Optimization of Al<sub class="a-plus-plus">2sub>O<sub class="a-plus-plus">3sub> and Li<sub class="a-plus-plus">3sub>BO<sub class="a-plus-plus">3sub> Content as Sintering Additives of Li<sub class="a-plus-plus">7−ss="a-plus-plus">x sub>La<sub class="a-plus-plus">2.95sub>Ca<sub class="a-plus-plus">0.05sub>ZrTaO<sub class="a

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• 作者：Nataly Carolina Rosero-Navarro ; Akira Miura…
• 关键词：Ca–Ta doped LLZ ; sintering additives ; Al2O3 ; Li3BO3 ; Li ion conductivity
• 刊名：Journal of Electronic Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：46
• 期：1
• 页码：497-501
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
• 出版者：Springer US
• ISSN：1543-186X
• 卷排序：46

文摘

Simultaneous effect of Al<sub>2sub>O<sub>3sub> and Li<sub>3sub>BO<sub>3sub> additions on sintering behavior and Li-ion conductivity of Li<sub>7−ss="EmphasisTypeItalic ">xsub>La<sub>2.95sub>Ca<sub>0.05sub>ZrTaO<sub>12sub> (LLCZT) garnet electrolyte sintered at 900°C (10 h) is evaluated. The crystal phase and microstructure of the different composites were evaluated by x-ray diffraction and scanning electron microscopy (SEM), respectively. Electrical properties of the composites with high relative densities (95%) were examined by impedance spectroscopy. The cubic phase was formed for LLCZT sintered with 0–0.21 mol of Al<sub>2sub>O<sub>3sub> and 0.70 mol–0.80 mol of Li<sub>3sub>BO<sub>3sub>. The excess of Al<sub>2sub>O<sub>3sub> (0.22 mol) led to the formation of secondary phases. SEM observation revealed the good interconnection between LLCZT grains and the distribution of the glassy phase formed by Li<sub>3sub>BO<sub>3sub> and Al<sub>2sub>O<sub>3sub>. Effective combination of 0.21 mol of Al<sub>2sub>O<sub>3sub> and 0.80 mol of Li<sub>3sub>BO<sub>3sub> produced denser material with high relative density of 95% and high Li-ion conduction of 1 × 10−4 S/cm at 32°C.