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Process Thermochemistry Lab
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The lab observes and measures high-temperature reactions to transform metal production and semiconductors.
AboutAbout the lab
Mastering high-temperature reactions for a sustainable society
The Process Thermochemistry Lab studies metal production processes with low environmental impact, as well as semiconductor materials for solar cells, thermoelectric power generation, and power semiconductors.
The lab's strengths are techniques for measuring the activity of components and in situ observation at high temperatures.
Using these techniques, the lab clarifies how reactions work at high temperatures and aims to develop more efficient processes and higher-performance materials.
Key terms
- Activity
- A quantity that indicates how much a component in a mixture effectively contributes to a chemical reaction.
- Slag
- The liquid of molten oxides and other compounds produced during metal smelting, or the solid that forms when it hardens.
- Molten salt
- A salt melted into a liquid at high temperature. It is used for processes such as electrodeposition that cannot be done in aqueous solutions.
NewsLab news
Paper by Associate Professor Kawanishi et al. published in ISIJ International
Paper by Associate Professor Kawanishi et al. published in Journal of Materials Chemistry C
Associate Professor Sakiko Kawanishi received the Excellence in Research Award from the Steelmaking Science and Technology Consortium
Associate Professor Kawanishi received the "Excellence in Research Award" (Steelmaking Science and Technology Consortium)
Paper by Associate Professor Kawanishi et al. published in Tetsu-to-Hagané
ResearchResearch themes
The lab aims to develop metal smelting processes with lower environmental impact, along with materials essential for the efficient use of energy, such as those for solar cells, thermoelectric power generation, and power semiconductors. Its strengths are measuring the activity of components and in situ observation of high-temperature interfaces at up to 1800°C.
*Illustrative imageThermodynamics of ironmaking slag
Associate Professor Hasegawa studies the thermodynamics of the slag produced during ironmaking. By measuring the activity of components such as iron oxide and calcium phosphate, the lab investigates the properties of slag.
*Illustrative imageSolar cells without rare elements
Tin sulfide (SnS) has ideal properties for solar cells and contains no rare or toxic elements. Using an original liquid-phase growth method, the lab has produced high-quality crystals and succeeded in making the world's first SnS homojunction solar cell.
*Illustrative imageThermoelectric materials that turn waste heat into electricity
Tin selenide (SnSe) has very high thermoelectric performance at 200–700°C, but good crystals are difficult to grow. Using the crystal growth techniques developed with SnS, the lab produces high-quality SnSe crystals and is working to improve their performance.
*Illustrative imageMaking silicon films in molten salt
Assistant Professor Moteki has studied the electrodeposition of highly crystalline silicon films in molten salt, using liquid zinc or gallium as the electrode.
MembersFaculty
The members of the Process Thermochemistry Lab consist of faculty, researchers, master's students, and fourth-year undergraduates.
- Associate ProfessorMasakatsu Hasegawa
- Associate ProfessorSakiko Kawanishi
- Assistant ProfessorWataru Moteki
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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: “Melting silver” Mauro Cateb / CC BY-SA 4.0 (cropped)
- Thermodynamics of ironmaking slag: “Slag from iron ore melting” Knud Winckelmann / CC BY-SA 3.0 (cropped)
- Solar cells without rare elements: “Thin film folding solar” Wikideas1 / CC0 (cropped)
- Thermoelectric materials that turn waste heat into electricity: “Thermoelectric effect” Cmglee / CC BY-SA 4.0 (cropped)
- Making silicon films in molten salt: “Molten Salt Reactor-es” US Department of Energy Nuclear Energy Research Advisory Committee / CC BY 4.0 (cropped)
- Related lab (Materials Process Science Lab): “Barrel Plating For Small Parts” Encik Tekateki / CC BY-SA 4.0 (cropped)
- Related lab (Advanced Design Science and Engineering Lab): “JPL 3D-Printed Part Springs Forward (PIA26706 figA)” Proteus Space / Public domain (cropped)
- Related lab (Energy Materials Design Lab): “Typical reversed fatigue stress cycles” Yapparina / CC BY-SA 3.0 (cropped)
- Related lab (Material Properties Lab): “Holec2016P40” David Holec / CC BY-SA 4.0 (cropped)
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