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采用热重分析和恒温实验法研究了攀枝花钛精粉氧化过程中相的存在形式及其转变规律.X射线衍射结果和微观形貌分析表明:温度低于500℃,钛精粉未发生氧化反应;600℃时产生Fe2Ti3O9和TiO2相,其和原相Fe2O3相衍射峰强度均随温度的升高而增强;900℃时,Fe2Ti3O9相完全转变为Fe2TiO5相,且随温度的升高,TiO2相和Fe2O3相衍射峰强度逐渐减弱;在整个氧化过程中存在四个化学反应,其与烧结作用相互关联,使得氧化产物表面形成较多孔隙,变得凹凸不平且疏松.
Thermogravimetric analysis and thermostatic experiments were used to study the existence and transformation of the phase in the oxidation process of titanium powder in Panzhihua.The results of X-ray diffraction and micro-morphology showed that the oxidation of titanium powder did not occur when the temperature was below 500 ℃ . The diffraction peak intensity of Fe2Ti3O9 and TiO2 phase at 600 ℃ was enhanced with the increase of temperature. The phase of Fe2Ti3O9 completely transformed into Fe2TiO5 phase at 900 ℃. With the increase of temperature, Fe2O3 phase diffraction peak strength gradually weakened; in the entire oxidation process there are four chemical reactions, which are correlated with the sintering, making the oxidation product surface more pores, become uneven and loose.