亚微米球Eu2O3/B4C/HDPE复合材料的制备及中子/伽马辐射屏蔽性能
张捷 , 霍志鹏 , 钟国强
高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (03) : 17 -26.
亚微米球Eu2O3/B4C/HDPE复合材料的制备及中子/伽马辐射屏蔽性能
Preparation and Neutron and Gamma Radiation Shielding Properties of Submicron Spheres Eu2O3/B4C/HDPE Composite
采用均相沉淀法合成了亚微米球Eu2O3(Eu2O3-S)填料, 将其与不规则形貌的商用Eu2O3(Eu2O3-C)填料以及PbO填料增强复合材料进行了对比研究. XRD测试结果表明, 合成的Eu2O3-S属立方晶系, 体心立方格子, Ia(206)空间群. SEM测试结果表明, 合成的Eu2O3-S填料为粒径均一的亚微米球, 而商用Eu2O3-C填料为不规则形貌的微米颗粒. 力学拉伸测试与DSC测试结果表明, 制备的Eu2O3-S/B4C/HDPE(HDPE=高密度聚乙烯)复合板材的屈服强度和抗拉强度分别为21.3 MPa与21.0 MPa, 熔融温度为119.7 ℃, 均强于商用Eu2O3-C/B4C/HDPE板材. 中子和伽马辐射屏蔽测试结果表明, 粒径均一的Eu2O3-S填料在HDPE基体中分散性最优, 能增强复合材料的屏蔽性能, 厚度为1.5 cm的板材具有最优的中子屏蔽率(43.66%), 其伽马射线屏蔽率为13.48%, 接近采用PbO填料的对比复合板材.
Submicron spherical Eu2O3(Eu2O3-S) filler was synthesized by homogeneous precipitation method, and a comparative study was conducted with commercial Eu2O3(Eu2O3-C) filler with irregular morphology and PbO filler reinforced composite materials. XRD tests show that the synthesized Eu2O3 filler(Eu2O3-S) is of cubic crystal system, body-centered cubic lattice, Ia(206) space group. SEM tests show that the synthetic Eu2O3-S filler has submicron spherical morphologies with uniform particle size, while the commercial Eu2O3-C filler has micron particles with irregular morphologies. Mechanical tensile tests and DSC tests show that the yield stress and tensile stress of the synthetic Eu2O3-S/B4C/HDPE(HDPE=high density polyetnylene) composite material are 21.3 MPa and 21.0 MPa, respectively, and the melting temperature is 119.7 ℃, all of which are higher than those of commercial Eu2O3-C/B4C/HDPE composite material. Neutron and gamma radiation shielding tests show that the Eu2O3-S filler with uniform particle size has the best dispersion in the HDPE matrix and can enhance the shielding rate of the composite material. The plate with a thickness of 1.5 cm has the best neutron shielding rate(43.66%), and its gamma shielding rate is 13.48%, which is close to the comparison composite material with Pb fillers.
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国家自然科学基金(12575224)
安徽省生态环境科研项目(2023hb0017)
安徽省高校协同创新项目(GXXT-2022-001)
中国聚变技术综合研究设施项目(2018-000052-73-01-001228)
合肥综合性国家科学中心能源研究院(安徽省能源实验室)项目(21KZL401)
合肥综合性国家科学中心能源研究院(安徽省能源实验室)项目(21KHH105)
合肥综合性国家科学中心能源研究院(安徽省能源实验室)项目(21KZS205)
合肥综合性国家科学中心能源研究院(安徽省能源实验室)项目(24JYZL01)
合肥综合性国家科学中心能源研究院(安徽省能源实验室)项目(24JYJB01)
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