Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 355, Issue 4-5, Pages 323-326Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2008.11.005
Keywords
Composition; Glasses; Silica; Thermal properties; Structural relaxation; Water in glass
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A matrix of synthetic fused silica samples with OH contents from 30 to 1300 ppm and of a fictive temperature from 1000 to 1300 degrees C has been characterized regarding their thermal expansion with high precision. The thermal expansion increases with fictive temperature and drops with OH content. Although fictive temperature and OH are coupled due to the influence of OH on the relaxation of the network, an independent influence of the OH content on thermal expansion has been observed. This may provide a deeper insight into the impact of impurities incorporated into the fused silica network. (C) 2008 Elsevier B.V. All rights reserved.
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