DOI: 10.1063/1.1727238. Two-State Model for the Free Volume of Vitreous B2O3

Two-State Model for the Free Volume of Vitreous B2O3

10.1063/1.1727238

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

New data on the density of B2O3 from 25° to 230°C are given. A two-state equation of state for the volume is presented which fits the volume data from 350° to 1400°C. A specific structure for the two states is suggested and shown to be consistent with Raman data. Below 350°C and at high pressures the data indicated that the two-state expressions for free volume still hold but the volume of the close-packed structure becomes temperature and pressure dependent. The viscosity of B2O3 from the glass transition up to 1400°C and at high pressure is consistent with the equation of state and the hybrid equation of Macedo and Litovitz. The viscosity values above 1400°C indicate a breakup of the two-state structures and the beginning of multistate behavior which results in a temperature-dependent activation energy. The onset of this effect causes the ``apparent'' activation energy to increase above 1400°C.

Bibliography

Macedo, P. B., Capps, W., & Litovitz, T. A. (1966). Two-State Model for the Free Volume of Vitreous B2O3. The Journal of Chemical Physics, 44(9), 3357â3364.

Authors 3

P. B. Macedo (first)
W. Capps (additional)
T. A. Litovitz (additional)

References 25 Referenced 102

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{'key': '2024020900583431800_r3'}
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{'key': '2024020900583431800_r16'}
{'key': '2024020900583431800_r17', 'first-page': '206', 'volume': '4', 'year': '1963', 'journal-title': 'Phys. Chem. Glasses'} / Phys. Chem. Glasses (1963)
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Dates

Type	When
Created	20 years, 7 months ago (Jan. 9, 2005, 3:17 a.m.)
Deposited	1 year, 6 months ago (Feb. 8, 2024, 7:58 p.m.)
Indexed	3 hours, 43 minutes ago (Aug. 22, 2025, 12:46 a.m.)
Issued	59 years, 3 months ago (May 1, 1966)
Published	59 years, 3 months ago (May 1, 1966)
Published Print	59 years, 3 months ago (May 1, 1966)

Funders 0

None

BibTeX

@article{Macedo_1966, title={Two-State Model for the Free Volume of Vitreous B2O3}, volume={44}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1727238}, DOI={10.1063/1.1727238}, number={9}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Macedo, P. B. and Capps, W. and Litovitz, T. A.}, year={1966}, month=may, pages={3357–3364} }

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