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Title: Effects of Surface Orientation and Termination Plane on Glass‐to‐Crystal Transformation of Lithium Disilicate by Molecular Dynamics Simulations

Abstract

Glass‐to‐crystal transformation of lithium disilicate is studied using molecular dynamics simulations using an effective partial charge potential. The structural evolution of the interface between glassy and crystalline lithium disilicate is analyzed to simulate crystallization of glass on pre‐existing crystal seeds. Besides previously used atomic number density, the distribution of Q n species (Si tetrahedra with n bridging oxygen) is shown to be an effective parameter for following this transformation quantitatively. The early stages of crystal growth are significantly affected by the orientation and termination of the surface of adjacent crystal, as indicated by calculated atomic density, partial ordering, atomic segregation, and an increase in Q 3 concentration. In particular, under‐coordinated Si within the outer crystal layer is found to be most effective in transforming the amorphous structure toward crystallinity. The increase in Q 3 in the glass close to interface region most clearly shows the initial stage of lithium disilicate crystal growth.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Institute for Functional Materials and Devices Lehigh University Bethlehem PA 18015 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1786543
Grant/Contract Number:  
SC0005010
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Physica Status Solidi B. Basic Solid State Physics
Additional Journal Information:
Journal Name: Physica Status Solidi B. Basic Solid State Physics Journal Volume: 258 Journal Issue: 9; Journal ID: ISSN 0370-1972
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English

Citation Formats

Sun, Wei, Dierolf, Volkmar, and Jain, Himanshu. Effects of Surface Orientation and Termination Plane on Glass‐to‐Crystal Transformation of Lithium Disilicate by Molecular Dynamics Simulations. Germany: N. p., 2020. Web. doi:10.1002/pssb.202000427.
Sun, Wei, Dierolf, Volkmar, & Jain, Himanshu. Effects of Surface Orientation and Termination Plane on Glass‐to‐Crystal Transformation of Lithium Disilicate by Molecular Dynamics Simulations. Germany. https://doi.org/10.1002/pssb.202000427
Sun, Wei, Dierolf, Volkmar, and Jain, Himanshu. Sun . "Effects of Surface Orientation and Termination Plane on Glass‐to‐Crystal Transformation of Lithium Disilicate by Molecular Dynamics Simulations". Germany. https://doi.org/10.1002/pssb.202000427.
@article{osti_1786543,
title = {Effects of Surface Orientation and Termination Plane on Glass‐to‐Crystal Transformation of Lithium Disilicate by Molecular Dynamics Simulations},
author = {Sun, Wei and Dierolf, Volkmar and Jain, Himanshu},
abstractNote = {Glass‐to‐crystal transformation of lithium disilicate is studied using molecular dynamics simulations using an effective partial charge potential. The structural evolution of the interface between glassy and crystalline lithium disilicate is analyzed to simulate crystallization of glass on pre‐existing crystal seeds. Besides previously used atomic number density, the distribution of Q n species (Si tetrahedra with n bridging oxygen) is shown to be an effective parameter for following this transformation quantitatively. The early stages of crystal growth are significantly affected by the orientation and termination of the surface of adjacent crystal, as indicated by calculated atomic density, partial ordering, atomic segregation, and an increase in Q 3 concentration. In particular, under‐coordinated Si within the outer crystal layer is found to be most effective in transforming the amorphous structure toward crystallinity. The increase in Q 3 in the glass close to interface region most clearly shows the initial stage of lithium disilicate crystal growth.},
doi = {10.1002/pssb.202000427},
journal = {Physica Status Solidi B. Basic Solid State Physics},
number = 9,
volume = 258,
place = {Germany},
year = {Sun Dec 06 00:00:00 EST 2020},
month = {Sun Dec 06 00:00:00 EST 2020}
}

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