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New Materials for The Future
Functional Materials Laboratory
Katsuhisa Nagayama
Professor, Department of Materials Science and Engineering
College of Engineering
Materials Science and Engineering in Master's Program
Functional Control Systems in Doctoral Program
Location: Toyosu Campus
Laboratory Overview
Simulate space material science experiment in laboratory
We are conducting formation experiments on high performance materials such as magnetic and semiconductors by using various containerless proceses. In particular, we are conductind research on single crystal fine particle formation of Ⅲ-Ⅴtype semiconductors using a drop tube with a falling part 2.5m and formation of Nd-Fe-B high performance permanent magnets using a method of quanchind levitaing melt droplet. In addition, liquid phase epitaxial growth experiments ofⅢ-Ⅴtype semiconductores and experiments for magnetic semiconductor fine particle formation are slso conducted.
Laboratory Character Containerless process is a special experimental method that can simulate materials science experiments in the zero gravity environment like the space on the ground. Our laboratory creates new materials such as Nd-Fe-B high performance permanent magnets, spherical single crystal solar cells Si, Ⅲ-Ⅴtype compound semiconductor single crystals and magnetic semiconductor fine particles by using various containerless processes, we are doing for researth.
Research Outputs You can review research papers in the website below.
Laboratory Research Field
Materials Science Condenced Matter Physics Solidification and Crystal Growth Containerless Process Microgravity Science
Nd-Fe-B Permanent Magnetic Material Spherical Semiconductor Si Ⅲ-ⅤType Single Crystal Semicondoutor Amorphous Quasicrystal
Recent Research Topics
Single crystalline particles frmation of InSb and GaSb Ⅲ-Ⅴtype semiconductor by using drop tube process The effect of melt temperature and solidification time on the single crystal formation of InSb particles by using drop tube The effect of adding elements on single crystal formation of InSb particles by using short drop tube process Solidification morophology and microstructure of the Si particles with Fe Nd and Gd additions formed using a short drop tube process
The effect of the drop tube process for the quasicrystal fine particles formation The effect of additional Cu on the appearance of formation ability and high coercivity for Nd-Fe metastable phase by using short drop tube process High performance Nd-Fe-B permanent magnetic materials by using levitating melt droplet quenching and high speed compaction process Microstructure and solidification process of Fe-Cu immisible alloys by using containerless process  
Affiliated Conferences
The Japan Institute of Metal and Materials The Japan Socity of Microgravity Applicasion The Magnetics Society of Japan    
For Social Contributions to the World Sustainability Nd-Fe-B magnet materilas are expected to developed high performance materials as engine drive motors for hybrid vehices and electric cars. Spherical single crystal Si for solar cells with high coversion efficiency is also indispensable for future society and industry. Furthermore, it is also essential to develop a process for producing a single crystal growth from a melt of Ⅲ-Ⅴtyape compound semiconductors, which is expected as a material for LED and laser. In our laboratry, we are conductiong reserach based on the above background.
Related Industries
Magnetic material manufacturing industry Semiconductor material manufacturing industry Functional fine particle material manufacturing industry    
Applicable Industrial Fields
Permanent magnetic material Si andⅢ-Ⅴtype semiconductor particle Amorphous Quasicrystal  
Instruments and Devices in this Laboratory
Electromagnetic lavitation apparatus Gasjet lavitation apparatus Drop tube apparatus Levitating melt droplet quenching apparatus Lavitating melt high speed compaction apparatus
Vibrating sample magnetometer Differantial thermal analysis apparatus Carbon ion coater High speed camera  
Research Seeds
Formation of high coercive force type Nd-Fe-B permanent magnet by using levitating melt droplet compaction process The high efficiency sherical single crystal Si production for solar cells in the near future by using short drop tube procee Ⅲ-Ⅴtype and magnetic semiconductor single crystalline particles frmation by using short drop tube process