Electrical properties of new oxides (Ca_(0.85-x)Y_xOH)_(1.16)CoO_2 synthesized by hydrothermal process  

作　　者：裴健 陈刚 贾德昌 孙净雪 于耀光 

机构地区：[1]Department of Chemistry,Harbin Institute of Technology [2]Institute for Advanced Ceramics,Harbin Institute of Technology

出　　处：《Journal of Rare Earths》2013年第6期600-603,共4页稀土学报（英文版）

基　　金：supported by National Natural Science Foundation of China(21201050,21271055);China Postdoctoral Science Foundation(2012M510086)

摘　　要：Layered cobalt oxides （Ca0.85–xYxOH）1.16CoO2 （x=0, 0.05, 0.1） were prepared by hydrothermal process and were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The electrical conductivity and Seebeck coefficient were measured from 323 to 573 K. The XRD and SEM analysis showed that all samples were single phase with plate-like morphology. The substitution of trivalent Y for divalent Ca had a remarkable effect on the enhancement of electrical properties. The maximum PF value, 9.17×10–5 W/（m？K2）, was obtained for （Ca0.75Y0.1OH）1.16CoO2 at 573 K, indicating that they are promising thermoelectric materials for middle-temperature usage.Layered cobalt oxides （Ca0.85–xYxOH）1.16CoO2 （x=0, 0.05, 0.1） were prepared by hydrothermal process and were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The electrical conductivity and Seebeck coefficient were measured from 323 to 573 K. The XRD and SEM analysis showed that all samples were single phase with plate-like morphology. The substitution of trivalent Y for divalent Ca had a remarkable effect on the enhancement of electrical properties. The maximum PF value, 9.17×10–5 W/（m？K2）, was obtained for （Ca0.75Y0.1OH）1.16CoO2 at 573 K, indicating that they are promising thermoelectric materials for middle-temperature usage.

关 键 词：layered cobalt oxide hydrothermal synthesis substituting electrical property rare earths 

分 类 号：O611.4[理学—无机化学]