Crystallization Kinetics of Lithium Aluminum Germanium Phosphate Glass by DSC Technique

武汉理工大学学报-材料科学版(英文版), 2012, (1): 63-66. doi: 10.1007/sl1595-012-0408-4

^1, , ^2, , ^3, , ^4, , ^5, , ^6, , ^7,

1.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

2.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

3.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

4.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

5.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

6.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

7.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

基金项目: Funded by National Natural Science Foundation of China (NSFC)(60808024)

Crystallization Kinetics of Lithium Aluminum Germanium Phosphate Glass by DSC Technique

HE Kun ^1, , WANG Yanhang ^2, , ZU Chengkui ^3, , LIU Yonghua ^4, , ZHAO Huifeng ^5, , HAN Bin ^6, , CHENG Jiang ^7,

1.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

2.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

3.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

4.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

5.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

6.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

7.Quartz and Special Glasses Institute, China Building Materials Academy, Beijing 100024, China

Keywords： phosphate glass

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 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.

参考文献

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[2]	Starink MJ.;Zahra AM. .DETERMINATION OF THE TRANSFORMATION EXPONENT S FROM EXPERIMENTS AT CONSTANT HEATING RATE[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,1997(1/2):179-189.

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Crystallization Kinetics of Lithium Aluminum Germanium Phosphate Glass by DSC Technique

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