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Predicting the dissolution rate of borosilicate glasses using QSPR analysis based on molecular dynamics simulations

Journal Article · · Journal of the American Ceramic Society
DOI:https://doi.org/10.1111/jace.17857· OSTI ID:1781134
 [1];  [2];  [3];  [3];  [1];  [3];  [3];  [4];  [5]
  1. Department of Materials Science and Engineering University of North Texas Denton TX USA
  2. Department of Materials Science and Engineering University of North Texas Denton TX USA, Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA USA
  3. CEA DEN DE2D University of Montpellier Marcoule France
  4. Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab) University of California Los Angeles CA USA
  5. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA USA
Abstract

Quantitative Structure Property Relationship (QSPR) analysis based on molecular dynamics (MD) simulations is a promising approach for establishing the composition‐property relationships of glasses and other materials with complex structures. A series of 20 borosilicate, aluminosilicate, and boroaluminosilicate glasses have been modeled using MD simulations with recently developed effective potentials. Short‐ and medium‐range structures of these glasses were analyzed and, based on the structural information, QSPR analysis of the initial dissolution rates ( r 0 ) of these glasses that were measured at 90°C and pH 9 by using various structural descriptors such as percentage of bridging oxygen species, network connectivity, and average ring size. The structural descriptor, F net , which contains both energetic information such as single bond strength and structural information such as cation coordination number and Q n distribution, was also used. It was found that while the overall network connectivity, average ring size and F net provide reasonable correlations with r 0 of studied glasses, F net gives the best correlation among the descriptors. For glasses that show incongruent dissolution, it was found that modification of glass compositions to account for preferential release of modifier cations is necessary to achieve best correlations. The findings were discussed with results of recent studies on evaluating the compositional dependence of glass dissolution behavior using the topological‐constraints‐based models.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0016584
OSTI ID:
1781134
Alternate ID(s):
OSTI ID: 1810298
Journal Information:
Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 9 Vol. 104; ISSN 0002-7820
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United States
Language:
English

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