Synthesis of single crystalline silicon clathrate for high performance thermoelectric materials

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760538
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals
• Research Institution: Kyushu University
• Principal Investigator: MUNETOH Shinji 九州大学, 工学(系)研究科(研究院), 准教授 (20380587)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 熱電材料 / クラスレート / ゼーベック係数 / 比抵抗 / 移動度 / パワーファクター

Outline of Final Research Achievements

Single crystalline Ba8AlxSi46-x clathrates were synthesized using by Czochralski method. The power factor of the synthesized single crystal samples showed twice the value of poly-crystalline samples because of the increase of electron mobility by single crystallization. Aluminum-rich single crystalline Ba8AlxSi46-x clathrates were also synthesized from Aluminum-rich melt. We were able to synthesize high performance thermoelectric material with power factor of 1.1×10-3 V2/K2･Ωm. We were able to fabricate an uni-leg thermoelectric module with the maximum output power of 0.13 W.

Free Research Field

固体物性