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Calorimetric signature of structural heterogeneity in a ternary silicate glass

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Authors:
  • Zhang, Yanfei ;
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    Department of Chemistry and Bioscience, The Faculty of Engineering and Science, Aalborg University
  • Yang, G. ;
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    Xi'an Jiaotong University
  • Yue, Yuanzheng
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    Orcid logo0000-0002-6048-5236
    Department of Chemistry and Bioscience, The Faculty of Engineering and Science, Aalborg University
DOI:
10.1111/jace.12562
Abstract:
We investigate the structural heterogeneity in a silicate glass by hyperquenching–annealing–calorimetry approach. The results show a striking phenomenon: two separated sub-Tg relaxation peaks appear on the calorimetric curve of the hyperquenched CaO–MgO–SiO2 glass, implying the existence of two distinct structural domains of higher and lower potential energies, respectively. The higher energy domains in nanoscale are so unstable that they become ordered during hyperquenching. This is verified by the high-resolution transmission electron microscopy image exhibiting nanoordered domains in the glass matrix. The higher energy domains relax similar to a strong glass phase, whereas the lower energy domains do similar to a fragile one.
Type:
Journal article
Language:
English
Published in:
American Ceramic Society. Journal, 2013, Vol 96, Issue 10, p. 3035-3037
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2013
Scientific Level:
Scientific
ID:
250860007

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