Acoustic properties and density of polyurea at pressure up to 13.5 GPa through Brillouin scattering spectroscopy
نویسندگان
چکیده
منابع مشابه
Brillouin scattering and X-ray diffraction of San Carlos olivine: direct pressure determination to 32 GPa
The single-crystal elastic moduli of San Carlos olivine, (Mg0.9Fe0.1)2SiO4, were determined at seven pressures between 2.5 and 32.5 GPa by Brillouin spectroscopy in a diamond anvil cell. The unit cell volume was also determined at each pressure (and ambient pressure) by single-crystal X-ray diffraction. The shear elastic moduli exhibit non-linear pressure dependencies. In particular, a non-line...
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Intriguing seismic observations have been made for the bottom 400 km of Earth's mantle (the D'' region) over the past few decades, yet the origin of these seismic structures has not been well understood. Recent theoretical calculations have predicted many unusual changes in physical properties across the postperovskite transition, perovskite (Pv) --> postperovskite (PPv), that may provide expla...
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Brillouin scattering allows the determination of acoustic velocities and adiabatic elastic moduli in matter. These data are crucial in many areas of science, such as fundamental physics, geosciences and technology, especially when measured as a function of the density (pressure). In this paper, we present a review of the work performed on Brillouin scattering under high pressure in diamond anvi...
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Acoustic properties of the fluorinated copolymer Kel F-800 were determined with Brillouin spectroscopy up to pressures of 85 GPa at 300 K. This research addresses outstanding issues in high-pressure polymer behavior, as to date the acoustic properties and equation of state of any polymer have not been determined above 20 GPa. We observed both longitudinal and transverse modes in all pressure do...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2018
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.5031427