Fabrication of fine and homogeneous MgB/sub 2/ nano powders by spray pyrolysis

Homogeneous nano-sized spherical MgB/sub 2/ 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. MgB/sub 2/ 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 (X/sub 50/) distribution was below 100 nm. The critical temperature for the synthesized MgB/sub 2/ was around 36 K.