旋流雾化火焰合成稀土掺杂氧化钇的结构形貌和光电性能调控研究
Investigation of Structural Morphology,Optical and Electrical Property Optimization of Rare Earth Doped Yttrium Oxide Prepared Through Swirling Spray Flame Synthesis
雷舒婷 1张易阳 2李水清1
作者信息
- 1. 清华大学热能工程系热科学与动力工程教育部重点实验室,北京10084
- 2. 清华大学核能与新能源技术研究院,先进核能技术协同创新中心,先进反应堆工程与安全教育部重点实验室,北京10084
- 折叠
摘要
稀土元素掺杂的钇基纳米颗粒在荧光发光、激光晶体和透明陶瓷等领域具有广阔的应用前景.本文针对Ce,Nd,Yb和La四种稀土元素,采用旋流雾化火焰合成方法,实现了一步连续合成Re:Y2O3(Re=Ce,Nd,Yb,La)纳米颗粒,并对合成的纳米颗粒形貌结构及光电性能进行了探究.结果表明所合成的纳米颗粒粒径均匀分布(约10 nm),结晶度良好,呈立方相.掺杂引起的晶胞畸变程度与掺杂元素的离子半径成正相关.不同稀土掺杂元素均导致材料的相对介电常数和介电损失增高.在200～2000 nm波长范围内,1％Yb元素掺杂带来的光谱吸收比增高最多,增高至22.83％.5％La元素掺杂带来的光谱吸收比增高最低,为14.92％.此外,5％La掺杂使得禁带宽度下降至4.53 eV,导致其在紫外区间内的光学吸收大幅增加.
Abstract
Yttrium-based nanoparticles doped with rare earth have promising applications in the fields of fluorescent material,laser crystals and transparent ceramics.In this paper,a one-step continuous synthesis of Re:Y2O3(Re=Ce,Nd,Yb,La)nanoparticles was prepared by swirling spray flame synthesis method,and the structural morphology,optical and electrical properties of the synthesized nanoparticles were investigated.The results show that the synthesized nanoparticles have uniform particle size distribution(about 10 nm),good crystallinity and cubic phase.The distortion of lattice cell is positively correlated with the ionic radius of the doped elements.Different rare earth doping elements all lead to higher relative permittivity and dielectric loss.In the wavelength range of 200～2000 nm,1％Yb doping brings the highest increase in spectrum absorption,which is 22.83％.5％La doping brings the lowest increase in spectrum absorption,which is 14.92％.In addition,the 5％La doping decreases the forbidden band width to 4.53 eV,resulting in a significant increase in spectrum absorption in the UV region.
关键词
火焰合成/稀土掺杂/氧化钇纳米颗粒/光电性能Key words
flame synthesis/rare earth doping/yttrium oxide nanoparticles/optical and electrical properties引用本文复制引用
出版年
2024
NETL
NSTL
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