超声法制备金掺杂的纳米YBa_2Cu_3O_7材料研究  

Preparation of YBCO with nano-Au-doping by ultrasonic process

作　　者：林珊[1] 陈淑卿[2,3] 章文贡[2] 陈礼辉[1] 

机构地区：[1]福建农林大学材料工程学院,福州350002 [2]福建师范大学化学与材料学院,福州350007 [3]中国石油四川石化有限责任公司,成都611930

出　　处：《华中师范大学学报（自然科学版）》2011年第1期79-83,共5页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金资助项目(30671637);福建省纳米重大专项资助项目(2005HZ01-5);福建省自然科学基金资助项目(2010J01271);福建省生物质材料工程技术研究中心建设项目(2008H2002)

摘　　要：将高温固相法制得的YBCO研磨,于无水乙醇中进行超声分散获得纳米YBCO/乙醇溶胶,随后掺入纳米金溶胶,浓缩、干燥得金掺杂的YBCO材料.结果发现,纳米金掺杂的YBCO/乙醇溶胶中粒子形成纳米链;掺杂适量金提高了YBCO的晶化程度;掺金量为0.025wt%～0.500wt%时,金/YBCO材料的超导转变温度T_e为93.84～92.01 K,但掺杂1%的金时,样品超导性能消失.若能进一步控制好掺金量,金掺杂YBCO的T_e也会相应得到提高.YBCO bulk material by high temperature solid state reaction was milled and dispersed by ultrasonic process in alcohol solvent and nanoscale YBCO/alcohol sot was obtained. Then it was mixed with nano-Au sol and YBCO doped with Au materials were prepared after concentration and drying. The results show that the nanoparticles form nano chain in YBCO / ethanol sol doped with nano-Au. The degree of crystallization of YBCO is increased by doping with an appropriate amount of Au. Doped with 0. 025%～0. 500% by weight percentage of Au, the Tc of Au/YBCO materials are 93.84～92.01 K, but the superconductivity disappear with 1% of Au. The Tc YBCO doped with Au will be improved accordingly if the amount of Au can be further controlled.

关 键 词：超声 金 YBCO 掺杂 

分 类 号：TM26[一般工业技术—材料科学与工程]