MgB2-BASED SUPERCONDUCTOR WITH HIGH CRITICAL CURRENT DENSITY AND HIGH IRREVERSIBLE MAGNETIC FIELD

摘要

PPROBLEM TO BE SOLVED: To provide an MgBSB2/SB-based superconductor with high critical current density and high irreversible magnetic field. PSOLUTION: This MgBSB2/SB-based superconductor is produced by forming a mixture of powders such as Mg powder, B powder, element M powder and sintering it (wherein, M is at least one kind selected among Ti, Zr and Hf). The atomic ratio is denoted as Mg:B:M=1:2:x (wherein, 0.001x0.1). M exists to be finely dispersed as a metal and/or a boride along the grain boundaries of MgBSB2/SBand other inevitable impurities exist to be finely dispersed. PCOPYRIGHT: (C)2005,JPO&NCIPI