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利用溶胶凝胶燃烧合成法分别制备了八种重稀土掺杂的硼酸钐粉体,采用XRD和SEM对粉体的物相组成和形貌进行了表征。结果表明,重稀土离子的引入并没有改变SmBO3的晶体结构,SmBO3以三斜相为主,并含有少量的六方相,六方相的含量随着掺杂离子半径的减小而增加。重稀土离子掺杂的SmBO3粉体形貌呈现不规则片状,颗粒尺寸差别不大。采用紫外可见分光光度计对粉体进行了反射率测试,八种粉体在1.064μm处的反射率变化不大,但均较未掺杂SmBO3粉体的反射率略有提高,说明六方相的存在明显降低了SmBO3的光学性能。
Eight heavy rare earth doped samarium borate powders were prepared by sol-gel combustion synthesis. The phase composition and morphology of the powders were characterized by XRD and SEM. The results show that the introduction of heavy rare earth ions does not change the crystal structure of SmBO3. SmBO3 is mainly composed of triclinic phase with a small amount of hexagonal phase. The content of hexagonal phase increases with the decrease of doping ion radius. The morphology of SmBO3 powder doped with heavy rare earth ions presents irregular flake, with little difference in particle size. The reflectivity of the powders was tested by UV-Vis spectrophotometer. The reflectivity of the eight powders at 1.064μm did not change much, but the reflectivity of the powders was slightly higher than that of the undoped SmBO3 powders. The presence of SmBO3 significantly reduces the optical properties.