【摘要】 含单相纳米晶体的玻璃陶瓷尽管能够为激活离子提供良好的发光环境，然而因其晶体场环境较为单一，在构造多色、多模式以及超宽带发光的光功能材料时受到了一定限制。基于此，研发双相纳米晶复合玻璃陶瓷对拓展该类功能材料的应用领域具有重要的研究意义。本文采用熔融淬火法在硅铝酸盐玻璃体系中成功析出了α-Zn₂SiO₄和β-Zn₂SiO₄纳米晶，通过调控Al₂O₃含量、热处理温度可以实现β-Zn₂SiO₄单相纳米晶向α/β-Zn₂SiO₄双相纳米晶共存的转变。进一步引入Mn²⁺，在285nm激发下，制得的玻璃陶瓷呈现可调谐的单带（～580nm）和连续双模（～530/580nm）发射，并且双宽带发光强度随Mn²⁺浓度和热处理温度而可调变化，对应样品的发光颜色逐渐由橘黄色变为黄绿色。结合纳米晶体结构和光谱数据对Mn²⁺可调控发光机理进行了解释。本研究结果对过渡金属离子掺杂双相玻璃陶瓷制备与可调宽带发光的基础研究及应用探索具有一定参考价值。更多还原

【Abstract】 Glass ceramics embedded with only one kind of nanocrystals are usually cannot meet the requirements of multi-color,multi-mode and ultra-wideband luminescence applications due to the limitation of single crystal field environment.It is thus of significance to develop dual-phase nanocrystal-based glass ceramics for expanding the application field of this kind of functional materials.In this paper,an aluminosilicate glass ceramic containing α-Zn₂SiO₄ and β-Zn₂SiO₄ nanocrystals was successfully prepared by a melt quenching technique.The transition from singlephase to dual-phase nanocrystals can be achieved by varying Al₂O₃ content and heat treatment temperature.The obtained glass ceramics exhibit tunable single-band （～580 nm） and continuous dual-mode （～530/580 nm） emission under the excitation of 285 nm,and the luminescence intensity varies with the concentration of Mn²⁺and heat treatment temperature,resulting in a tunable emissive color from orange to yellowish.The related luminescence mechanism was explained by combining with the structure of nanocrystals and spectral data.This research may be of reference value for the preparation of dual-phase glass ceramics and exploration of broadband light source.更多还原