The Electrical Conductivity and Infrared Properties of Ba-Doped SmCoO3-δ Composite Oxides
Layered SmBaCo2O5+δ with the cation-ordered double perovskite structure were synthesized by the solid-state reaction route and characterized by thermal analysis, X-ray diffraction, infrared spectrum, electrical conductivity and infrared emissivity. The Sm1-xBaxCoO3 (SBCO) system shows the different crystal structures with the variation of barium content, which results in the different electrical behavior. The electrical conductivity reaches maximum when x is 0.5 with SmBaCo2O5.54 phase. The infrared absorption occurs at about 600 cm-1 for all the samples which were attributed to Co-O stretching modes. The peak shifted to a lower frequency with the increase of doping level. In addition, the comparison of electrical and emissivity measurements suggested that variation of infrared emissivity is in agreement with the electrical properties.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
L. Chen et al., "The Electrical Conductivity and Infrared Properties of Ba-Doped SmCoO3-δ Composite Oxides", Advanced Materials Research, Vols. 239-242, pp. 687-690, 2011