Year: 2012
Type: article
Abstract: Mg와 Sb 분말을 사용하여 1173 K에서 결정성이 좋은 단일상의 $Mg_3Sb_2$ 합금을 제조하였다. 이 합금의 열전성능지수 zT는 온도상승에 따라 크게 증가하였고 593 K에서 $2.39{\times}10^{-2}$ 의 값을 나타내었다. 얻어진 $Mg_3Sb_2$ 합금을 planetary ball mill에서 12~48시간 볼밀링할 경우 주 결정상 $Mg_3Sb_2$ 는 유지가 되었으나 결정성이 나빠졌고 금속원소 Sb상이 나타났다. Mg와 Sb를 섞고 24시간 볼밀링에 의한 합금화 방법으로 합성할 경우 원소금속 Sb가 나타나지 않은 $Mg_3Sb_2$ 결정상을 얻을 수 있었다. A single phase $Mg_3Sb_2$ alloy was synthesized by melting the mixture of Mg and Sb metal powders at 1173 K. The figure of merit of the $Mg_3Sb_2$ prepared by melting method increased with temperature and showed a value of $2.39{\times}10^{-2}$ at 593 K. When the $Mg_3Sb_2$ powders were milled at high speed in a planetary ball mill for 12~48 h, Zintle phase ( $Mg_3Sb_2$ ) was maintained as a main phase, but its crystallinity became deteriorated and elemental Sb phase appeared. Sb phase free $Mg_3Sb_2$ could be obtained by the mechanical alloying of high speed ball milling for 24 h using elemental Mg and Sb powder mixtures.
Author: In-Ki Kim
Institution: Hanseo University
Language: Korean
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1992949812