Title :
Fabrication of fine and homogeneous MgB2 nano powders by spray pyrolysis
Author :
Ko, Jae-Woong ; Yoo, Jaimoo ; Kim, Young-Kuk ; Chung, Kook-Chae ; Chung, Hyungsik ; Yoo, Sang-Im
Author_Institution :
Sch. of Mater. Sci. & Eng., Seoul Nat. Univ., South Korea
fDate :
6/1/2005 12:00:00 AM
Abstract :
Homogeneous nano-sized spherical MgB2 powders were fabricated by spray pyrolysis. The influence of solution concentration, furnace reaction temperature and mass flow of carrier gas on morphology and average particle size were investigated. MgB2 powders were synthesized with or without further heat treatment. For adequate preparation conditions, it has mostly spherical, solid and narrow particle size distribution. Average particle size (X50) distribution was below 100 nm. The critical temperature for the synthesized MgB2 was around 36 K.
Keywords :
annealing; flux pinning; grain boundaries; magnesium compounds; nanoparticles; particle size; powders; pyrolysis; superconducting transition temperature; type II superconductors; MgB2; average particle size; carrier gas; flux pinning; furnace reaction temperature; homogeneous MgB2 nano powders; mass flow; morphology; particle size distribution; solution concentration; spray pyrolysis; Critical current density; Fabrication; Grain boundaries; Heat treatment; High temperature superconductors; Materials science and technology; Powders; Spraying; Superconducting materials; Superconductivity; Flux pinning; spray pyrolysis;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.848889
