Influence of Al2O3 additions on crystallization mechanism and conductivity of Li2O–Ge2O–P2O5 glass–ceramics
| Autor: | Han Bin, He Kun, Wang Yanhang, Chen Jiang, Zhao Huifeng, Zu Chengkui, Liu Yonghua, Ma Juanrong |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Analytical chemistry chemistry.chemical_element Germanium Conductivity Condensed Matter Physics Microstructure Electronic Optical and Magnetic Materials law.invention chemistry Impurity law Phase (matter) Ionic conductivity Lithium Electrical and Electronic Engineering Crystallization |
| Zdroj: | Physica B: Condensed Matter. 406:3947-3950 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2011.07.033 |
| Popis: | The crystallization mechanism and conductivity of lithium aluminum germanium phosphate [LAGP] glass–ceramics fabricated from Li 1+ x Al x Ge 2− x (PO 4 ) 3 ( x =0.0–0.7) glass system were investigated as a function of Al 2 O 3 additions. A non-isothermal analysis was performed to study the crystallization behavior of LAGP glass–ceramics at various heating rates (5–25K min −1 ) by the Kissinger equation and the Augis–Bennett equation, illustrating volume crystallization for the glass-ceramics. The crystal identification and microstructure in glass–ceramics containing various Al 2 O 3 contents were analyzed by means of XRD and FESEM. The main phase of the glass–ceramics was found to be LiGe 2 (PO 4 ) 3 , with AlPO 4 as the impurity phase. Additionally the highest total ionic conductivity (5.8×10 −4 S/cm) at room temperature was obtained when x =0.5 for Li 1+ x Al x Ge 2− x (PO 4 ) 3 ( x =0.0–0.7) glass–ceramics, suggesting that it was a promising electrolyte for practical application in all-solid-state lithium batteries. |
| Databáze: | OpenAIRE |
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