Bi_(1.7)Pb_(0.3)Sr_2Ca_2Cu_3O_(10)多晶制备工艺对其电学性能影响的研究  

Study on the Effect of Preparation Process on the Electrical Properties of Bi_(1.7)Pb_(0.3)Sr_2Ca_2Cu_3O_(10) Polycrystalline

作　　者：李东麒 陈清明[1] 高翔 杨盛安 张辉[1] 杨宁[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]中国科学院大学,北京101408

出　　处：《人工晶体学报》2015年第8期2284-2289,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金重点项目(50902062);昆明理工大学省级人才培养项目(KKSY201451080)

摘　　要：采用溶胶-凝胶法成功制备了Bi1.7Pb0.3Sr2Ca2Cu3O10（BPSCCO）粉末,通过优化制备工艺获得了电学性能优良,转变温度在114 K左右的Bi1.7Pb0.3Sr2Ca2Cu3O10多晶靶材。利用X射线衍射仪测试了样品的物相和结构,并利用四探针法测试了靶材的电阻-温度曲线。对比了不同螯合剂对溶胶-凝胶法制备BPSCCO多晶的影响,发现以葡萄糖酸为螯合剂克服了传统工艺周期长、pH难调控的缺点。在此基础上,探究了热处理工艺对Bi1.7Pb0.3Sr2Ca2Cu3O10多晶电学性能的影响,得到了其最适预烧温度（600~700℃）、烧结温度（820~830℃）及烧结时间（48 h）。Bi1.7Pb0. 3Sr2Ca2Cu3O10 powder was prepared by sol-gel method,and electrical properties wtih Tc around 144 K were acquired by optimizing the preparation process. The crystalline structure of the samples was investigated by X-ray diffraction（ XRD） and the temperature dependence of resistance was measured using the standard four-probe method. A systematic comparison study of Bi1.7Pb0. 3Sr2Ca2Cu3O10 polycrystalline prepared by different chelating agents was accomplished. The results show that when glucose acid（ GA） was employed as chelating agent,the preparation period of the polycrystalline was largely shortened compared with the conventional sol-gel process. Further, the influence of heat treatment procedure on the Bi1. 7Pb0. 3Sr2Ca2Cu3O10 polycrystalline was also investigated for the optimal calcination temperature（ 600-700 ℃）,sintering temperature（ 820-830 ℃） and sintering time（ 48 h）.

关 键 词：Bi1.7Pb0.3Sr2Ca2Cu3O10 螯合剂 溶胶-凝胶法 热处理工艺 

分 类 号：TQ174[化学工程—陶瓷工业] TM26[化学工程—硅酸盐工业]