CAJ | 학술논문

探讨钛铁矿氧化过程中的物相转化、形貌改变及其氧化机理。在700~800°C时，钛铁矿(FeTiO3)转变为赤铁矿(Fe2O3)和金红石(TiO2)，当温度高于900°C时，三价铁板钛矿开始形成。原始的钛铁矿粉末呈现顺磁性，但是经过中温(800~850°C)氧化后，氧化产物呈现弱铁磁性。同时，讨论钛铁矿的氧化机理。通过对微结构的观察，发现在中温氧化过程中颗粒表面出现大量微孔，其在氧化过程中能够强化氧的传质。
탐토태철광양화과정중적물상전화、형모개변급기양화궤리。재700~800°C시，태철광(FeTiO3)전변위적철광(Fe2O3)화금홍석(TiO2)，당온도고우900°C시，삼개철판태광개시형성。원시적태철광분말정현순자성，단시경과중온(800~850°C)양화후，양화산물정현약철자성。동시，토론태철광적양화궤리。통과대미결구적관찰，발현재중온양화과정중과립표면출현대량미공，기재양화과정중능구강화양적전질。
Phase transitions, morphology changes, and oxidation mechanism of the ilmenite oxidation process were investigated. FeTiO3 transforms to hematite and rutile when oxidation at 700?800 °C, and pseudobrookite is formed when the oxidation temperature reaches 900 °C. The initial ilmenite powder exhibits paramagnetism;however, after being oxidized at the intermediate temperature (800?850 °C), the oxidation product exhibits weak ferromagnetism. The oxidation mechanism was discussed. The microstructure observations show that a lot of micro-pores emerge on the surfaces of ilmenite particles at the intermediate temperature, which is deemed to be capable of enhancing the mass transfer of oxygen during oxidation.