Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 014202 |
| Fachzeitschrift | Physical Review B - Condensed Matter and Materials Physics |
| Jahrgang | 76 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - 11 Juli 2007 |
Abstract
A study of thermodynamic properties and structure of sodium borosilicate glasses with a range of pressure-temperature histories is presented. It is demonstrated how differences in the pressure-temperature path of the liquid during cooling may result in glasses with identical short-range structure and molar volume but different potential energies and, thus, different mid- or long-range structures. Rates of changes of molar volume, excess enthalpy, and boron coordination with changing fictive pressure and fictive temperature are reported. A structure-energy map is given, and paths for transitions under constant pressure, as well as between different pressures are shown. It is shown for pressures between atmospheric and 500 MPa that similar rates of cooling produce similar relative variations in fictive temperature in boron coordination environment and in the potential energy as compared to a given reference state. These results indicate that the rate of configurational entropy generation is independent of pressure in this range.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
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in: Physical Review B - Condensed Matter and Materials Physics, Jahrgang 76, Nr. 1, 014202, 11.07.2007.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Structure-energy map of alkali borosilicate glasses
T2 - Effects of pressure and temperature
AU - Wondraczek, Lothar
AU - Sen, Sabyasachi
AU - Behrens, Harald
AU - Youngman, Randall E.
PY - 2007/7/11
Y1 - 2007/7/11
N2 - A study of thermodynamic properties and structure of sodium borosilicate glasses with a range of pressure-temperature histories is presented. It is demonstrated how differences in the pressure-temperature path of the liquid during cooling may result in glasses with identical short-range structure and molar volume but different potential energies and, thus, different mid- or long-range structures. Rates of changes of molar volume, excess enthalpy, and boron coordination with changing fictive pressure and fictive temperature are reported. A structure-energy map is given, and paths for transitions under constant pressure, as well as between different pressures are shown. It is shown for pressures between atmospheric and 500 MPa that similar rates of cooling produce similar relative variations in fictive temperature in boron coordination environment and in the potential energy as compared to a given reference state. These results indicate that the rate of configurational entropy generation is independent of pressure in this range.
AB - A study of thermodynamic properties and structure of sodium borosilicate glasses with a range of pressure-temperature histories is presented. It is demonstrated how differences in the pressure-temperature path of the liquid during cooling may result in glasses with identical short-range structure and molar volume but different potential energies and, thus, different mid- or long-range structures. Rates of changes of molar volume, excess enthalpy, and boron coordination with changing fictive pressure and fictive temperature are reported. A structure-energy map is given, and paths for transitions under constant pressure, as well as between different pressures are shown. It is shown for pressures between atmospheric and 500 MPa that similar rates of cooling produce similar relative variations in fictive temperature in boron coordination environment and in the potential energy as compared to a given reference state. These results indicate that the rate of configurational entropy generation is independent of pressure in this range.
UR - http://www.scopus.com/inward/record.url?scp=34447311386&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.76.014202
DO - 10.1103/PhysRevB.76.014202
M3 - Article
AN - SCOPUS:34447311386
VL - 76
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 1
M1 - 014202
ER -