Preparation and Physical Properties of Segmented Thermoelectric YBa2Cu3O7?x -Ca3Co4O9 Ceramics

2017 2nd International Conference on Functional Materials and Metallurgy

材料科学;冶金学

Wannasut, P.^1,2 ; Keawprak, N.^3 ; Jaiban, P.^4 ; Watcharapasorn, A.^1,5

Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai

50200, Thailand^1

Graduate School, Chiang Mai University, Chiang Mai

50200, Thailand^2

Thailand Institute of Scientific and Technological Research, Pathum Thani

12120, Thailand^3

Faculty of Science, Energy and Environment, King Mongkut's University of Technology North Bangkok, Rayong Campus, Rayong

21120, Thailand^4

Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai

50200, Thailand^5

关键词: Elemental diffusion;    Energy research;    High conversion efficiency;    Hot pressing method;    Pressing conditions;    Relative density;    Sharp interface;    Strongly connected;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/303/1/012010/pdf
DOI  :  10.1088/1757-899X/303/1/012010

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Segmented thermoelectric ceramics are now well known for their high conversion efficiency and are currently being investigated in both basic and applied energy researches. In this work, the successful preparation of the segmented thermoelectric YBa2Cu3O7-x-Ca3Co4O9(YBCO-CCO) ceramic by hot pressing method and the study on its physical properties were presented. Under the optimum hot pressing condition of 800 °C temperature, 1-hour holding time and 1-ton weight, the segmented YBCO-CCO sample showed two strongly connected layers with the relative density of about 96%. The X-ray diffraction (XRD) patterns indicated that each segment showed pure phase corresponding to each respective composition. Scanning electron microscopy (SEM) results confirmed the sharp interface and good adhesion between YBCO and CCO layers. Although the chemical analysis indicated the limited inter-layer diffusion near the interface, some elemental diffusion at the boundary was expected to be the source of this strong bonding.