An experimental study on the radiation shielding properties of new type ceramics containing limonite and hematite minerals

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-04-05 DOI:10.1016/j.matchemphys.2025.130841

Berna Oto , Esra Kavaz , Zekiye Madak , Nurtaç Çakar

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Abstract

In this study, the development and evaluation of new ceramic materials doped with limonite and hematite minerals in terms of their effectiveness in gamma ray and neutron shielding was investigated. The primary aim is to determine gamma-ray shielding parameters for these ceramics, using gamma photon energies emitted from the Barium-133 radioisotope at specific energy levels (81, 160, 223, 302, 356, and 383 keV). Measurements were conducted using a Canberra Ultra Ge detector to detect the intensities of radiations. The mass attenuation coefficient (μ_ρ), half-value thickness (Δ_0.5), mean free path (λ) and effective atomic numbers (Z_eff) were determined experimentally and theoretically. And, exposure (EBF) and energy absorption (EABF) buildup factor values of ceramics were determined at different mean free paths and photon energies using the EpiXS program. Intercalarily, fast neutron attenuation parameters (Σ_R) of ceramics have also been calculated. The densities of the ceramics increased with the addition of limonite and hematite minerals, ranging from 2.61 g/cm³ to 3.12 g/cm³ as the limonite content increased from 0 wt% to 30 wt %. Similar density variations were observed with the addition of hematite. There is a direct proportional relationship between the density of the ceramics and their shielding effectiveness. The effective atomic numbers (Z_eff) were ranked as C < H1 < H2 < H3 < L1 < L2 < L3, indicating that the shielding effectiveness improves with higher doping levels. The L3 ceramic (with 30 % limonite addition) sample exhibited the highest fast neutron removal cross-section values among the tested samples. The findings demonstrate that doping ceramics with limonite and hematite minerals enhances their density and significantly improves their shielding capabilities against both gamma radiation and fast neutrons. This suggests that such doped ceramics could be effectively used in radiation protection applications.

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关于含有褐铁矿和赤铁矿矿物的新型陶瓷辐射屏蔽性能的实验研究

在这项研究中，对掺杂了褐铁矿和赤铁矿矿物的新型陶瓷材料在伽马射线和中子屏蔽方面的有效性进行了开发和评估。主要目的是利用特定能级（81、160、223、302、356 和 383 千伏）的钡-133 放射性同位素发射的伽马光子能量，确定这些陶瓷的伽马射线屏蔽参数。测量使用堪培拉超 Ge 探测器检测辐射强度。实验和理论测定了质量衰减系数（μρ）、半值厚度（Δ0.5）、平均自由路径（λ）和有效原子序数（Zeff）。此外，还利用 EpiXS 程序测定了陶瓷在不同平均自由路径和光子能量下的暴露（EBF）和能量吸收（EABF）堆积因子值。同时，还计算了陶瓷的快中子衰减参数（ΣR）。陶瓷的密度随着褐铁矿和赤铁矿矿物的添加而增加，随着褐铁矿含量从 0 wt % 增加到 30 wt %，密度从 2.61 g/cm3 增加到 3.12 g/cm3。加入赤铁矿后也观察到类似的密度变化。陶瓷的密度与其屏蔽效果成正比关系。有效原子序数（Zeff）依次为 C < H1 < H2 < H3 < L1 < L2 < L3，这表明随着掺杂水平的提高，屏蔽效果也会提高。在所有测试样品中，L3 陶瓷（添加了 30% 的褐铁矿）样品的快中子去除截面值最高。研究结果表明，在陶瓷中掺入褐铁矿和赤铁矿矿物可提高陶瓷的密度，并显著改善陶瓷对伽马辐射和快中子的屏蔽能力。这表明，这种掺杂陶瓷可有效地应用于辐射防护领域。

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.