Cr4+掺杂Li1.14Zn1.43SiO4透明微晶玻璃近红外宽带光谱特性

采用高温熔融法和热处理制备了Cr⁴⁺掺杂Li_1.14Zn_1.43SiO₄微晶玻璃, 探讨了不同热处理温度下样品的物相、微观形貌及发光性能. 结果表明: 580℃热处理2h得到的微晶玻璃, Li_1.14Zn_1.43SiO₄微晶的粒径约为5nm, 在808nm的二极管激发下, 可观察到中心波长位于1226nm, 半高宽为230nm的近红外宽带发射峰, 荧光寿命约为200.73±1.71μs. 随着热处理温度的升高, Cr⁴⁺离子所处的晶体场环境发生了变化, 且可以观察到样品吸收光谱发生微弱的蓝移, 而荧光光谱发生少量的红移, 分析了晶体场环境变化对样品发光性能的影响.关键词：铬离子微晶玻璃超宽带发光晶体场

Broad band infrared optical properties of Cr4+-doped Li1.14Zn1.43SiO4 transparent glass-ceramics

Cr⁴⁺-doped transparent Li_1.14Zn_1.43SiO₄ glass-ceramics were prepared by high-temperature melting and subsequent heat-treatment, and the crystalline, microstructural, and luminescence properties of the products prepared by different-temperature heat-treatment were investigated. Results showed that the glass-ceramics heat-treated at 580 ℃ for 2 h contained nano crystallines of about 5 nm in size, and a broadband infrared emission centered at 1226nm with full width at half maximum of more than 230 nm and a decay time of about 200.07 μs were observed by exciting with an 808 nm laser diode. Mean while, it is believed that the crystalline field environment of Cr⁴⁺ is changed with the increase of heat-treatment temperature, which results in blue shift and red shift of absorption and fluorescence spectra, respectively.
Keywords：4+ ions')" href="#">Cr⁴⁺ ionsglass-ceramicsbroad band infrared luminescencecrystalline field