Effect of Different Processing Routes on the Power Factor of the Filled Skutterudite Smy(FexNi1-x)4Sb12 (x = 0.50-0.80; y = 0.12-0.53)

Cristina Artini 1,2, Email

Giovanna Latronico 1

Riccardo Carlini 1

Shrikant Saini 3

Tsunehiro Takeuchi 4

Seongho Choi 4

Angelica Baldini 5

Umberto Anselmi-Tamburini 5

Fabrizio Valenza 2

Paolo Mele 6

Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, 16146 Genova, Italy

National Research Council, Institute of Condensed Matter Chemistry and Technologies for Energy, CNR-ICMATE, Via De Marini 6, 16149 Genova, Italy

Department of Mechanical and Control Engineering, Kyushu Institute of Technology, Fukuoka 804-8550, Japan

Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, 468-8511 Nagoya, Japan

Department of Chemistry, University of Pavia, Viale Taramelli 12, Pavia, Italy

SIT Research Laboratories, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, 135-8548 Tokyo, Japan

Abstract

The effect of varying the applied pressure during the processing by spark plasma sintering (SPS) of samples belonging to the Smy(FexNi1-x)4Sb12 system has been investigated by evaluating the power factor of the obtained filled skutterudite. A strong dependence of both the electrical conductivity and the Seebeck coefficient on the applied pressure has been observed. The highest power factor was detected at different pressures for the different compositions, being the optimal value 180 MPa for the sample with x = 0.80, and 400 MPa for the samples with x = 0.50 and x = 0.63. Relying on the present results, a possible further improvement of power factor of samples with x = 0.50 and x = 0.63 by enhancing the applied pressure above 400 MPa cannot be excluded.

Effect of Different Processing Routes on the Power Factor of the Filled Skutterudite Smy(FexNi1-x)4Sb12 (x = 0.50-0.80; y = 0.12-0.53)