软模板法制备超细钨酸铅  

Synthesis of ultra-fine PbWO_4 by soft template method

作　　者：杜利成[1] 周元林[2] 宋开平[2] 

机构地区：[1]西南科技大学分析测试中心,四川绵阳621010 [2]西南科技大学材料学院,四川绵阳621010

出　　处：《计算机与应用化学》2010年第6期739-742,共4页Computers and Applied Chemistry

基　　金：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)

摘　　要：钨酸铅集中了钨和铅的抗辐射特性,制造粒径超细的钨酸铅以提高其防辐射的能力很有特色。钨酸铅的粒度大小直接影响它对放射性物质的防护能力,粒度越小分散越均匀的钨酸铅,防护能力越好。软摸板合成法研究超细PbWO_4的制备,严格的实验条件,是保证获得超细、均匀的钨酸铅的重要途径,优于其他物理和化学制备方法。以表面活性剂作软摸板,用S-60为水体系的W/O微乳液区成功地合成了超细PbWO_4。实验结果证明,以S-60为分散剂的软摸板制备的超细PbWO_4,粒度分布均匀,采用正交实验法创造最佳实验条件:以S-60为表面活性剂,分散剂浓度为稀释30倍,溶液pH值为9,反应物浓度为0.01 mol/L,搅拌速率1300 rpm,Pb(Ac)_2溶液缓慢滴加到Na_2WO_4溶液中,得到超细的目标产物,用于防辐射的填料。Lead tungstate combines the anti-radiation propertie of tungsten and lead,and manufacturing ultra-fine granularity lead tungstate to enhance its capacity to radiation is quite distinctive.The grain size of lead tungstate has direct impact on the ability of its protection from radioactive materials,with smaller the grain size and more uniform dispersion of lead tungstate,the better protective ability it going to be.In this paper,soft-template synthesis was introduced to prepare ultra-fine PbWO4.Rigorous experiment conditions are settled to ensure access to ultra-fine,homogeneous lead tungstate product better than other physical and chemical preparation methods.The surface-active agent for the soft template,with the S-60 for the water system W/O microemulsion zone successfully synthesized ultra-fine PbWO4.Results show that dispersing agent S-60 in the soft template method produced ultra-fine PbWO4 with uniform granularity distribution.While using orthogonal experimental method to create the best experimental conditions：the S-60 as surfactant dispersant in diluted 30 times concentration,pH=9,the concentration of reactant was 0.01 mol/L, stirring speed at 1 300 rpm and slowly add drops of Na2WO4 solution into Pb（Ac）2 solution.Then the product of ultra-fine product for the anti-radiation protection filler has been made.

关 键 词：软模板法 钨酸铅 粒度 

分 类 号：V512.3[航空宇航科学与技术—航空宇航推进理论与工程]