US EPA

4846377 

Journal Article 

PREPARATION OF FLUXIBLE Mo PARTICLES BY HYDROGEN PLASMA 

Jin, C; Cao, W; Jun, D; Wang, W 

2017 

Yes 

Digest Journal of Nanomaterials and Biostructures
ISSN: 1842-3582 

12 

2 

319-324 

WOS:000402649700010 

The molybdenum flexible powder were prepared by radio frequency(RF) plasma using irregular molybdenum powder as precursor, plasma process parameters were optimized The effects of the carrier gas flow rate and molybdenum powder feeding rate on the shape and size of the final products were studied. The morphology of molybdenum powder was observed by high resolution scanning electron microscopy. The powder phases were analyzed by X-ray diffraction. The tap density and apparent density of molybdenum powder were investigated by the Hall flow meter and the Scott volumeter. The optimal process parameters for the spherical molybdenum powders preparation are: 50 g/min powder feeding rate and 0.6 m(3)/h the carrier gas rate. At the same time, pure spherical molybdenum powders can be obtained from irregular powder, and the tap density is enhanced after plasma processing. The average size is reduced from 72 gm to 62 gm and the tap density is increased from 2.7 g/cm(3) to 6.2 g/cm(3). Thus, RF plasma is a promising method for preparation of spherical powders with high density and purity. 

Radio frequency plasma; Molybdenum powder; Spheroidization; Processing parameters