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用氨解H_2[TiO(C_2O_4)_2]前驱体的方法成功制备出了纳米TiN粉体。通过X射线衍射分析了氨解温度和时间对氮化钛形成的影响以及形成机理。用透射电镜和扫描电子显微镜观察了氮化钛粉体的形貌和粒径。结果表明:1050℃氨解H_2[TiO(C_2O_4)_2]_2h所得纳米TiN粉体呈颗粒状,平均粒径约70nm,粒径大小较均匀。750℃H_2[TiO(C_2O_4)_2]氨解时形成TiO_2和TiO,随氨解温度升高和时间延长,最后形成立方相TiN。提高氨解温度有利于前驱体的氨解,并可缩短TiN的形成时间。
The nano-TiN powder was successfully prepared by ammonolysis of H_2 [TiO (C_2O_4) _2] precursor. The influence of ammonolysis temperature and time on the formation of TiN and the formation mechanism were analyzed by X-ray diffraction. The morphology and particle size of titanium nitride powder were observed by transmission electron microscopy and scanning electron microscopy. The results show that the nano - sized TiN powder obtained by ammonolysis of H_2 [TiO (C_2O_4) _2] _2h at 1050 ℃ has a granular shape with an average particle size of about 70 nm and a uniform particle size. The formation of TiO 2 and TiO at the solution of H_2 [TiO (C_2O_4) _2] at 750 ℃ and finally the formation of cubic phase TiN with the increase of the ammonolysis temperature and the prolongation of time. Increasing the ammonolysis temperature favors the ammonolysis of the precursor and shortens the TiN formation time.