摘要
研究埋炭气氛下在熔盐(NaCl))浴中利用TiO2(锐钛矿)和炭黑合成Ti(C,N)粉末。运用热力学计算对反应过程进行分析,借助S射线衍射(XRD)、扫描电镜(SEM)和电子探针(EPMA)等手段对合成粉末进行分析,并对反应过程中可能发生的反应机理进行探讨。结果表明,NaCl对合成Ti(C,N)粉末有明显的促进作用;合成的Ti(C,N)平均粒度为2~6μm,且形状规则,颗粒间团聚较小;Ti(C,N)的形成过程为:TiO2→Ti4O7→Ti3O5→TiOxNy→Ti(C,N)。
In the presence of CO and N2 atmospheres, Ti(C,N) powder was successfully synthesized in the molten NaCl bath with anatase and carbon black as raw materials. Thermodynamic calculation was employed to study the reaction process. The reaction products obtained were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron probe microanalysis (EPMA). The possible mechanism in the process was discussed. The results indicate that: molten salt, NaCl, plays a dominant role in the Ti(C,N) formation; the average particle size of Ti(C,N) prepared is a bout 2~6μm and of uniform shape and less agglomeration. The formation of Ti(C,N) can be described as follows: TiO2→Ti4O2→Ti3O5→TiOxNy→Ti(C,N).
出处
《武汉科技大学学报》
CAS
2008年第3期255-259,共5页
Journal of Wuhan University of Science and Technology
基金
湖北省自然科学基金资助项目(2007ABA372)
关键词
熔盐
TI(C
N)
碳热还原
molten salt
titanium carbonitride
carbothermal reduction