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HA/β-TCP复合荧光粉的微乳液合成及光学温度传感器特性

Microemulsion synthesis and optical temperature sensor properties in HA/β-TCP composite phosphors.

作者信息

Thang Cao Xuan, Nguyen Duy-Hung, Pham Vuong-Hung, Tung Nguyen Viet, Bich Do Danh, Van Hoang Nhu

机构信息

School of Materials Science and Engineering (SMSE), Hanoi University of Science and Technology (HUST) Hanoi Vietnam.

Faculty of Physics, Hanoi National University of Education Cau Giay Hanoi Vietnam.

出版信息

RSC Adv. 2025 Jun 25;15(27):21687-21699. doi: 10.1039/d5ra02458g. eCollection 2025 Jun 23.

DOI:10.1039/d5ra02458g
PMID:40567476
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12188427/
Abstract

Herein, a novel microemulsion (ME) method for the synthesis of rare earth-element-doped hydroxyapatite (HA)/beta-tricalcium phosphate (β-TCP) composite phosphors was performed and yielded phosphors with intense green upconversion (UC) emission and high temperature sensitivity. The effect of polyvinyl alcohol (PVA) content on the structure and luminescence properties of the phosphors was investigated in detail. X-ray diffraction and Raman spectra showed that the mixed phases included the main hexagonal HA phase and the secondary orthorhombic β-TCP phase. Under 975 nm excitation, the obtained phosphors exhibited strong green UC emission, and their intensity depended on PVA content. Notably, the fluorescence intensity ratio technique revealed that the phosphors had a high color purity of up to 94.77% and high temperature sensitivity of 0.93% K at 293 K. These results indicate that the phosphors are suitable for applications in thermal sensors and optoelectronic devices.

摘要

在此，我们采用了一种新颖的微乳液（ME）方法来合成稀土元素掺杂的羟基磷灰石（HA）/β-磷酸三钙（β-TCP）复合荧光粉，所得荧光粉具有强烈的绿色上转换（UC）发射和高温度敏感性。详细研究了聚乙烯醇（PVA）含量对荧光粉结构和发光性能的影响。X射线衍射和拉曼光谱表明，混合相包括主要的六方HA相和次要的正交β-TCP相。在975 nm激发下，所得荧光粉呈现出强烈的绿色UC发射，其强度取决于PVA含量。值得注意的是，荧光强度比技术表明，这些荧光粉具有高达94.77%的高色纯度和在293 K时0.93% K的高温度敏感性。这些结果表明，这些荧光粉适用于热传感器和光电器件应用。

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