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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 10 0 0℃和 110 0℃下分别氮化 5h ,可以制备粒径大约为 4 0nm和 80nm的TiN粉体 ,其TiN的含量分别为 95 .4 0 %和 98.37% ;而在 10 0 0℃条件下氮化时间减少到 2h时 ,TiN的含量仅为 5 8.36 %。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 nano-TiO2 powder synthesized by sol-gel method was used as raw material, and then the powder was in situ nitrided in ammonia to prepare TiN nano-powder. The phase composition, morphology and composition of the synthesized TiN nano-powders were analyzed by XRD, TEM and chemical analysis. The experimental results show that TiN powders with particle sizes of about 40nm and 80nm can be prepared by nitriding at 100 ℃ and 110 ℃ for 5h respectively, and the content of TiN is 95.4% and 98.37% When the nitriding time was reduced to 2h at 100 ℃, the content of TiN was only 5 8.36%. Nitridation temperature and nitridation time are important factors for the synthesis of nano-TiN. Increasing the synthesis temperature and prolonging the nitriding time can form high-purity TiN nano-powders. However, prolonging the nitriding time is more conducive to obtain the smaller size of nitriding Titanium powder.