Fluorine alkaline earth (MgF2, CaF2, SrF2, BaF2) influence on thermal, structural, and luminescent properties of Eu3+-doped niobium phospho-fluoride glass

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2025-05-01 Epub Date: 2024-12-31 DOI:10.1016/j.materresbull.2024.113291

Leandro Olivetti Estevam da Silva , V.A.G. Rivera , Rodrigo Falci , Younès Messaddeq , Marcos de Oliveira Junior , Danilo Manzani

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Abstract

New rare earth-doped glasses with wide transparency and tunable optical properties show promise for various technological applications. While the effects of alkaline earth metals on glass compositions have been widely studied, their role in niobium-phosphate glasses remains unexplored. This study investigates Eu³⁺-doped niobium-lead pyrophosphate glasses modified with different alkaline earth metals, prepared via melt-quenching. Thermal, structural, optical, and spectroscopic properties were examined. Differential scanning calorimetry (DSC) showed that the thermal stability against crystallization decreased from Mg²⁺ to Ba²⁺, with Sr²⁺ exhibiting the lowest stability. Raman and solid-state NMR spectroscopy revealed minimal changes in the niobium-phosphate network but shifts in the Q⁰/Q¹ phosphate unit ratio were detected. Spectroscopic analysis showed that larger alkaline earth ions increase symmetry around Eu³⁺ and increase the ⁵D₀ lifetime. Sr²⁺-containing samples showed exceptional results, suggesting a possible substitution between Sr²⁺ and Pb²⁺ due to their similar ionic radii.

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氟碱土（MgF2、CaF2、SrF2、BaF2）对掺Eu3+铌磷氟化玻璃热、结构和发光性能的影响

具有宽透明度和可调谐光学特性的新型稀土掺杂玻璃显示出各种技术应用的前景。虽然碱土金属对玻璃成分的影响已被广泛研究，但它们在铌-磷酸盐玻璃中的作用仍未被探索。采用熔融淬火法制备了不同碱土金属改性的掺Eu3+铌铅焦磷酸玻璃。热、结构、光学和光谱性能进行了测试。差示扫描量热法（DSC）表明，从Mg2+到Ba2+的结晶热稳定性下降，其中Sr2+的稳定性最低。拉曼光谱和固态核磁共振光谱显示，铌-磷酸盐网络的变化很小，但Q0/Q1磷酸单位比发生了变化。光谱分析表明，较大的碱土离子增加了Eu3+周围的对称性，增加了5D0寿命。含有Sr2+的样品显示了特殊的结果，表明Sr2+和Pb2+之间可能存在替代，因为它们的离子半径相似。

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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.