Abstract
The resonant sphere technique has been used to measure the temperature variation of the acoustic shear loss of vitreous silica up to 1100°C. The acoustic loss near room temperature, which is on the high temperature end of the 50°K loss peak, was found to be dependent upon fictive temperature, the state of oxidation, and, through the state of oxidation, may be dependent upon the OH or Cl content. A minimum loss occurs above room temperature and for synthesized silicas the loss level is comparable to single-crystal materials. Above the minimum loss, the loss process appears to be thermally activated with an approximate activation energy of 0.5 eV. This low activation energy suggests the diffusion of a network modifier such as hydrogen as a possible cause of the high temperature loss.
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Dates
Type | When |
---|---|
Created | 21 years, 6 months ago (Feb. 9, 2004, 11:56 a.m.) |
Deposited | 1 year, 7 months ago (Feb. 1, 2024, 8:47 p.m.) |
Indexed | 2 days, 15 hours ago (Sept. 3, 2025, 6:42 a.m.) |
Issued | 55 years, 8 months ago (Jan. 1, 1970) |
Published | 55 years, 8 months ago (Jan. 1, 1970) |
Published Print | 55 years, 8 months ago (Jan. 1, 1970) |
@article{Fraser_1970, title={Acoustic Loss of Vitreous Silica at Elevated Temperatures}, volume={41}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1658378}, DOI={10.1063/1.1658378}, number={1}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Fraser, David B.}, year={1970}, month=jan, pages={6–11} }