Visible luminescence properties of Ho3+ doped high-density germanate glasses for X-ray computed tomography (CT)

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-09-02 DOI:10.1016/j.mseb.2025.118743

Junfei Zhou, Hao Liu, Jingtao Zhao, Gongxun Bai, Shilong Zhao, Shiqing Xu, Lihui Huang

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Abstract

Using the melt-quenching method, Ho³⁺ doped germanate glasses with high density have been prepared. The compositions of Ho³⁺ doped germanate glasses were 50GeO₂-15Lu₂O₃-10BaO-10Al₂O₃-(15-x)La₂O₃-xHo₂O₃ (x = 0, 0.25, 0.5, 0.75, 1.0, and 1.25, in mol%) and the measured densities ranged between 5.96 ± 0.02 and 6.05 ± 0.02 g/cm³. The physical and optical performance of the samples were expressed by differential scanning calorimetry (DSC), transmission spectra, photoluminescence (PL) spectra, fluorescence decay, and X-ray excited luminescence (XEL) spectra. Excited by 449 nm light and X-ray, Ho³⁺ exhibits strong green emission around 553 nm. The 553 nm emission lifetimes of Ho³⁺ exhibited microsecond-scale values ranging from 43.54 to 52.03 μs. The results show the potential of Ho³⁺ doped germanate glasses with high density to be served as scintillators for X-ray CT.

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Ho3+掺杂高密度锗酸盐玻璃x射线计算机断层扫描（CT）的可见发光特性

采用熔淬法制备了高密度掺杂Ho3+的锗酸盐玻璃。掺Ho3+的锗酸盐玻璃的组成为50GeO2-15Lu2O3-10BaO-10Al2O3-(15-x)La2O3-xHo2O3 (x = 0、0.25、0.5、0.75、1.0和1.25,mol%)，测量密度范围为5.96±0.02和6.05±0.02 g/cm3。通过差示扫描量热法（DSC）、透射光谱、光致发光（PL）光谱、荧光衰减光谱和x射线激发发光（XEL）光谱对样品的物理和光学性能进行了表征。在449 nm光和x射线的激发下，Ho3+在553 nm附近表现出强烈的绿色辐射。Ho3+在553 nm的发射寿命微秒范围为43.54 ~ 52.03 μs。结果表明，高密度掺杂Ho3+的锗酸盐玻璃具有作为x射线CT闪烁体的潜力。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.