Comparative study of Bi-2223/Ag superconductors derived from particles size of starting materials

被引：1

作者：

Sykorova, D. ^{[1
]}

Smrckova, O. ^{[1
]}

Rubesova, K. ^{[1
]}

Vasek, P. ^{[2
]}

机构：

[1] Prague Inst Chem Technol, CR-16628 Prague 6, Czech Republic

[2] Inst Phys ASCR, Prague 16253 6, Czech Republic

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2007年 / 21卷 / 18-19期

关键词：

microstructure; Ag-addition; sol-gel method;

D O I：

10.1142/S0217979207044299

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Series of the samples with nominal compositions Bi3.2Pb0.8Sr4Ca5Cu7Ox and Bi3.2Pb0.8Sr4Ca5Cu7Ox/Ag (10 wt%) were prepared by the standard solid state reaction at the same calcination and sintering temperature and time. Three starting mixtures were used, carbonates, oxides and silver i) with nanoparticles, ii) with micrometer size of particles and iii) powder obtained by modified sol-gel process. The main phase in all samples was Bi-2223 and silver formed the separate phase. The sol-gel process was found to be effective way in term of porosity, bulk density and connectivity of the grains. The effect of the microstructure on the transport properties were described by the temperature dependence of resistivity and critical current densities.

引用

页码：3246 / 3249

页数：4