Abstract: The B i 2S r 2C a( C u 1-xMn x) 2O8+δ( x=0、 0. 0 1、 0. 0 2、 0. 0 3)  polycrystalline powders were synthesized by Pechini type solgel method. The changes in structure and electrical properties of B i 2S r 2C a C u 2O8+( abbrev. Bi2212) after Mn doping were investigated. Xray diffraction (XRD) and Fourier Transform Infrared (FT-IR) were employed to investigate the structural change of the samples. Conventional fourprobe method was used to study the electrical properties of samples. The results show that no secondphase diffraction peaks were detected except Bi2212 peaks. The lattice parameters of Bi2212 crystalline were changing with different Mn doping concentration. And the superconducting transition temperature of Bi2212 phase was decreased by about 11 K due to the Mn element introduction into Bi2212 lattice. 

Key words: Bi2212, Pechini type sol gel method, Mn doping, Crystallity, Superconductivity

摘要： 采用P e c h i n i型溶胶 - 凝胶法制备了B i 2S r 2C a( C u 1-xMn x) 2O8+δ( x=0、 0. 0 1、 0. 0 2、 0. 0 3) 多晶粉体, 研究了 Mn掺杂对B i 2S r 2C a C u 2O8+( 简称为B i 2 2 1 2) 相的结构和电学性能的影响。利用X射线衍射( XR D) 、 傅里叶红外光谱( F T - I R) 对B i 2 2 1 2相进行结构分析, 利用标准四引线法分析了电阻随温度的变化情况, 分析 Mn掺杂对B i 2 2 1 2相电学性能的影响。结果表明, Mn元素进入了超导相晶格中, 并引起晶格常数发生变化, Mn掺杂使B i 2 2 1 2相超导转变温度降低了1 1K。

关键词:  B i 2 2 1 2, P e c h i n i型溶胶-凝胶法, Mn掺杂, 结晶性, 超导电性