CAJ | 학술논문

研究TiO2电化学还原法提取金属钛的阴极制备参数--饶结温度和烧结时间.采用SEM、EDS等方法研究烧结温度、烧结时间对TiO2阴极微观结构、孔隙率的影响及不同烧结条件下TiO2阴极电解产物结构和氧含量的变化.结果表明:烧结条件主要影响电极的粒度大小、孔隙尺寸和孔隙分布:在较高温度下烧结较长时间获得的电极片粒度较粗,而孔隙率的变化比较复杂.电极的颗粒尺寸、孔隙率直接影响脱氧率:粒度较小的电极在试验条件下可被充分还原;电极中的开孔和闭孔都有利于电化学还原过程的进行.在1000～1100℃下烧结4 h获得的TiO2阴极脱氧效果较好.
연구TiO2전화학환원법제취금속태적음겁제비삼수--요결온도화소결시간.채용SEM、EDS등방법연구소결온도、소결시간대TiO2음겁미관결구、공극솔적영향급불동소결조건하TiO2음겁전해산물결구화양함량적변화.결과표명:소결조건주요영향전겁적립도대소、공극척촌화공극분포:재교고온도하소결교장시간획득적전겁편립도교조,이공극솔적변화비교복잡.전겁적과립척촌、공극솔직접영향탈양솔:립도교소적전겁재시험조건하가피충분환원;전겁중적개공화폐공도유리우전화학환원과정적진행.재1000～1100℃하소결4 h획득적TiO2음겁탈양효과교호.
The sintering parameters of cathode preparation for the process of electrochemical reduction of TiO2 to titanium such as the temperature and the time were investigated. The SEM and EDS methods were used to study the influences of sintering temperature and time on the microstructure and porosity of the TiO2 compacts;moreover, the influences on the microstructure and oxygen content of the electrochemical reduction products were studied. The sintering parameters mainly affect the particle size,porosity and pore distribution of the cathodes. The compact with coarser grain size can be obtained when sintered at higher temperature and for longer time;while the change of the porosity in the compact is complex under different sintering conditions. The oxygen content of the electrochemical-reduced products depends on the grain size and the porosity of the sintered compacts. The compacts with small grains, used as cathode samples can be fully reduced;both open pores and closed pores in the samples are favorable to the electro-reduction process. The proper cathode preparation condition is that the greens are sintered at 1000-1100 ℃ for 4 h according to the results of the experiments.