IMRAM

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

東北大学
多元物質科学研究所

LAST UPDATE 2021/05/02

  • 研究者氏名
    Researcher Name

    高橋純一　Junichi TAKAHASHI
    助教　Assistant Professor

  • 所属
    Professional Affiliation

    東北大学多元物質科学研究所
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    無機材料研究部門　無機固体材料合成研究分野
    Division of Inorganic Material Research, Inorganic Crystal Structural Materials Chemistry

  • 研究キーワード
    Research Keywords

    材料科学
    計量形態学
    熱電エネルギー変換材料
    結晶構造解析
    Materials Science
    Quantitative microscopy
    Thermoelectric energy conversion materials
    Crystal structure analysis
研究テーマ
Research Subject
新規機能性材料の探索と特性評価
Research and characteristic evaluation of new functional materials

研究の背景 Background

材料の様々な特性は構成元素だけでなく微構造や環境の影響を大きく受けます。必要な性能を持つ材料を創り出すためには、機能発現の因子を原子スケールからマクロサイズにわたり評価する必要があります。加えて、先端材料の開発には、既知材料の壁の突破と新材料探索の継続的な展開が求められます。

The various properties of the functional materials undergo influence of the microstructure and the environment as well as constituent elements. In order to produce the material having the necessary performance a factor of function occurrence peculiar to the material has to be estimated in overlooking way from the atomic scale to the macro scale. Further, a breakthrough on a wall of the known material and continual development of new material search are required from development of advanced material.

研究の目標 Outcome

新規物質合成やシミュレーション、新しい解析方法の検討など基盤技術の多角的なアプローチによるセラミックス材料・金属材料の機能創出、機能発現機構の解明、新規評価方法の確立を目指しています。具体的な研究の内容は、単結晶・多結晶の創製と結晶構造解析、熱電特性評価、不可視材料における断面測定値からの３次元特性値の推定などです。

By using multilateral approach, such as new material creation, crystal structure analysis, simulation and statistical processing of multi-phase opaque-materials, measurement of thermoelectric properties, and consideration of a new method of analysis, studies with respect to the establishment of function creation, the elucidation of a function occurrence and the new evaluation method for ceramics and metallic materials are being carried out.

研究図Research Figure

Fig.1. Possible oxygen / nitrogen arrangement of Si2(O,N)7 ditetrahedra in the RE-J-phase determined by the Rietveld analysis using powder neutron diffraction data. Fig.2. Single crystals of Ca3Co2O6 prepared by a flux method. Fig.3. Extreme plot for the estimation of the maximum size distribution with a 2- dimensional diameter of the 2nd phase sections simulated from the 3-dimensional particles having log-normal distribution.

文献 / Publications

Acta Mater., 49, 711 (2001), Ibid, 49, 2355 (2001). J. Am. Ceram. Soc., 85, 2072 (2002). Metal. Mater. Trans. A, 34A, 171 (2003). Jpn. J. Appl. Phys., 43, L331 (2004). J. Eur. Ceram. Soc., 25, 793 (2005). Phys. Stat. Sol. A, 203, 2836 (2006). Mater. Sci. Forum, 554, 43 (2007). ISIJ Inter., 49, 1030 (2009).

研究者HP