Title :
Thermal Analysis of MgB2 Formation
Author :
Bohnenstiehl, S. ; Dregia, S.A. ; Sumption, M.D. ; Collings, E.W.
Author_Institution :
Ohio State Univ., Columbus
fDate :
6/1/2007 12:00:00 AM
Abstract :
Differential scanning calorimetry (DSC) was used to study the formation of MgB2 from amorphous boron powder and MgH2/Mg powder. The B and powder mixture demonstrated that forms near 600degC with an estimated activation energy of 239 kJ/mole. The B and Mg powder mixture has an additional low temperature reaction near 425degC that is initiated by Mg(OH)2 decomposition. Similar effects can be duplicated with the hydride powder via moisture contamination.
Keywords :
differential scanning calorimetry; magnesium compounds; materials preparation; powders; pyrolysis; superconducting materials; MgB2; activation energy; amorphous boron powder; decomposition; differential scanning calorimetry; powder mixture; thermal analysis; Amorphous materials; Boron; Calibration; Calorimetry; Contamination; Iron; Moisture; Powders; Superconducting materials; Temperature sensors; Magnesium diboride; superconductor; thermal analysis;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.897932
