关键词: 氮化钛;纳米粉体;原位氮化;二氧化钛

Abstract: The TiN nanopowder was prepared by in-situ nitridation using TiO2 nanopowder as starting material. The crystalline characteristics, morphology and composition of the TiN nanopowders were investigated by XRD patterns, TEM and chemical analysis. The results indicate that TiN nanopowders are obtained with an average diameter of about 40nm and 80nm by nitridation at 1000℃ and 1100℃ for 5h respectively, and their contents of TiN are 95.40; and 98.37;. When nitridation time reduced to 2h at 1000℃ the content of TiN is only 58.36;. The results reveal that the nitridation temperature and time play important roles on synthesizing the TiN nanopowders. The higher temperature and longer nitridation time are beneficial to form the high purity titanium nitride powders, and prolonging nitridation time is more beneficial to obtain high purity particles with a smaller diameter compared with elevating temperature.