Optical and EPR spectral analysis of silicon and Magnesium oxides doped Calcium phospho-borate glasses and their dosimetric features

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2025-02-08 DOI:10.1016/j.optmat.2025.116790

A. Sobhy , M. Salah , E.M. Abou Hussein

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引用次数: 0

Abstract

Calcium phospho-borated (CPB) glasses doped with SiO₂ and MgO were synthesized using the melting-quenching method from Anodonta Rubens powder, a rich CaO source by ⁓ 94 % according to XRF analysis. HR-TEM analysis of Anodonta Rubens detected CaO and SiC nanoparticles with ∼45.7 and 80.5 nm sizes. XRD analysis confirmed the glasses' amorphous nature. FTIR spectra showed a combined vibration of borate and phosphate units linked to modifier ions, trigonal BO₃ with P–O bonds, and tetrahedral BO₄ with non-bridging PO₂ groups. FTIR spectra of Si-CPBG demonstrated more stability after gamma irradiation (50 kGy) than Mg-CPBG.

By irradiating the two samples up to 300 kGy, the color changed from colorless to brownish-purple, new peaks formed at 584 nm for Si-CPBG and 578 nm for Mg-CPBG according to UV–visible analysis. The optical band gap (Eopt) and density (ρ) gradually shrank with irradiation doses. EPR analysis revealed no pre-irradiation signals, but three signals appeared post-irradiation for both glass samples. Signal intensity increased up to 30 kGy for Mg-CPBG and 10 kGy for Si-CPBG.

The glass samples can be used as a label or dosimeter for high dose monitoring as they showed good optical stability in both light and dark. While there was a great fading in the EPR signal intensity over time that can be rectified by standardizing the time irradiation and measurements.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.

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