加热物质能极大程度上减少反应时间和能量消耗,因此对Er3+/Yb3+共掺光学频率变换材料的新型微波合成方法进行了研究.所制材料在980,nm及1,540,nm处均有较强的吸收,且在980,nm激光激发下能发出1,540,nm左右的荧光.根据吸收光谱及发射光谱的特点,将其应用于防伪方面并对其光谱图像做了详细的研究.采用本方法制成的防伪涂料防伪特征明显,防伪级别高,具有广阔的应用前景.Because of drastic reduction in processing time and energy cost, microwave radiation applied as an alternative method for synthesizing solids has been recently concerned. Er3＋/yb3＋ co-doped anti-counterfeiting coating was synthesized using this approach. The phenomenon of microwave enhanced mass transport was observed in this process, which is attributed to ＇microwave ponderomotive effect＇. The as-prepared coating has strong absorption at 980 nm and 1 540 nm, and can fluoresce at 1 540 nm with the excitation of 980 nm laser. Its exact spectral images were also studied. According to the characteristics of the absorption and emission spectrum, the as-prepared coating with high security level and obvious anti-counterfeiting features will have a great application.

关 键 词：稀土 防伪 微波 合成方法 光学频率变化 

分 类 号：N33[自然科学总论] N39