第36卷第1期2023年2月同位素JournalofIsotopesVol.36No.1Feb.2023不同形貌钨酸铋对γ射线的屏蔽性能研究李涌1,2,王国伟1,吴正新1,张海涛1,刘国卿1(1.深圳大学物理与光电工程学院,广东深圳518060;2.深圳市计量质量检测研究院,广东深圳518072)摘要:为制备性能优良的辐射防护材料,通过水热法合成钨酸铋(Bi2WO6)纳米晶体,并制得水性聚氨酯基-钨酸铋复合材料,研究钨酸铋的晶体结构和形貌对其γ射线屏蔽性能的影响。结果表明,前驱体溶液pH对钨酸铋的合成影响显著,酸性和中性条件下生成正交相钨酸铋,强碱条件下则为四方相钨酸铋(Bi0.875W0.125O1.6875);随着前驱体溶液pH增加,钨酸铋晶体形貌由花状微球逐渐过渡到柿饼状,再转变为随机堆积的纳米片。正交相柿饼状钨酸铋对81keVγ射线的屏蔽效果较佳,而四方相钨酸铋则对59.5和121.8keVγ射线的屏蔽效果更佳;另外,不同晶相钨酸铋制得的复合材料力学性能差异明显。研究结果可为无毒、质轻、高效的新型γ射线屏蔽材料的开发提供参考。关键词:钨酸铋;水热法;γ射线屏蔽中图分类号:TL71文献标志码:A文章编号:1000-7512(2023)01-0009-06收稿日期:2021-08-02;修回日期:2021-10-16基金项目:深圳市科技创新委技术攻关重点项目(JSGG20210713091539014)通信作者:刘国卿doi:10.7538/tws.2021.youxian.061StudyonGammaRayShieldingPropertiesofBismuthTungstatewithDifferentMorphologiesLIYong1,2,WANGGuowei1,WUZhengxin1,ZHANGHaitao1,LIUGuoqing1(1.CollegeofPhysicsandOptoelectronicEngineering,ShenzhenUniversity,Shenzhen518060,China;2.ShenzhenAcademyofMetrology&QualityInspection,Shenzhen518072,China)Abstract:Toprepareexcellentradiationprotectionmaterial,bismuthtungstatenano-crystalsweresynthesizedbyhydrothermalmethod,andpolyurethanebasedbismuthtungstatecompositeswereprepared.Theeffectsofcrystalstructureandmorphologyonthegammarayshieldingpropertiesofbismuthtungstatewerestudied.Theresultsindi-catedthatthepHvalueofprecursorsolutionhadalargeeffectonthesynthesisofbismuthtungstate,orthorhombicBi2WO6wereobtainedunderacidicandneutralcondi-tions,andtetragonalBi0.875W0.125O1.6875wereobtainedunderstrongalkalicondition.WiththeincreaseofpHvalue,themorphologyofbismuthtungstatechangedfromflow-erlikemicrospherestopersimmonlikemicrostructures,andthentorandomly...
