Crystallization kinetics of lithium aluminum germanium phosphate glass by DSC technique

  • Kun He (何坤)
  • Yanhang Wang
  • Chengkui Zu (祖成奎)
  • Yonghua Liu
  • Huifeng Zhao
  • Bin Han
  • Jiang Cheng
Article

Abstract

The crystallization kinetics of Li2O-Al2O3-GeO2-P2O5 (LAGP) glass fabricated via the conventional melt-quenching method was studied by differential scanning calorimetry (DSC) under nonisothermal condition at different heating rates. The activation energy of glass transition Eg is 634.4 kJ/mol, indicating that LAGP glass is easy to crystallize at an elevated temperature. The activation energy of crystallization E c and Avrami index n obtained from Matusita’s model are 442.01 kJ/mol and 1.7, respectively. The value of n reveals that bulk crystallization predominates slightly over surface crystallization during crystallization process. LAGP glass-ceramics after different heat treatments have the same crystalline phases determined as major phase LiGe2(PO4)3, with AlPO4 and GeO2 as their impurity phases.

Key words

phosphate glass crystallization kinetics thermal stability XRD analysis 

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Copyright information

© Wuhan University of Technology and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Kun He (何坤)
    • 1
  • Yanhang Wang
    • 1
  • Chengkui Zu (祖成奎)
    • 1
  • Yonghua Liu
    • 1
  • Huifeng Zhao
    • 1
  • Bin Han
    • 1
  • Jiang Cheng
    • 1
  1. 1.Quartz and Special Glasses InstituteChina Building Materials AcademyBeijingChina

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