| 研究実績の概要 |
MgAgSb-based alloy was successfully prepared via ordinary planetary ball milling and spark plasma sintering. The element Cu successfully doped into MgAgSb to cooperatively optimize the electrical transport properties. The main parameters including nominal composition of raw powders Mg, Ag, Sb, Cu doping ratio, SPS pressure and heat treating conditions have been optimized. Due to the Cu successfully doped into Ag site, the maximum PF value of 2111 μW/mK-2 at 523K for MgAg0.93Cu0.02Sb0.98 was about 18% increased than 1788 μW/mK-2 for the initial sample MgAg0.95Sb0.98, a peak ZT ~ 1.08 at 473 K were achieved for the sample MgAg0.935Cu0.015Sb0.98. This work reveals that the TE performance of MgAgSb alloys can be enhanced via Cu doping, which could provide guidance for other materials.
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