Synthesis and characterization of tantalum nitride nanopowder prepared through homogeneous reaction

摘要

Tantalum nitride powders with particle size of 20.50 nm were prepared by the homogeneous reduction in liquid ammonia,and were treated at the temperature range from 500 °C to 1 170 °C.The results of XRD analysis indicate that the powders heated up to 500 °C are in the form of amorphous.The powder heated at 600 °C tends to transform into crystal,the powder heated to temperatures higher than 700 °C is clearly of crystal.The results of surface area analysis by BET show that the surface area of the powder increases as the heating temperature increases,and reaches a maximum value of 21.8 m2/g at the heating temperature around 700 °C.