Nanocrystalline NbN powder was synthesized by the direct nitridation of amorphous Nb 2 O 5 powder with high BET surface area. X‐ray diffractometry analysis indicated that the cubic‐phase NbN powder could be obtained by nitridation at 650°–800°C for 3–8 h. Transmission electron microscopy images showed that the particle sizes were in the range of 15–40 nm. The effect of the nitridation temperature and holding time on the powder properties was discussed.
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Li et al. (2003) studied this question.
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