“…Srivatsan et al, showed that the densification of Mo nanopowders (100 nm) using plasma pressure compaction method resulted in grain size of 1 μm-3 μm with 97% relative density. Apparently, only Park et al [5], obtained the Mo compact with ultra-fine 500 nm grain size with 90% relative density using a two-step sintering method with 20 h holding time. Also, the description of the fabrication of the Mo mirrors by the sintering route tested for reflectivity is limited in the literature [4,6,7].…”