纺锤形氢氧化钇和氧化钇的微波快速合成、表征及其光学性能研究

Spindle-like Yttrium Hydroxide and Yttrium Oxide:Microwave Synthesis,Characterization and Photoluminescence Properties

在乙二胺四乙酸二钠(EDTA)存在的条件下,用微波加热法快速合成了大量纺锤形氢氧化钇。考察了微波加热时间对合成的影响。结果表明,微波加热15min可制备形状貌均一且结晶良好的纺锤形氢氧化钇,其颗粒长度为2.5～4.0μm,宽度为400～900nm。将纺锤形氢氧化钇在500℃煅烧4h后可得纺锤形氧化钇,同时用相似方法还成功制备出纺锤形Y_2O_3:Eu^(3+),对其光学性能进行了研究,发现当激发波长为465nm时,最强发射峰在613nm。用XRD、SEM对合成的产物进行了表征,并对纺锤形氢氧化钇形成的机理进行了简单探讨。

Spindle-like Y（OH）3 is prepared on a large scale in short time with the assistance of microwave heating in the presence of disodium ethylenediamine tetraacetate （EDTA）. The effect of microwave heating time on the synthesis is investigated in details. The results show that uniform and well crystallized spindle-like Y（OH）3 can be obtained in 15min. The spindle-like products are in a length of 2. 5μm to 4. 0μm and a width ranging from 400nm to 900nm. The spindle-like Y（OH）3 is converted to spindle-like Y2O3 after thermal decomposition at 500℃ for 4h. Spindle-like Y2O3 ： Eu3＋ powder is also prepared and the photoluminescence（PL） properties are studied. Under the excitation of 465nm light, the most intense emission peak locates at 613nm. The products are characterized by X-ray diffraction（XRD）, scanning electron microscopy （SEM）. A possible formation mechanism for the spindle-like Y（OH）3 is suggested.