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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Precursor glass stability, microstructure and ionic conductivity of glass-ceramics from the Na1+xAlxGe2-x(PO4)(3) NASICON series
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Precursor glass stability, microstructure and ionic conductivity of glass-ceramics from the Na1+xAlxGe2-x(PO4)(3) NASICON series

机译：来自Na1 + Xalge2-X（PO4）（3）Nasicon系列的玻璃陶瓷的前体玻璃稳定性，微观结构和离子电导率

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摘要

Glass-ceramics from the Na1+xAlxGe2-x(PO4)(3) system were synthesized for 0 <= x <= 1.0. The stability parameters of precursor glasses were analyzed indicating that systematic additions of aluminum in the NaGe2(PO4)(3) composition improve the precursor glass forming ability. Considering the glass-ceramics, it is observed that an increase in the aluminum content, x, causes a decrease in the activation energy for conduction, and thus an increase in the ionic conductivity. As x increases, beyond the corresponding increase in the charge carrier (Na+) concentration, it is also observed an increase in the unit cell volume of the NASICON structure, which may also contribute to the enhancement of ionic conductivity. Concerning the microstructure, the addition of aluminum provokes an increase in the average grain-size of the obtained glass-ceramics. Ionic conductivity increases up to x = 0.8 but remains constant within the experimental error for the x = 1.0 sample, probably due to a limit in the solid solution range. Ionic conductivity of composition x = 0.8 is still improved by applying higher crystallization temperatures, which decreases the activation energy for ionic conduction.
机译：来自NA1 + XALXGE2-X（PO4）（3）系统的玻璃陶瓷被合成0 <= x <= 1.0。分析了前体玻璃的稳定性参数，表明Nage2（PO4）（3）组分中的铝的系统添加改善前体玻璃形成能力。考虑到玻璃陶瓷，观察到铝含量X的增加导致导致的激活能量减小，从而增加离子电导率。随着x增加，除了相应的电荷载体（Na +）浓度的增加之外，还观察到Nasicon结构的单位细胞体积增加，这也可能有助于增强离子电导率。关于微观结构，铝的加入引起所得玻璃陶瓷的平均晶粒尺寸的增加。离子电导率增加到x = 0.8，但在x = 1.0样品的实验误差内保持恒定，可能是由于固体解决方案范围内的限制。通过施加更高的结晶温度仍然改善组合物X = 0.8的离子电导率，这降低了离子传导的活化能量。

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