Effect of microstructure on properties of MgB2 synthesized by SHS method

✍ Scribed by K. Przybylski; J. Chmist; R. Zalecki; A. Kołodziejczyk

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 320 KB
• Volume: 408-410
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2004.02.063

✦ Synopsis

MgB 2 samples were obtained by self-propagating high-temperature synthesis (SHS). Microstructure, phase and chemical analysis of the samples were studied by XRD and cross-sectional TEM-SAD. MgB 2 samples contained very small uniformly distributed MgO particles. Temperature dependence of the upper critical field and of the critical current densities were determined from ac magnetic susceptibility measurements. Normal metallic state was characterised by measurements of valence band structure by ultraviolet photoelectron spectroscopy (ARUPS). We concluded that MgB 2 is a hard II type superconductor and that SHS method is suitable to fabricate material with strong pinning centers of MgO.