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Effects of fabrication conditions on mechanical properties and microstructure of duplex β″-Al_2O_3 solid electrolyte

机译：制备条件对双相β” -Al_2O_3固体电解质力学性能和微观结构的影响

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摘要

Na-beta batteries are an attractive technology as a large-scale electrical energy storage for grid applications. However, additional improvements in performance and cost are needed for wide market penetration. To improve cell performance by minimizing polarizations, reduction of electrolyte thickness was attempted using a duplex structure consisting of a thin dense electrolyte layer and a porous support layer. In this paper, the effects of sintering conditions, dense electrolyte thickness, and cell orientation on the flexural strength of duplex BASEs fabricated using a vapor phase approach were investigated. It is shown that sintering at temperatures between 1500 and 1550℃ results in fine grained microstructures and the highest flexural strength after conversion. Increasing thickness of the dense electrolyte has a small impact on flexural strength, while the orientation of load such that the dense electrolyte is in tension instead of compression has major effects on strength for samples with a well-sintered dense electrolyte.
机译：Na-β电池是一种有吸引力的技术，可作为电网应用的大规模电能存储。但是，要想获得广泛的市场渗透率，还需要进一步提高性能和成本。为了通过最小化极化来改善电池性能，尝试使用由薄的致密电解质层和多孔支撑层组成的双工结构来减小电解质厚度。在本文中，研究了烧结条件，致密的电解质厚度和电池取向对使用气相法制备的双相BASE挠曲强度的影响。结果表明，在1500和1550℃之间的温度下烧结会产生细晶粒的微观结构，并在转化后具有最高的抗弯强度。致密电解质厚度的增加对弯曲强度的影响很小，而使致密电解质处于拉伸状态而不是压缩状态的载荷方向对具有良好烧结的致密电解质的样品的强度产生重大影响。

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  • 来源
    《Materials Science and Engineering》 |2015年第7期|43-50|共8页
  • 作者

    Nathan L. Canfield; Jin Y. Kim; Jeff F. Bonnett; R.L. Pearson Ⅲ; Vincent L. Sprenkle; Keeyoung Jung;

  • 作者单位

    Energy Processes & Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA;

    Energy Processes & Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA;

    Energy Processes & Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA;

    Energy Processes & Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA;

    Energy Processes & Materials Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA;

    Energy Storage Materials Research Center, Research Institute of Industrial Science and Technology (RIST), Pohang, Republic of Korea;

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  • 正文语种 eng
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  • 关键词

    Na beta batteries; Duplex BASEs; Sintering conditions; Flexural strength;

    机译：钠电池双工基础烧结条件;抗弯强度;

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