Particle Formation by CO₂ Laser-Induced Breakdown (III) The Formation of Mo and MoS₂ Fine Powders from Mo (CO)₆

Abstract

Fine powdered Mo and MoS₂ were synthesized in vapor phase reactions by a TEA-CO₂laser-induced breakdown technique. Molybdenum particles were prepared from Mo (CO)₆; molybdenum sulfide particles were prepared from a mixture of Mo (CO)₆ and CS₂. The particulatem aterials were characterized by scanning electron microscopy, ICP ctomic emission spectroscopy, and X-ray diffraction. The particles are monodispersed, neafly sphedcal, and 0.05-0.4μm indiameter. An X-ray diffraction study indicates that the Mo particle is crystalline and MoS₂particle is amorphous. The yield of the Mo particle increased linearly with increasing laser pulseenergy.