Development of High-Performance Thermoelectric Materials through Grain Refinement and Texture Enhancement

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630330
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Kyushu University
• Principal Investigator: HORITA Zenji 九州大学, 工学(系)研究科(研究院), 教授 (20173643)
• Co-Investigator(Renkei-kenkyūsha): MUNETO Shinji (20380587)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 熱電材料 / Bi-Te系 / 超微細結晶粒 / 電気伝導率 / 熱伝導率 / 巨大ひずみ加工

Outline of Final Research Achievements

High-pressure sliding (HPS) was successfully applied to Bi2Te3 thermoelectric materials so that the grain size was significantly reduced and the crystal orientation was continuously developed. Maximum power factor increased with sliding distance for both n-type and p-type materials, especially the value achieved in the n-type was the highest ever reported. It was shown that HPS was a potential process for producing high-performance Bi2Te3 thermoelectric materials.

Free Research Field

材料組織学