CAJ | 학술논문

在微波外场作用下，以YCl3溶液为原料、草酸为沉淀剂直接液相合成了大颗粒砂状Y2O3前驱体，采用SEM、XRD和TG-DTA对前驱体及热分解产物进行表征，考察了H2C2O4与YCl3的摩尔比、YCl3起始浓度、反应时间和反应温度等对前驱体形貌的影响.结果表明，在微波外场作用及H2C2O4与YCl3的摩尔比为2∶1、YCl3的起始浓度为0.5 mol/L、反应时间3 h和反应温度40℃液相合成条件下，可得到D50约为40μm的附聚形大颗粒砂状前驱体.
재미파외장작용하，이YCl3용액위원료、초산위침정제직접액상합성료대과립사상Y2O3전구체，채용SEM、XRD화TG-DTA대전구체급열분해산물진행표정，고찰료H2C2O4여YCl3적마이비、YCl3기시농도、반응시간화반응온도등대전구체형모적영향.결과표명，재미파외장작용급H2C2O4여YCl3적마이비위2∶1、YCl3적기시농도위0.5 mol/L、반응시간3 h화반응온도40℃액상합성조건하，가득도D50약위40μm적부취형대과립사상전구체.
Using YCl3 and oxalic acid as raw materials, the effects of microwave on morphology of synthesis Y2O3 precursor in the liquid phase are investigated. The effects of mole ratio of H 2C2O4 to YCl3, initial con-centrations of YCl3, reaction time and reaction temperature on the morphology and dispersion of precursor are examined. Techniques, such as scanning electron microscope (SEM), X-Ray Diffraction (XRD) and TG-DTA are applied to precursors and thermal decomposition products. The results show that the large particle size and sand shape precursor with the average particle size of about 40 μm is produced under the conditions:mole ratio of H2C2O4 to YCl3 is 2:1, initial concentration of YCl3 is 0.5 mol/L, reaction temperature is 40 ℃with reaction time being 3 hrs.