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该文以六次甲基四胺(Hexamethylenetetramine,C6H12N4)和六水合硝酸钐[Sm(NO3)3·6H2O]为原料,采用均匀沉淀水热法合成Sm2O3前驱体Sm(OH)3,利用热重(TG)和X射线衍射(XRD)分析方法确定了制得的微/纳米Sm2O3的适宜焙烧温度为800℃。前驱体Sm(OH)3经800℃焙烧后得到微/纳米Sm2O3,利用XRD和扫描电子显微镜(SEM)对产物的晶型、形貌及尺寸进行了表征。考察了反应时间、反应温度对产物形貌和尺寸的影响。结果表明,制得的微/纳米Sm2O3及其前驱体Sm(OH)3分别为立方和六方晶相结构;随着反应时间的增长,微/纳米Sm2O3的形貌由片状逐渐自组装为三维花球;随着反应温度的升高,微/纳米Sm2O3三维花球的粒径逐渐增大,组成三维花球结构的纳米片逐渐变厚且组装更加紧密。
Sm (OH) 3 was synthesized by homogeneous precipitation hydrothermal method using hexamethylenetetramine (C6H12N4) and samarium nitrate hexahydrate [Sm (NO3) 3 · 6H2O] (TG) and X-ray diffraction (XRD) analysis methods to determine the appropriate micro / nano Sm2O3 sintering temperature of 800 ℃. The precursor Sm (OH) 3 was calcined at 800 ℃ to obtain micro / nano Sm2O3. The crystal structure, morphology and size of the product were characterized by XRD and SEM. The effects of reaction time and reaction temperature on the morphology and size of the product were investigated. The results show that the micro / nano Sm2O3 and the precursor Sm (OH) 3 are cubic and hexagonal respectively. With the increase of reaction time, the morphology of micro / nano Sm2O3 gradually self-assembled into three-dimensional With the increase of reaction temperature, the particle size of the micro / nano Sm2O3 three-dimensional curd gradually increased, and the three-dimensional curd-like nano-flakes grew thicker and assembled more tightly.