Crystallization behavior and ionic conductivity of NASICON type glass-ceramics containing different amounts of B2O3

Banafsheh Zarabian, B. Eftekhari Yekta, S. Banijamali
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引用次数: 1

Abstract

In this research, glass-ceramics belonging to the system of Li2O-TiO2-P2O5 were prepared by the addition of different amounts of B2O3. The glass formation ability of the starting glass materials along with the crystallization trend as well as ionic conductivity of the corresponding glass-ceramics were also examined. Starting glasses were obtained through the melt quenching technique and glass-ceramics specimens were prepared through one-step heat treatment. The glass-ceramic samples were then examined through X-ray diffractometry, differential thermal analysis, electrochemical impedance spectroscopy, and scanning electron microscopy. According to the obtained results, the addition of a 2.5 mole% of B2O3 to the glass composition led to a sharp increase in ionic conductivity at room temperature. So that the bulk conductivity of the specimen heat treated at 950 °C for 2 h was measured to be 1.17 × 10-3 Scm-1, which was 10 times bigger than that of the base glass-ceramic with no additive. It also decreased the crystallization temperature and viscosity of the parent glass, resulting in increased crystallinity while further addition of B2O3 drained the conductivity and crystallinity of glass-ceramics.
含不同B2O3量的NASICON型微晶玻璃的结晶行为和离子电导率
在本研究中,通过添加不同量的B2O3制备了Li2O-TiO2-P2O5体系的微晶玻璃。考察了初始玻璃材料的成玻璃能力、晶化趋势以及相应微晶玻璃的离子电导率。采用熔体淬火技术制备了初始玻璃,采用一步热处理工艺制备了微晶玻璃试样。然后通过x射线衍射、差热分析、电化学阻抗谱和扫描电子显微镜对玻璃陶瓷样品进行检测。根据得到的结果,在玻璃成分中加入2.5摩尔%的B2O3会导致室温下离子电导率的急剧增加。经950℃热处理2 h后,测得样品的体电导率为1.17 × 10-3 cm-1,是未添加添加剂的玻璃陶瓷基体的10倍。B2O3的加入降低了玻璃的结晶温度和结晶粘度,使玻璃的结晶度增加,而B2O3的进一步加入使玻璃的电导率和结晶度下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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