Ibaraki University

Showa Kde Co., Ltd.

Nippon Thermostat Co., Ltd.

Tokyo University of Science Educational Foundation Administrative Organization

Swcc Showa Cable Systems Co., Ltd.

Itoh Kikoh Co., Ltd.

Yohiko Mito

Takashi Nemoto

Naoki Fukushima

Tetsuya Deguchi

Tsutomu Iida

Tatsuya Sakamoto

Hirokuni Nanba

Haruhiko Udono

Kuniaki Mizuno

Yasuhiko Honda

Masahiro Minowa

Kazunori Sawada

Yukio Takizawa

Yutaka Taguchi

Provided are an apparatus and a method for producing an inexpensive MgSiSnpolycrystal that can be effectively used as thermoelectric conversion materials that can be expected to have a high performance index by doping if necessary. A problem can be solved by a production apparatusfor producing an MgSiSnpolycrystal including at least a reaction vessel for synthesis of MgSiSnrepresented by the following formula (1) by filling a mixture of Mg particles and Si particles or Mg particles and Sn particles, or Mg&#x2014;Si alloy particles or Mg&#x2014;Sn alloy particles as a main starting materialto cause a reaction; an inorganic fiber layerwhich is fixedly provided above the starting materialfilled into the reaction vesseland has air permeability, which can be caused to disappear by a productgenerated by chemical reaction of vaporized Mg with oxygen during the synthesis of the polycrystal; heating meansfor heating the reaction vessel; and control meansfor controlling the heating temperature and heating time of the reaction vessel, whereinMgSiSn&#x2003;&#x2003;(1)

Apparatus and method for producing Mg(2)Si(1-x)Sn(x) polycrystal

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Tokyo, Japan

Yohiko Mito