Bi_2O_3掺杂Sm_(0.5)Sr_(0.5)CoO_(3-δ)的制备与光学性能研究  

Preparation and Optical Properties of Bi_2O_3 Doped Sm_(0.5)Sr_(0.5)CoO_(3-δ)

作　　者：韦玲[1] 陆依[1] 房正刚[1] 张荣[1] 陆春华[1] 许仲梓[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《人工晶体学报》2016年第4期1006-1011,共6页Journal of Synthetic Crystals

基　　金：中国科学院特种无机涂层重点实验室开放课题资助(KLICM-2014-10)

摘　　要：采用固相法制备(Sm_(1-x)Bi_x)_(0.5)Sr_(0.5)CoO_(3-δ)(0≤x≤0.5),研究不同Bi^(3+)掺杂浓度对材料的晶体结构、表面形貌与光学性能的影响。结果表明,当掺量0≤x(Bi3+)≤0.2,材料为单一纯相的钙钛矿结构;当掺量0.3≤x≤0.5,材料主相仍保持着钙钛矿结构,同时出现杂相CoO与Sr_(0.5)CoBi_(0.5)O_x。(Sm_(1-x)Bi_x)_(0.5)Sr_(0.5)CoO_(3-δ)平均粒径随着Bi3+掺量的增加由1.98μm增大为9.77μm,晶粒形状由多边形状变为方块状;光学测试表明,随着Bi^(3+)浓度的增加,材料的光学吸收率由0.73增大到0.87,发射率由0.34增大到0.80。Perovskite-type oxides （Sm1-xBix）0.5Sr0.5CoO3-δO（ 0 ≤x≤ 0. 5） were successfully prepared by a solid-state reaction method. The effect of Bi-（3＋）doping concentration on the crystal structure,microstructure,solar absorbance and thermal emittance properties of（Sm1-xBix）0.5Sr0.5CoO3-δ was investigated. Results indicate that the single orthorhombic perovskite structure was obtained for 0≤x≤0. 2; when 0. 3≤x≤0. 5,the main phase was the perovskite orthorhombic structure while a small amount of inpurity phases Co O and Sr0.5CoBi0.5O xemerged. The average particle size of SBSC was increased from 1. 98 μm to 9. 77 μm as the Bi^3＋concentration increasing,and the grain morphology changed from polygon to bulk as result of Bi^3＋doping.The incorporation of B^3＋doped into Sm^3＋sites were found to enhance the solar absorbance from 0. 73 to 0. 87 and to stimultaneously increase the infrared emittance from 0. 34 to 0. 80.

关 键 词：固相法 太阳吸收率 发射率 Sm0.5Sr0.5CoO3-δ 

分 类 号：TQ174.75[化学工程—陶瓷工业] TK519[化学工程—硅酸盐工业]