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《Radiation Protection》 2012-03
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Study on Preparation of Ultrafine Lead Tungstate for Radiation Protection and γ-ray Shielding of the Gloves

Du Licheng 1,He Ping 1,Zhou Yuanlin 1,Song Kaiping 1,Yang Kuihua 2(1.College of Materials Science and Engineering,Southwest University of Science and Technology,Sichuan Mianyang 621010;2.School of Chemistry and Chemical Engineering,Mianyang Normal University,Sichuan Mianyang 621000)  
Lead tungstate combines the radiation shielding properties of tungsten and lead,and it is quite distinctive to manufacture lead tungstate with ultra-fine granularity to enhance its capacity of radiation shielding.The grain size of lead tungstate has direct impact on the ability of its protection from radioactive materials.the smaller the grain size and more uniform dispersion of lead tungstate,the better protective ability it is going to be.In this paper,soft-template synthesis was introduced to prepare ultra-fine PbWO 4.Rigorous experiment conditions are settled to ensure the access to obtain ultra-fine,homogeneous lead tungstate product,and it is better than other physical and chemical preparation methods.The surface-active agent for the soft template,with S-60 for the water system W/O microemulsion zone,was used to synthesize successfully ultra-fine PbWO 4.It was shown that dispersing agent S-60 in the soft template method produced ultra-fine PbWO 4 with uniform granularity distribution.By using orthogonal experimental method,the best experimental conditions were obtained as follows: S-60 as surfactant dispersant with diluted 30 times concentration,solutions with pH9,0.01 mol/L concentration of reactant,1 300 rpm of stirring speed and slowly adding drops of Na 2 WO 4 solution into Pb(Ac) 2 solution.Based on the optimal experimental conditions,the product of ultra-fine product for the anti-radiation protection filler has been made.The fine packing for the preparation of tungsten the gamma rays on the gloves is an average capacity of 5% or so.
【Fund】: 国防科工委资助课题“高性能射线防护材料研制”(编号:JPPT-115-2-1081)
【CateGory Index】: TL344
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