Work

Influence of Aluminum Addition on Sinterability and Thermoelectric Properties of Mg2Si Compound Prepared Using Liquid-solid Phase Reaction Method and Pulse Discharge Sintering

Year: 2014

Type: article

Abstract: Mg2Si compound is a promising material available for thermoelectric power generation using waste heat of temperature range of 600 to 900 K. However, high vapor pressure of molten Mg makes difficulties in synthesis of Mg2Si compound and in sintering. In order to overcome these problems, we synthesized the Mg2Si compound under Mg–rich condition by the liquid-solid phase reaction and sintered the synthesized powder by the pulse discharge sintering. In this study, we attempted to add aluminum of 0−2.0 at.% to the Mg2Si and investigated the influence of addition of aluminum on sinterability and thermoelectric properties. Addition of Al brought to improvement of the sinterability and reduction of the electrical resistivity. The 1.0 at.% Al–added sample had the maximum dimensionless figure of merit of 0.86 at 873K.

Source: Journal of the Japan Society of Powder and Powder Metallurgy

DOI: 10.2497/jjspm.61.324

Authors: Takashi ITOH, Akira TOMINAGA, Takahiro JINUSHI, Zenzo ISHIJIMA

Institution: Nagoya University

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

OpenAlex ID: W403345744

FWCI: 0.943

Cites: 12

Cited by: 13

Related to: 10