用溶胶凝胶法合成的纳米TiO2粉体作为原料,将该粉体在氨气中进行原位氮化制备了TiN纳米粉体.用XRD,TEM,化学分析等手段对合成的TiN纳米粉体的物相组成、形貌、成分进行了分析.实验分析表明:在1000℃和1100℃下分别氮化5h,可以制备粒径大约为40nm和80nm的TiN粉体,其TiN的含量分别为95.40%和98.37%;而在1000℃条件下氮化时间减少到2h时,TiN的含量仅为58.36%.氮化温度和氮化时间是合成纳米TiN的重要因素,提高合成温度和延长氮化时间均可形成纯度较高的TiN纳米粉体,但延长氮化时间更有利于获得粒径小的氮化钛粉体.
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.
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