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Lithium rich phosphate glass: Crystallization kinetics, structural and conduction characteristics
Prashant Dabas, Krishnaswamy Hariharan
Published in
2012
Volume: 358
   
Issue: 2
Pages: 252 - 260
Abstract
Crystallization kinetic studies of Li+ ion conducting mol% 60Li2O-40P2O5 glass indicate a 2-dimensional crystal growth mechanism as compared to the 3-dimensional growth mechanism for LiPO3 glass (mol% 50Li2O-50P2O5). Spectroscopic studies reveal that the structures of these two glass compositions differ considerably resulting in different mechanisms for crystal growth. Isothermal ionic conductivity studies further support 2-dimensional crystallization in mol% 60Li2O-40P2O5 glass. Above the glass transition temperature the ionic conductivity deviates from the usual Arrhenian temperature dependence due to the additional effect of the movement of the phosphate polymeric chains in the glass network. The ionic conductivity of the glass ceramic corresponding to the mol% 60Li 2O-40P2O5 glass behaves in an Arrhenian fashion with an activation energy of 1.21 eV, much higher than that of 0.77 eV for the glass. Further, it is established using canonical scaling that the mechanism for ionic conduction is temperature independent. © 2011 Elsevier B.V. All rights reserved.
About the journal
JournalJournal of Non-Crystalline Solids
ISSN00223093
Open AccessNo
Concepts (24)
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    3-DIMENSIONAL
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    CRYSTAL GROWTH MECHANISM
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    Different mechanisms
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    Glass compositions
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    GLASS NETWORK
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    Growth mechanisms
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    Ion-conducting
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    PHOSPHATE GLASS
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    Polymeric chain
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    Spectroscopic studies
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    Temperature dependence
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    Activation energy
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    Crystal growth
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    Crystallization kinetics
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    Glass
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    Glass ceramics
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    Growth kinetics
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    Ionic conductivity
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    Kinetics
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    Lithium
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    POLYMERIC GLASS
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    Spectroscopic analysis
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    Spectroscopy
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    Glass transition