豊橋技術科学大学

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Nakano, Hiromi

Affiliation Cooperative Research Facility Center
Title Professor
Fields of Research Inorganic materials, Structural analysis
Degree Dr. of Engineering (Toyohasi University of Technology)
Academic Societies Member of Science Council of Japan/The Ceramic Society of Japan/The Society of Powder Technology, Japan/Japanese Society of Microscopy/The Society of Materials Science, Japan/The Japan Society of Applied Physics/
E-mail hiromi@crfc
Please append ".tut.ac.jp" to the end of the address above.
Laboratory website URL http://www.crfc.tut.ac.jp/nakano/index.html
Researcher information URL(researchmap) Researcher information

Research

外部場を効率的に利用することにより、原子レベルで構造・組織を制御した無機材料を創製し、新たな機能発現およびそれらの機能向上をめざす研究をしています。
外部場としては加圧、プラズマ照射によるグリーンプロセッシングや、高磁場中での粒子配向プロセッシングを試みています。

近年では、新酸化物蛍光体材料において、紫色(400nm)励起による赤色純度の高い蛍光体材料合成に成功し、2016年1月11日の日刊工業新聞にも取り上げられ、企業からも注目され始めています。

得られた材料は、機能向上のために、マクロ~原子レベルでの組織・構造解析を行い、実験データを基にしたシミュレーション等により、正確に発現機構を解明することにより、「技術を科学で裏付け」、その知見を材料設計にフィードバックしながら研究を進めています。

最近、企業との共同研究により、加圧やプラズマ照射による新規焼成炉を用いた材料合成の低温・短時間合成に挑戦し、焼成メカニズムを解明しています。2017年12月には国内特許を出願し、2019年2月に登録されました。

Theme1:Synthesis of new oxide phosphors and clarification of mechanism for relationship between property and crystal structure

Overview

1. Synthesis of new phosphors by solid-phase reaction and liquid-phase-reaction
2. Design and synthesis for new phosphor by controlling of composition and crystal structure
3. Application of red phoshpor Li-Ta-Ti-O:Eu excited by 400 nm
4. Relationship between crystal structure and photoluminescence

Grant-in-Aid for Scientific Research No. 16K06721 from the Japan Society for the Promotion of Science)

Keywords

ceramics, phosphor, millimeter-wave heating, rapid synthesis

Theme2:Microstructure and mechanical property of metallic materials controlled by metallographic-structure and -phases

Overview

We are investigating metallic films with a nano-lamellar structure or porous metals. TEM observations and simulations by molecular dynamics and first-principles analysis are used to study the mechanism of metallic materials’ physical properties.
This investigation is being pursued in collaboration with Kyoto University (Mabuchi Lab.).

Keywords

metallic material, microstructure, boundary structure, transmission electron microscope, structural analysis, twin structure, mechanical property

Theme3:Anisotropic structure and property in oriented bulk ceramics

Overview

In this work, as a first step toward application of the unique qualities of an electro-ceramic with an anisotropy structure, we prepared an oriented LNT balk ceramic by slip casting in a strong magnetic field of 12 T. The direction of the magnetic field was parallel to the casting direction. The obtained specimen was analyzed by X-ray diffraction, scanning electron microscope, and transmission electron microscope. Consequently, the c-axis of the LNT powders was aligned parallel to the magnetic field and a high orientation degree was achieved in a strong magnetic field of 12 T.

Keywords

TEM, superstructure, structural analysis, magnetic fiels, oriented grain,

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