含硼矿物复合材料对1keV,1eV及0.0253eV能量中子的屏蔽性能  

Shielding Properties of Boron-Containing Ores Composites for 1 keV,1 eV and 0.025 3 eV Neutron

作　　者：李哲夫[1,2] 薛向欣[1,2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819 [2]辽宁省高校硼资源生态化综合利用技术与硼材料重点实验室,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第12期1716-1720,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50774022)

摘　　要：以我国辽宁东部地区特有的硼铁矿原矿石、含硼铁精矿、富硼渣为原料,用蒙特卡罗方法研究了不同配比含硼矿物/环氧树脂复合材料对1 keV,1 eV,0.025 3 eV能量慢中子的屏蔽性能及影响因素,并与普通混凝土屏蔽材料进行了对比.结果表明:复合材料对1 keV中子的屏蔽性能随着氢元素质量分数的增加而增加;复合矿物材料对1 eV中子的屏蔽性能主要与复合材料中硼元素的质量分数及氢、硼元素的配比有关;硼元素质量分数是影响0.025 3 eV中子屏蔽性能的主要因素.各配比组成复合屏蔽材料对慢中子的屏蔽性能均强于普通混凝土,有望提高普通混凝土生物防护层对慢中子的防护性能,并为慢中子的屏蔽设计提供依据.Boron-containing green ore in the eastern area of Liaoning Province of China,boron-containing iron ore concentrate and boron-rich slag were used as starting materials to prepare boron-containing composites.Monte-Carlo method was used to study the shielding properties of boron-containing ore/epoxy composites with different proportions for slow neutrons of 1 keV,1 eV,0.025 3 eV energy respectively and the factors that affect the shielding abilities,and comparison with shielding materials of Portland cement concrete was also conducted.The results show that the shielding properties of the composites for 1 keV neutron increase with the increase of hydrogen content in the composites.The shielding performance of the composites for 1eV neutron is mainly related to boron content and the ratio of boron to hydrogen in the mixture.Boron content is the main factor that affects the shielding properties for 0.025 3 eV neutron.The slow neutron shielding properties of all composites are stronger than Portland cement concrete and the boron-containing ore/epoxy composites are expected to improve the shielding properties of Portland cement concrete.This may provide the basis for the design of slow-neutron shielding.

关 键 词：含硼矿物复合材料 慢中子 屏蔽性能 蒙特卡罗方法 普通混凝土 

分 类 号：X34[环境科学与工程—环境工程] X946