Ｐｅｃｈｉｎｉ法制备Ｂｉ２Ｓｒ２ＣａＣｕ２Ｏ８＋δ粉体的工艺优化及表征

辽宁石油化工大学学报 ›› 2012, Vol. 32 ›› Issue (3): 17-20.

Ｐｅｃｈｉｎｉ法制备Ｂｉ_２Ｓｒ_２ＣａＣｕ_２Ｏ_８＋δ粉体的工艺优化及表征

腊　静^１，张　影^１＊，祁　阳^２

１．辽宁石油化工大学化学与材料科学学院，辽宁抚顺１１３００１；
２．东北大学理学院，辽宁沈阳１１０８１９

收稿日期:2012-03-07 出版日期:2012-09-20 发布日期:2017-07-06
作者简介:腊静（１９８６－），女，陕西西安市，在读硕士

Process Optimization and Characterization of Bi2Sr2CaCu2O8+δ Powder by Pechini Method

LA Jing¹， ZHANG Ying^1*, QI Yang²

1.School of Chemistry and Materials Science, Liaoning Shihua University, Fushun Liaoning 113001，P.R.China； 2. School of Science, Northeastern University, Shenyang Liaoning 110819, P.R.China

Received:2012-03-07 Published:2012-09-20 Online:2017-07-06

摘要/Abstract

摘要： 　以硝酸盐为原料，乙二胺四乙酸（ＥＤＴＡ）为络合剂，乙烯乙二醇为交联剂，利用Ｐｅｃｈｉｎｉ法制备了名义组分为Ｂｉ_２Ｓｒ_２ＣａＣｕ_２Ｏ_８＋δ（Ｂｉ－２２１２）超导粉体。通过Ｘ射线衍射（ＸＲＤ）、标准四引线法等手段，研究了络合剂、交联剂用量及油浴温度、时间对超导粉体物相、结晶性及电学性能的影响。实验结果表明：不同凝胶化条件制备的超导粉体，均保持较高的相纯度；但工艺参数的改变对Ｂｉ－２２１２粉体的结晶性与电学性能影响显著，其临界转变温度Ｔ_ｃ，０相差７．３Ｋ。

关键词: 　Ｂｉ－２２１２ , 　Ｐｅｃｈｉｎｉ法 , 　不同凝胶化过程 , 　结晶性 , 　电学性能

Abstract: The Bi2Sr2CaCu2O8+δ(Bi-2212) superconducting powders were synthesized by Pechini method. The samples were prepared with metal nitrates as starting materials, ethylene diamine tetracetic acid (EDTA) as chelating agent and ethylene glycol as cross-linking agent. The effect of EDTA amount, ethylene glycol amount, oil bath temperature and time during gel processes on the crystallnity and superconductivity of Bi-2212 powders were investigated. The X-ray diffraction (XRD) was employed to investigate the phase purity and crystallnity. The resistance measurements were carried out with a conventional four-probe method. The results showed that phase purity is slightly affected by different gel processes. But the crystallnity and electrical conductivity of Bi-2212 phase changes obviously as shown by the XRD patterns and R-T curves. The difference of its critical transition temperature Tc,0 is 7.3 K.

Key words: 　Bi-2212 , Pechini method , Different gel processes , Crystallinity , Electrical conductivity

腊　静，张　影，祁　阳. Ｐｅｃｈｉｎｉ法制备Ｂｉ_２Ｓｒ_２ＣａＣｕ_２Ｏ_８＋δ粉体的工艺优化及表征[J]. 辽宁石油化工大学学报, 2012, 32(3): 17-20.

LA Jing， ZHANG Ying, QI Yang. Process Optimization and Characterization of Bi2Sr2CaCu2O8+δ Powder by Pechini Method[J]. Journal of Liaoning Petrochemical University, 2012, 32(3): 17-20.