A novel electric power generation under uniform temperature environment using poly-crystalline Ba8AuxSi46-x clathrate

Shinji Munetoh, Yuuki Osakabe, Keita Yamasoto, Jyunpei Iwanaga, Hideshi Miura, Osamu Furukimi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Poly-crystalline Ba8AuxSi46-xclathrate with p-n junction was synthesized for electric power generation from heat under no temperature difference. The n-type Ba8Au4.5Si41.5 and the p-type Ba8Au5.5Si40.5 powder were stacked in the graphite die and sintered by a Spark Plasma Sintering (SPS) method at 1073 K for 5 min with pressure of 50 MPa. The Au composition of Ba8Au4.5Si41.5 and Ba8Au5.5Si40.5 side in the sintered sample were Ba7.8Au4.2Si41.8 and Ba7.8Au5.2Si40.8, respectively. It was found that the Au composition was gradually changed near the interface with thickness of around 500 micrometers. Electric power generation test under no temperature difference was performed by using the sample cut to contain the interface of two layers. The electric power increased by only heating and the maximum voltage can be observed around 2 mV at 773 K. These results suggested that electron excitation occurred near the n/p interface and generated electrons and holes diffuse to n-type and p-type semiconductor side, respectively.

    Original languageEnglish
    Pages (from-to)471-474
    Number of pages4
    JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
    Volume64
    Issue number8
    DOIs
    Publication statusPublished - Aug 2017

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Metals and Alloys
    • Materials Chemistry

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