A Gravity Variometer Made of Vitreous Silica
نویسندگان
چکیده
منابع مشابه
Modeling vitreous silica bilayers
Theoretical modeling is presented for a freestanding vitreous silica bilayer which has recently been synthesized and characterized experimentally in landmark work. While such two-dimensional continuous random covalent networks should likely occur on energetic grounds, no synthetic pathway had been discovered previously. Here the bilayer is modeled using a computer assembly procedure initiated f...
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Molecular dynamics (MD) simulations can be used to gain insights into the atomic level structure of glasses not easily accessible to experiment. However, to reliably obtain accurate results it is essential to chose the proper force fields (FF), the proper length of the simulation cell, and the proper cooling cycle to generate the 300K structure from the melt. Herein we establish guidelines for ...
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It is a challenge to calorimetrically determine the glass transition temperature (Tg) of vitreous silica. Here, we demonstrate that this challenge mainly arises from the extremely high sensitivity of the Tg to the hydroxyl content, but also from decrease of the Tg with repeating the calorimetric scans. It is known that the liquid fragility (i.e., the speed of the viscous slow-down of a supercoo...
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A model containing an extra species of tunneling two-level systems, characterized by a lower threshold 0.3 K of the tunneling matrix element, a coupling constant 0.17 eV for interaction with longitudinal sound waves, and two more parameters for the shape of their distribution function, can account for the temperature dependences of fast specific heat, thermal conductivity, sound.absorption and ...
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ژورنال
عنوان ژورنال: Proceedings of the Imperial Academy
سال: 1928
ISSN: 0369-9846,1881-1140
DOI: 10.2183/pjab1912.4.300