CAJ | 학술논문

首次用低温水热法制备了ScF_3晶体及其掺杂Ce~(3+)的粉体.通过X射线粉末衍射(XRD),扫描电镜(SEM),荧光光谱(FS)对样品进行了表征.结果表明,所用氟化物的种类和反应温度对ScF_3的制备至关重要.以NaF作为原料更容易得到纯的ScF_3.当水热温度为120℃时,产物为ScF_3晶体,而温度升高至180℃时则为NaScF4复合氟化物.所制备的ScF_3呈针尖棒状放射形.考察了ScF_3:Ce~(3+)粉体荧光光谱性质,讨论了其与同类型的稀土氟化物的荧光光谱的比较.
수차용저온수열법제비료ScF_3정체급기참잡Ce~(3+)적분체.통과X사선분말연사(XRD),소묘전경(SEM),형광광보(FS)대양품진행료표정.결과표명,소용불화물적충류화반응온도대ScF_3적제비지관중요.이NaF작위원료경용역득도순적ScF_3.당수열온도위120℃시,산물위ScF_3정체,이온도승고지180℃시칙위NaScF4복합불화물.소제비적ScF_3정침첨봉상방사형.고찰료ScF_3:Ce~(3+)분체형광광보성질,토론료기여동류형적희토불화물적형광광보적비교.
ScF_3 microcrystal and Ce~(3+)-doped powders were prepared with a hydrothermal process at low temperature. The samples were characterized by X-ray diffraction,scanning electron microscopy and fluorescence spectra. Kind of starting fluorides and reaction temperature are key factors for ScF_3 preparation.Pure ScF_3 can be easily prepared at 120℃ with NaF as starting fluoride,while compound fluorides impuritiesalways produced when the reaction temperature is higher than 140℃ or using KF/NH4F as the starting fluoride. The ScF_3 microcrystal give an anomalous pinpoint stick shape. The fluorescence properties of ScF_3:Ce~(3+) were discussed and compared with those of other rare earth fluorides.