新型溶胶-凝胶法制备CoPd合金纳米颗粒及其磁性能表征  

Characterization of Magnetic Properties of CoPd Alloy Nanoparticles Synthesized via a Novel Sol-Gel Process

作　　者：许连强 唐志雄 唐少龙 都有为[2] XU Lianqiang;TANG Zhixiong;TANG Shaolong;DU Youwei(School of Physics and Electronic Information Engineering, Engineering Research Center of Nanostructure and FunctionalMaterials, Ningxia Normal University, Guyuan 756000;Jiangsu Key Laboratory for Nanotechnology, CollaborativeInnovation Center of Advanced Microstructures, Nanjing National Laboratory of Microstructures, School of Physics,Nanjing University, Nanjing 210093)

机构地区：[1]宁夏师范学院物理与电子信息工程学院、纳米结构及功能材料工程技术研究中心,固原756000 [2]南京大学物理学院,江苏省纳米技术重点实验室、人工微结构科学与技术协同创新中心、南京微结构国家实验室,南京210093

出　　处：《材料导报》2018年第10期1587-1591,共5页Materials Reports

基　　金：国家重点基础研究发展计划(2012CB932304); 国家自然科学基金(U1232210;11374146); 宁夏自然科学基金(NZ15262); 宁夏高等学校科学研究项目(宁教高[2014]222号文件); 宁夏师范学院重点科学研究项目(NXSFZD1511)

摘　　要：通过对一种新颖的溶胶-凝胶技术进行改进,在不借助氢气还原的条件下,成功制备了面心立方相CoPd合金纳米颗粒,并使用X射线衍射仪(XRD)和高分辨透射电子显微镜(HRTEM)对CoPd合金纳米颗粒进行了表征。分析结果显示:CoPd合金纳米颗粒的晶粒尺寸介于4~12nm之间,平均约为9nm;其在室温下展示出超顺磁性,阻塞温度为250K。这项新颖的溶胶-凝胶技术在合成纳米合金颗粒方面具有应用潜力。The present work improved a novel sol-gel process,and made a successful attempt to prepare CoPd alloy nanoparticles by means of this facile one-pot reaction without H2 reduction.The formation of face-centered cubic（fcc）CoPd nanoalloy nanoparticles were confirmed by the examinations of X-ray diffraction（XRD）and high-resolution transmission electron microscopy（HRTEM）.The analyses show that the grain sizes of the synthesized nanoparticles range from 4 nm to 12 nm with average about 9 nm,and the synthesized nanoparticles exhibit typical superparamagnetic behavior at 300 Kalong with a blocking temperature at 250 K.This novel silica sol-gel strategy is expected to display potential application in preparing other nanoalloy nanoparticles.

关 键 词：CoPd合金 纳米颗粒 溶胶-凝胶法 超顺磁性 

分 类 号：O482.54[一般工业技术—材料科学与工程] O482.522[理学—固体物理]