High temperature Na₂O vapor conversion of α-Al₂O₃ with different concentrations of yttria stabilized zirconia (YSZ) was used to produce Na-β″-Al₂O₃ solid electrolyte (BASE) materials. The influence of different ratios of yttria (YSZ-3 and YSZ-8) on conversion and material properties (ionic conductivity and flexural strength) was also investigated. Extent of conversion to Na-β″-Al₂O₃ was calculated by semi-quantitative XRD phase analysis. Al₂O₃ composites with 20% or less YSZ were incompletely converted to Na-β″-Al₂O₃ after 2 h at 1450 °C. Al₂O₃ composites with 30–40% YSZ-3 appear fully converted by XRD but have lower conductivity and higher strength compared to conventionally sintered Na-β″-Al₂O₃ composites with the same concentration of YSZ-3. SEM of the materials indicated differences in morphology and grain size. XRD of Al₂O₃ composites with YSZ-8 showed significantly lower conversion than those with YSZ-3. This is attributed to the larger grain size of YSZ-8, which limits the homogeneity of composites with Al₂O₃ and thus does not assist in oxygen diffusion as well as YSZ-3. Although the vapor converted BASE materials tended to have lower conductivities at 300 °C, they have lower activation energies (0.20 eV) compared to conventionally sintered Na-β″-Al₂O₃ composites (0.30 eV) and comparatively higher conductivity at ambient temperature. Vapor converted BASE materials also have better mechanical properties, which should allow fabrication of thinner electrodes.

高温的Na ₂ ö蒸气的α-Al转换₂ ö ₃用不同浓度的稳定的氧化锆（YSZ）的氧化钇，制作的Na-β“-Al ₂ ö ₃的固体电解质（BASE）的材料。还研究了不同比例的氧化钇（YSZ-3和YSZ-8）对转化率和材料性能（离子电导率和抗弯强度）的影响。通过半定量XRD相分析计算了转化为Na-β''-Al ₂ O _3的程度。在1450°C下放置2 h后，具有20％或更少YSZ的Al ₂ O ₃复合材料不完全转化为Na-β''-Al ₂ O ₃。铝₂具有30％至40％的YSZ-3的O ₃复合材料似乎通过XRD完全转化，但与具有相同浓度的YSZ-3的常规烧结Na-β''-Al ₂ O ₃复合材料相比，具有更低的电导率和更高的强度。材料的SEM显示出形态和晶粒尺寸的差异。具有YSZ-8的Al ₂ O ₃复合材料的XRD显示出明显低于具有YSZ-3的Al ₂ O ₃复合材料的转化率。这归因于YSZ-8的较大晶粒尺寸，这限制了Al ₂ O ₃复合材料的均质性因此不像YSZ-3那样有助于氧气的扩散。尽管经蒸气转化的BASE材料在300°C时倾向于具有较低的电导率，但与常规烧结的Na-β''-Al ₂ O ₃复合材料（0.30 eV）相比，它们具有较低的活化能（0.20 eV）和在室温下具有相对较高的电导率。蒸气转化的BASE材料也具有更好的机械性能，这应允许制造更薄的电极。