Near-infrared scintillation characteristics of Nd3+-activated La2O3–TiO2–TeO2 glass and glass ceramics

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-05-09 DOI:10.1016/j.materresbull.2025.113544

Shuntaro Muneta , Naoki Kawano , Daisuke Nakauchi , Takumi Kato , Kai Okazaki , Kensei Ichiba , Akihiro Nishikawa , Keiichiro Miyazaki , Fumito Kagaya , Kenji Shinozaki , Takayuki Yanagida

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Abstract

We fabricated a tellurite glass (NLTT) having a composition of 1Nd₂O₃–10La₂O₃–10TiO₂–79TeO₂ and its corresponding glass ceramics (NLTT490 and NLTT500), and investigated the luminescence characteristics for near-infrared (NIR) emitting scintillators. NLTT490 and NLTT500 were obtained through a heat treatment process of NLTT at 490 °C and 500 °C for 24 hours, respectively. Clear photoluminescence and scintillation peaks appeared in the NIR wavelength region, and the peak positions were consistent with those due to the Nd³⁺ f–f electronic transitions. The photoluminescence quantum yields were 46 % for NLTT, 40 % for NLTT490, and 41 % for NLTT500, showing a slight decrease by the heat treatment. All samples exhibited an almost linear relationship between the dose rate and the NIR intensity under X-ray. The heat treatment led to increase the intensity of NIR scintillation, and NLTT500 exhibited a minimum measurable dose rate (0.5 mGy/h), which was lower than that of Nd³⁺-activated Bi₄Si₃O₁₂ and GdVO₄ single crystals.

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Nd3+活化La2O3-TiO2-TeO2玻璃及玻璃陶瓷的近红外闪烁特性

制备了一种由1Nd2O3-10La2O3-10TiO2-79TeO2组成的碲酸盐玻璃（NLTT）及其相应的玻璃陶瓷（NLTT490和NLTT500），并研究了其近红外闪烁体的发光特性。NLTT490和NLTT500分别经过490℃和500℃24h的NLTT热处理工艺得到。在近红外波长区域出现了清晰的光致发光和闪烁峰，峰位与Nd3+ f-f电子跃迁的峰位一致。NLTT的光致发光量子产率为46%，NLTT490为40%，NLTT500为41%，热处理后略有降低。所有样品均表现出剂量率与x射线下近红外强度之间的近似线性关系。NLTT500的最小可测剂量率为0.5 mGy/h，低于Nd3+活化的Bi4Si3O12和GdVO₄单晶。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.