Crystallization Kinetics of Lithium Aluminum Germanium Phosphate Glass by DSC Technique
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2012年第1期
论文作者：何坤 祖成奎
文章页码：63 - 66
摘 要：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 non-isothermal 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 Ec 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.
何坤，祖成奎
Quartz and Special Glasses Institute, China Building Materials Academy
摘 要：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 non-isothermal 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 Ec 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.
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