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基于粉末煅烧技术合成FeTiO_3和FeTiO_3-Fe_2O_3固溶体体系,在热力学分析的基础上,选取1150℃,以固溶体合成物为原料研究FeTiO_3-Fe_2O_3固溶体体系等温碳热还原过程,并采用X射线衍射仪和扫描电镜-能谱仪对还原产物进行系统分析.研究结果表明:合成产物内部成分均匀.钛铁矿的摩尔分数x越小,xFeTiO_3-(1-x)Fe_2O_3固溶体碳热还原反应越易进行,并且反应速率最大值越大.在反应初期,假板钛矿相(FeTi2O5-Fe2TiO5(Fe3Ti3O10))作为过渡相一直存在,至金属Fe和钛铁晶石Fe2TiO4生成后逐渐消失.
FeTiO_3 and FeTiO_3-Fe_2O_3 solid solution systems were synthesized based on powder calcination. Based on the thermodynamic analysis, the isothermal carbothermal reduction process of FeTiO_3-Fe_2O_3 solid solution system was studied at 1150 ℃. The solid solution synthesis was used as the raw material. The XRD and scanning SEM and EDS.The results show that the internal components of the synthesized product are uniform.The smaller the molar fraction x of ilmenite, the easier the carbothermal reduction reaction of xFeTiO_3- (1-x) Fe_2O_3 solid solution is, and At the initial stage of the reaction, the tantalite phase (FeTi2O5-Fe2TiO5 (Fe3Ti3O10)) exists as a transitional phase until the Fe and TiFe 2 Fe 3 Ti 3 O 4 gradually disappear.