A5087136962- High-pressure geophysics and materials
- Crystal Structures and Properties
- Geological and Geochemical Analysis
- Inorganic Fluorides and Related Compounds
- earthquake and tectonic studies
- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Clay minerals and soil interactions
- Advanced materials and composites
The University of Tokyo
2021-2024
Peking University
2018-2019
Northeastern University
2015
Brucite, Mg(OH)2 (P3̅m1, Z = 1), is a prototype material for studying hydrogen bonds in solid hydroxides. In this study, substitutional effects of fluorine (F) on the hydrogen-bonding geometries hydrogenated and deuterated brucite were investigated under ambient conditions at high pressure using combined experimental methods neutron powder diffraction, Raman spectroscopy, infrared (IR) spectroscopy. Under conditions, diffraction results showed that F substitution decreased donor–acceptor...
Abstract Fe-bearing phase E coexisting with ringwoodite and wadsleyite has been synthesized at near-geotherm temperatures in hydrous KLB-1 peridotite compositions held 18 19 GPa, 1400 °C for 27 h. The long heating duration time of syntheses implies that can be a stable component the mantle under conditions. Single-crystal X-ray diffraction analyses show M1 octahedral site is 72.1–75.2 at% occupied, whereas M2 tetrahedral Si sites are 2.4–2.9 18.9–19.8 respectively. occupancies positive...
The diamond thick layers prepared using chemical vapor deposition (CVD) methods have been treated at high pressures and temperatures (HP-HT). It was found that the Vickers hardness of HP-HT bulks nearly two times as starting CVD samples. samples 8 GPa 1800°C is ∼80 a loading force 49 N, close to single-crystal (∼100 GPa). In addition, oxidation resistance also enhanced greatly after treatments, diamondization sp2 bonded carbon in could occur 7–8 1600–1800°C. conditions our works are much...