Radiophotoluminescence properties of Bi-doped NaCaBO3

Journal of Alloys and Compounds

Published On 2024/4/5

Bi-doped NaCaBO3 exhibits radiophotoluminescence (RPL) properties, where the Bi2+ centre is formed through X-ray irradiation. As a result of RPL, a broad emission band appears around 800 nm in the photoluminescence (PL) spectrum, attributed to X-ray irradiation. The intensity of the PL signal is proportional to the irradiation dose, making it useful for measuring accumulated radiation dose. The sensitivity depends on the doping concentration of Bi, and the optimal concentration to maximize sensitivity is approximately 0.005%. With a laboratory-constructed reader system, the optimal sample enables measurement of X-ray dose as low as 25 mGy. Following irradiation, the Bi2+ signal slightly increases by about 13%, but it is significantly reduced to around 7% of the initial value after heat treatment at 500°C for 100 s. The formation and annihilation of the Bi2+ centre can be reproduced multiple times. Therefore …

Journal

Journal of Alloys and Compounds

Published On

2024/4/5

Volume

979

Page

173498

Authors

Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

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H-Index(all)

44

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19

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0

I-10 Index(since 2020)

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Odor sensor

Dosimeter

Thin films

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Other Articles from authors

Hidehito Nanto

Hidehito Nanto

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

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2023/12/20

Article Details
Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Journal of Materials Science: Materials in Electronics

ESR studies to elucidate the origin of the RPL emission of undoped-CaSO4

Recent research has shown that CaSO4, without any intentional addition of impurities, exhibits remarkable radiophotoluminescence (RPL) properties. However, the origin of the RPL in CaSO4 has yet to be fully understood. ESR measurements were carried out to identify the defect species responsible for RPL and elucidate the luminescence’s origin. ESR measurements on undoped-CaSO4 with different radiation sensitivities showed SO4−, SO2−+SO3−, PO42−, Si=O3 in P2O5–SiO2 (E’ center), Al2O3 hole center and Mn2+ defect species in CaSO4. This means that CaSO4 contains Al2O3, Mn2+, P, and Si as impurities, which are not intentionally added to CaSO4. As the results of this study, the different impurity states may influence the radiation sensitivity of the materials. It is suggested that the deliberate addition of P and Si elements, Al2O3 and Mn2+ could control the RPL properties.

Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Materials Research Bulletin

X-ray induced reduction of Sm3+ into Sm2+ in Li2CaSiO4 and its potential for radiation measurement applications

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Journal of Materials Science: Materials in Electronics

Radio-photoluminescence properties of Eu-doped SrAl2O4 ceramics and thermally assisted charge transfer process

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Recent advances in radiophotoluminescence materials for luminescence dosimetry

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2022/11/22

Article Details
Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Optically stimulated luminescence dosimeters: principles, phosphors and applications

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2022/11/21

Article Details
Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

IEEJ Transactions on Sensors and Micromachines

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Sensors and Materials

Radiophotoluminescence Imaging Reader for Passive Dosimetry

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Japanese Journal of Applied Physics

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Phosphors for Radiation Detectors

Optically‐Stimulated Luminescent Dosimeters

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Journal of The Institute of Electrical Engineers of Japan

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Physical Review Research

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2021/11/15

Article Details
Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Materials Letters

Radiation-induced reduction of Eu3+ doped in SrAl2O4

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2021/11/15

Article Details
Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Sensors & Materials

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

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Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

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瀬戸就一 他: 半導体式ガスセンサの過渡応答出力の解析, 電気学会論文誌 E センサマイクロマシン準部門誌 Vol. 125 No. 3, p. 129-134 (2005)

Hidehito Nanto

Hidehito Nanto

Kanazawa Institute of Technology

Radiation Measurements

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King AbdulAziz University

Journal of Alloys and Compounds

Exploring the mechanical and structural properties of B4C/ZrO2 strengthened Al-Mg-Cr alloy hybrid composites

