论文部分内容阅读
以SmCl3.6H2O和NaOH为起始原料,采用水热法可控制备了Sm2O3微晶.利用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)分别对产物的物相和形貌进行了表征.结果表明:在水热条件下,反应温度为200℃,前驱溶液pH为9时,水热产物主晶相为Sm2O3,杂相为Sm(OH)2Cl,呈现细棒状结构.在800℃下煅烧,保温1h均可得到纯的Sm2O3立方相微晶.随着pH值的增大,所制备的Sm2O3微晶的形貌变成规则的棒状结构,当pH为9时,棒状结构尺寸约为0.2～0.3μm.
Using SmCl3.6H2O and NaOH as starting materials, the hydrothermal method can be used to prepare Sm2O3 microcrystals. The phase and morphology of the products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) The results show that under the hydrothermal conditions, the reaction temperature is 200 ℃, the precursor solution pH is 9, the main phase of the hydrothermal product is Sm2O3, the heterogeneous phase is Sm (OH) 2Cl, showing fine rod-like structure at 800 ℃ Under the calcination and holding for 1h, pure Sm2O3 cubic phase crystallites can be obtained.With the increase of pH value, the morphology of the prepared Sm2O3 crystallites becomes a regular rod-like structure, and when the pH is 9, the rod- Is 0.2 to 0.3 μm.