摘要
以氯化钆(GdCl_3)饱和溶液作为钆源,膨胀石墨(EG)为载体,利用化学浸渍法合成了GdCl_3为3阶、Gd_2O_3为4阶的混合结构式GdCl_3-Gd_2O_3-EG复合材料。通过FESEM、EDS和XRD对产物的形貌、成分和阶结构进行表征,结果表明,当原料m_(Gd2O3)/m_(EG)(质量比)较小时,GdCl_3-EG为2、3阶混合结构,随着质量比的增大,插层结构稳定为3阶结构;同时,Gd^(3+)与膨胀石墨中的含氧基团结合生成Gd_2O_3,Gd_2O_3进入膨胀石墨层间形成4阶结构的Gd_2O_3-EG,其阶结构不随m_(Gd2O3)/m__(EG)比值的变化而变化。
In this paper, expanded graphite and GdCl3 saturated solution were chosen as raw materials to prepare GdCl3- Gd2O3-EG using the chemical impregnation method, which contains GdCl3 of3rd stage and Gd2O3 of 4th stage. Morphologies, composition and structures of the products were characterized by FESEM, EDS and XRD. It is found that GdCl3-EG was of mixed structure of 2nd and 3rd stages at small m（ Gd2O3 ）/m（EG） ratio, then of stable 3rd stage with increasing m（ Gd2O3 ）/ m（EG） ratio. Gd2O3 was obtained by the reaction between Gd3＋ and oxygen groups from EG, and some Gd2O3 entered interlayers of expanded graphite, but Gd2O3-EG kept stable 4th stage structure, which was independent of m（ Gd2O3 ）/m （EG） ratio.
出处
《稀土》
EI
CAS
CSCD
北大核心
2011年第4期60-66,共7页
Chinese Rare Earths
基金
山西省国际科技合作项目(2007081029)