Al-Mg-Cr alloys have been extensively used due to their inherent characteristics, including lightweight, high strength, resistance to corrosion, and recyclability. Still, the residues of various intermetallic phases cause grain boundary sliding and recrystallization at elevated temperatures, minimising their mechanical properties. This can be improved by adding suitable ceramic-strengthening particulates. The current study involved synthesizing B4C of varying weight proportions, retaining ZrO2 as a constant with Al-Mg-Cr alloy using a vacuum-assisted stir casting process; an ASTM standard investigated its microstructure and mechanical properties. Microstructure observation inferred that the ceramic strengthening particles are equally disseminated, and the Cu-Al2, Mg2Si, and Zn-Al2 eutectic precipitate at the grain boundaries of Al-Mg-Cr alloy solid solution. The mechanical properties of the 8 wt% B4C+ 2 wt% ZrO2 …

Byong-Hun Jeon

Byong-Hun Jeon

Hanyang University

Journal of Alloys and Compounds

Zirconium-Based Metal–Organic Frameworks/Porous Carbon Hybrids as High-Performance Anode Materials for Highly Stable Lithium-and Potassium-Ion Batteries

Metal-organic framework (MOF)-derived carbon materials have been widely investigated as advanced electrode materials. However, post-synthetic modifications suffer from certain limitations in morphology, surface area, and pore size control. Herein, we report a simple strategy to synthesize surface-confined Zirconium(Zr)-based MOF UiO-66-NH2 carbon hybrids (Zr-MOF@C; denoted as Zr-MOF, Zr-MOF@C10, Zr-MOF@C25, and Zr-MOF@C50) through a covalent assembly/amide linkage between the MOFs and hierarchical porous carbon (PC) in various proportions under solvothermal conditions. Zr-MOF@C hybrids have been utilized as the anode materials for lithium- (LIBs) and potassium-ion batteries (KIBs). In LIBs, the Zr-MOF@C10, Zr-MOF@C25 and Zr-MOF@C50 anodes delivered the discharge capacities of 126, 65 and 94 mA h g−1 at 100 mA g−1 after 100 cycles, respectively. In KIBs, the Zr-MOF@C10 …

Narayan Chandra Das

Narayan Chandra Das

Indian Institute of Technology Kharagpur

Journal of Alloys and Compounds

Stretchable and lightweight 2D MXene-based elastomeric composite foam for suppressing electromagnetic interference

The utilization of lightweight materials that provide electromagnetic interference (EMI) shielding and impact attenuation is crucial for safeguarding fragile components in portable electronic devices. Although conductive foams have shown promise in providing lightweight electromagnetic interference (EMI) shielding, their potential for impact attenuation has yet to be thoroughly investigated. In this study, we fabricated a composite foam consisting of MXene and carboxylated nitrile rubber (MXene/XNBR) to achieve multifunctional properties such as electromagnetic interference (EMI) shielding and thermal management. The fabrication method involved the utilization of MXene nanoflakes and XNBR elastomer through a dual mixing approach, which encompassed both melt and solution mixing techniques. Utilizing a chemical blowing agent in integrating cellular structure inside a composite material has resulted in …

Narayan Chandra Das

Narayan Chandra Das

Indian Institute of Technology Kharagpur

Journal of Alloys and Compounds

Fe3O4@ g-C3N4 and MWCNT embedded highly flexible polymeric hybrid composite for simultaneous thermal control and suppressing microwave radiation

The issue of electromagnetic interference creates an intense challenge in modern civilisation due to the continuous need for electronic equipment in various industries. The current attention is centred on materials that possess characteristics such as lightweight, processability, resistance to corrosion, high flexibility, and compatibility with established technologies, in order to address this issue. The present investigation involved the fabrication of a new composite material using a solvent mixing method. The fabricated polymer composite was based on a matrix of Ethylene Methyl Acrylate (EMA) polymer and incorporated two types of fillers: Fe3O4@g-C3N4 (Fe3O4 nanoparticles decorated on g-C3N4) and MWCNTs. Fillers embedded within polymer matrices have garnered significant interest owing to their capacity to enhance the thermal, mechanical, and electrical properties of the composite materials. The Fe3O4@g …

