Sol-gel法合成Bi_(1.6)Pb_(0.3)Sb_(0.1)Sr_2Ca_2Cu_3O_x体系的超导材料的研究

The Research about Superconductor Which Use Sol gel Method Prepare Bi 1.6 Pb 0.3 Sb 0.1 Sr 2Ca 2 Cu 3O x System

本文用Ｓｏｌ－ｇｅｌ法合成了Ｂｉ１．６Ｐｂ０．３Ｓｂ０．１Ｓｒ２Ｃａ２Ｃｕ３Ｏｘ体系的高ＴＣ超导原粉，对于不同的烧结时间，材料的超导性有不同程度的差异，（超导转变温度为１０８．３～１１６．１Ｋ）并与同种方法合成的Ｂｉ１．７Ｐｂ０．３Ｓｒ２Ｃａ２Ｃｕ３Ｏｘ体系进行了比较．用Ｓｏｌ－ｇｅｌ法，在Ｂｉ系中掺杂Ｐｂ，同样会缩短烧结时间（缩短６０ｈ），促进高温相的形成，同时掺杂Ｐｂ，Ｓｂ，形成超导材料所需的烧结时间进一步缩短（缩短１５３ｈ）．利用ＳＥＭ和Ｘ－ｒａｙ观察和分析了样品的形貌特征和物相结构．Ｓｏｌ－ｇｅｌ法具有工艺简单，烧结时间短，样品颗粒均匀、粒度小、组分易控等优点，在高ＴＣ超导材料中不失为一种行之有效的材料制备工艺．

High T C Superconductor primitive powder Bi 1.6 Pb 0.3 Sb 0.1 Sr 2Ca 2 Cu 3O x is prepared by Sol gel process.In different sintering time,it shows different superconductors transition T C (108.3～116.1K).It is compared with Bi 1.7 Pb 0.3 Sr 2Ca 2 Cu 3O x system in the same method prepared similarly.It can shorten sintering time (shorten 60h) using sol gel method if Pb is doped into Bi system, and promote high T C phase's form.If we doped Pb and Sb in Bi-2223 system,sintering time what forming the superconductivity materials need goes a step further to shorten (shorten 153h). Using X ray analyses sample's structure.The Sol gel method can simplify the working process,shorten sintering time,uniform grains and small volume of the sample.Chemical composition is easy to control.Our study shows that Sol gel technology is effective on the process of superconductor material made.