R
Ryohei Otsuka
Researcher at Waseda University
Publications - 68
Citations - 978
Ryohei Otsuka is an academic researcher from Waseda University. The author has contributed to research in topics: Sepiolite & Talc. The author has an hindex of 14, co-authored 68 publications receiving 941 citations.
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Effects of Layer Charge, Charge Location, and Energy Change on Expansion Properties of Dioctahedral Smectites
TL;DR: In this paper, the authors investigated the role of hard limestone on the pedoclimate of terra rossa and found that the processes of rubification and vermiculitization could have taken place at the same time.
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Recent studies on the decomposition of the dolomite group by thermal analysis
TL;DR: In this article, a direct formation theory for the formation of dolomite in CO 2 was proposed. But, it is not known whether or not the lower decomposition temperature depends on CO 2 pressure.
Journal Article
Infrared study of sepiolite and paly-gorskite on heating
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Hydrothermal Synthesis of Magadiite and Kenyaite
TL;DR: In this article, Magadiite and K-kenyaite were synthesized after 16h at 185°C from a suspension with molar ratios of H2O/SiO2=18.95-23.23 and NaOH/K2CO3=0.23, respectively.
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Thermal expansion of hydroxyapatite-β-tricalcium phosphate ceramics
TL;DR: The thermal lattice expansion of calcined hydroxyapatite and β-tricalcium phosphate single-phase powder was investigated by high-temperature X-ray diffractometry as discussed by the authors.