Effect of addition of nanoparticle TiO2/SiO2 on the superconducting properties of MgB2

Authors

S X. Dou, University of WollongongFollow
Yun Zhang, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow
Sihai Zhou, University of WollongongFollow

RIS ID

24536

Publication Details

Zhang, Y, Zhou, SH, Wang, X & Dou, SX (2008), Effect of addition of nanoparticle TiO2/SiO2 on the superconducting properties of MgB2, Physica C: Superconductivity and its Applications, 468(15-20), pp. 1383-1386.

Abstract

In this paper, bulk MgB₂ was prepared by doping with nanoparticle TiO₂ surface-modified by 5-10% SiO₂. The doping ratio of TiO₂/SiO₂ to MgB₂was 0, 5, 10, and 15 wt%. The sintering temperature varied from 650^°C to 950^°C. Quantitative X-ray diffraction (XRD) analysis was performed to obtain the lattice constants and the weight fraction of impurities using the Rietveld method. It was found that the critival temperature (T_c) increases with the lattice constants. The critical current density (J_c) is affected by the doping ratio and the sintering temperature. The J_cexhibited the highest value at the doping ratio of 10 wt% for 5 K and 20 K and at the doping ratio was fixed at 5 wt%, the samples with the sintering temperature of 750^°C had the best J_cfor 5 K and 20 K, while the sample with the sintering temperature of 850^°C exhibited the highest J_c at 30 K.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205