Francisco Moura

Francisco Moura

Universidade Federal de Itajubá

Journal of Alloys and Compounds

Unveiling the polar properties on barium bismuthate perovskite thin films with distinct Ba/Bi ratios

This research aims to investigate the domain structure of BaBiO3 (80:20), BaBiO3 (50:50), and BaBiO3 (30:70) thin films obtained by the polymeric precursor method. For better sample designations, the following codes were employed: (80:20) (BBO82), (50:50) (BBO55), and (30:70) (BBO37). The piezo-ferroelectric coupled behavior observed for barium bismuthates thin films was elucidated in terms of bismuth and oxygen vacancies as well as grain morphology, which can be controlled by stoichiometric changes (Ba/Bi ratios). The films crystallize in a rhombohedral BaBiO3 structure with an R-3R space group without any deleterious secondary phase. Additionally, the hysteretic strain, dielectric, ferroelectric, and piezoelectric properties of BaBiO3 thin films are strongly dependent on the film texture. Sample BBO55 showed a distinguished preferred orientation along the (341) plane with a low associated coercive field …

Ammar Oad

Ammar Oad

Central South University

Journal of Alloys and Compounds

Y2GaSbO7: A novel microwave dielectric ceramic with pyrochlore structure

Ceramics of Y2GaSbO7 (YGSO) were prepared by the solid-state reaction method. The ceramics were confirmed by XRD and TEM to exhibit the Fd-3 m (227) space group and a cubic pyrochlore structure within the temperature range of 1420–1500 °C. XPS verified that the valence states of Y, Ga, and Sb in the ceramics were + 3, + 3, and + 5, respectively. Additionally, the relationship between the FWHM of the notable peak at 775 cm−1 and the Q × f value was elucidated through Raman spectroscopic analysis. The analysis of the P-V-L theory revealed that the Sb-O bond is crucial in determining εr, while the values of τf and Q × f are affected by the Y-O bond. At 1460 °C, YGSO ceramics obtained the maximum relative density (97.5%) and the best microwave dielectric properties (εr = 14.78, Q × f = 50,153 GHz, and τf = –22.3 ppm/°C).

Barbara Di Credico

Barbara Di Credico

Università degli Studi di Milano-Bicocca

Journal of Alloys and Compounds

Hydrothermal synthesis of Cu-substituted Ni ferrites: Structural, morphological, and magnetic properties

Cu-substituted Ni ferrite systems are produced following a hydrothermal synthetic route carried out at relatively mild conditions (i.e., below 200 °C). Different degrees of substitution were investigated, ranging from bare Ni ferrite to a complete Cu-substituted system (by replacing 100% of Ni with Cu). Morphological and structural characterisations point out that the introduction of Cu in the Ni ferrite (below 50% substitution) causes a gradual reduction of the average diameter of the ferrite polyhedral nanoparticles maintaining the Ni ferrite structure. At higher content of Cu, instead, the morphology evolves toward the co-presence of iron oxides (magnetite and hematite) and copper oxide (tenorite), without the formation of bare Cu ferrite. The partially substituted Ni ferrite nanomaterials exhibit a mostly superparamagnetic behaviour in all samples, registering a reduction of the values of magnetisation saturation by …

Tom Depover

Tom Depover

Universiteit Gent

Journal of Alloys and Compounds

Characterisation of hydride formation in as-built and heat treated laser powder bed fused Ti-6Al-4V

Despite the increasing developments in laser powder bed fusion (L-PBF) of titanium, no relationships have been established yet on the hydride formation in the L-PBF titanium alloy Ti-6Al-4V. Nevertheless, insights in the development of titanium hydrides in this particular microstructure are eg useful for thermohydrogen processing and to avoid premature failure. Therefore, this work investigated the formation of titanium hydrides in as-built and heat treated L-PBF Ti-6Al-4V. Hydrogen was introduced via electrochemical hydrogen charging until hydrides precipitated. The evolution of titanium hydride formation was observed to be closely related to the microstructure, being associated to the hydrogen solubility and diffusivity in the different crystallographic phases. Investigation by scanning electron microscopy (SEM) and X-ray diffraction (XRD) demonstrated that parallelisms could be drawn to the hydride development …