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Materials Thermodynamics Lab
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The lab studies materials processes, observing high-temperature reactions and crystal growth in order to understand and control them.
AboutAbout the lab
Exploring the moment materials are born
The Yoshikawa Lab (Materials Thermodynamics) studies new manufacturing processes for next-generation materials, built on thermodynamics, kinetics, and crystal growth engineering.
The lab develops its own observation techniques to directly "see" high-temperature reactions, phase transformations, and crystal growth, and controls processes based on an understanding of these phenomena.
Its targets include SiC, nitride semiconductors, metallic materials, and recycling processes.
The lab also works toward zero-emission manufacturing of steel, nonferrous metals, glass, and ceramics, and on environmental materials that make up for the CO₂ emitted to date.
Key terms
- phase transformation
- A phenomenon in which the crystal structure or state of a substance changes into another when conditions such as temperature change
- kinetics
- The study of how fast reactions and changes proceed
- zero emissions
- The idea of eliminating emissions such as CO₂ from the manufacturing process
ResearchResearch themes
Built on thermodynamics, kinetics, and crystal growth engineering, the lab explores new manufacturing processes for next-generation materials by understanding and controlling reactions, phase transformations, and crystal growth at high temperatures. Its targets include SiC, nitride semiconductors, metallic materials, and recycling processes, and it aims to create materials technologies that support zero-emission manufacturing.
*Illustrative imageMaterials synthesis by high-temperature solution growth
The lab studies crystal growth processes in high-temperature solutions to improve the quality of next-generation power semiconductor materials such as SiC and aluminum nitride (AlN). By combining thermodynamics with crystal growth engineering, it controls growth rate, composition, and interfacial phenomena.
*Illustrative imageObserving crystal growth in situ
Reactions and crystal growth at high temperatures are hard to see from the outside. The lab develops its own in situ high-temperature observation techniques to directly capture the moment materials are born, and uses them to understand the mechanisms of crystal growth and to control processes.
*Illustrative imageAnalysis of metal casting and solidification processes
The microstructure and properties of metallic materials are largely determined as they solidify from the molten state. The lab examines solidification microstructure formation, segregation, and phase transformations from the perspectives of thermodynamics, kinetics, and data analysis, aiming to advance metal processes.
*Illustrative imageNew processes for material recycling
To address resource constraints and reduce environmental impact, the lab studies new recycling processes that keep materials in circulation. It builds a thermodynamic understanding of the principles behind high-temperature reactions, separation, and refining, and applies it to process design that supports environmentally friendly manufacturing.
MembersFaculty
The Yoshikawa Lab consists of faculty, project professors, project researchers, visiting researchers, administrative assistants, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorTakeshi Yoshikawa
- Associate ProfessorMasashi Nakamoto
- Project ProfessorKazuki Morita
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Transferring molten metal from the furnace to the ladle” Goodwin Steel Casting / CC BY-SA 2.0 (cropped)
- Materials synthesis by high-temperature solution growth: “Rounded Silicon Carbide Ingot” LaMèreVeille / CC BY-SA 4.0 (cropped)
- Observing crystal growth in situ: “Molten Metal in a Casting Ladle” Mnooralam11 / CC BY 4.0 (cropped)
- Analysis of metal casting and solidification processes: “In-stream inoculation addition while molten cast iron is poured to a green sand mold in a foundry in Bangladesh” Sm faysal / CC BY-SA 4.0 (cropped)
- New processes for material recycling: “Steel recycling bales” blahedo / CC BY-SA 2.5 (cropped)
- Related lab (Advanced Hard Materials Lab [Institute of Scientific and Industrial Research]): “Advanced ceramics” Eng7oda14 / CC BY-SA 3.0 (cropped)
- Related lab (Materials Chemistry in Extreme Environments Lab): “Corroded Bolt” ImagePerson / CC BY-SA 4.0 (cropped)
- Related lab (Novel Joining Lab): “ChipScaleClock2 HR” NIST / Public domain (cropped)
- Related lab (Quantum Functional Materials Design Lab): “ORNL Electron Microscope ( )” ENERGY.GOV / Public domain (cropped)
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