Chemical Properties
gray metallic appearance; can be obtained by reduction of Nb2O5 in H2 at 1300°C–1700°C; -100 mesh with 99.9% purity; cub, a=0.42108nm; enthalpy of fusion 85.00kJ/mol [CRC10] [CER91] [KIR81]
Preparation
A mixture of NbO2 and Nb metal is pulverized to as small a
size as possible and then compressed into small pellets which are
heated for 10-20 minutes at 1600-1700°C in an atmosphere of
very pure Ar or in a high vacuum. The best support for these
pellets is Nb sheet; however, the pellets should touch this sheet
only at a very few points.
Flammability and Explosibility
Not classified
