Synthesis of Na-β″-Al2O3 electrolytes by microwave sintering precursors derived from the sol–gel method
Synthesis of Na-β″-Al2O3 electrolytes by microwave sintering precursors derived from the sol–gel method
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DOI：
10.1016/j.jallcom.2010.03.038
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发表时间：
2010-05
影响因子：
6.2
通讯作者：
J. Wang;Xiaoliang Jiang;Wei Xiaoling;Hui Yang;Xiao-dong Shen
中科院分区：
文献类型：
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作者：
J. Wang;Xiaoliang Jiang;Wei Xiaoling;Hui Yang;Xiao-dong Shen
本文采用微波烧结辅助溶胶-凝胶技术合成了Na-β″- al2o3电解质。采用x射线衍射（XRD）、扫描电镜（SEM）、差示扫描量热法（TG-DSC）和傅里叶变换红外光谱（FT-IR）对前驱体粉末和微波烧结球团进行了系统的研究。采用交流阻抗谱法测定了微波烧结球团的离子电导率。结果表明，溶胶-凝胶法制备的前驱体粉体煅烧温度是影响球团中Na-β″- al2o3纯度的关键因素。850℃煅烧制得的烧结球团纯度为94.4%，烧结球团密度为理论密度的98.91%。此外，通过交流阻抗测量，样品在300°C时的离子电导率为0.01085Scm−1。
Na-β″-Al2O3electrolytes were synthesized by the microwave sintering assisted sol–gel technique in this study. The precursor powders and microwave-sintered pellets were systematically investigated by means of X-ray diffraction (XRD), scanning electron microscope (SEM), differential scanning calorimetry (TG–DSC) and Fourier transform infrared (FT-IR) spectroscopy. The ionic conductivity of the microwave-sintered pellets was also measured based on AC impedance spectroscopy. It was found that the calcining temperature of the precursor powders derived from the sol–gel method was the key factor to affect the purity of Na-β″-Al2O3in the pellets. The sintered pellets prepared from the powders calcined at 850°C exhibited a purity of 94.4% Na-β″-Al2O3and the density of the sintered pellets was 98.91% of the theoretical density of Na-β″-Al2O3. In addition, the sample showed an ionic conductivity of 0.01085Scm−1at 300°C by AC impedance measurement.