Abstract Recent investigations have shown that highly oxygen defective cerium oxides generate non-classical electrostriction that is superior to lead-based ferroelectrics. In this work, we report the effect of field-assisted spark plasma sintering (SPS) on electro-chemo-mechanical properties of calcium doped ceria (CDC). Nanometric powders of Ca.10 nm are rapidly consolidated to form polycrystalline nanostructures with a high degree of crystalline disorder. Remarkably, the resultant material demonstrates a large electromechanical strain without a frequency-related relaxation effect. We conclude that electromechanical activity in CDC materials strictly depends on the Ca2+- V o ¨ interaction, while disorder at the crystalline boundaries has a minor effect.

中文翻译：

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通过场辅助烧结在纳米结构的 Ca 掺杂氧化铈 (CDC) 中的电化学机械性能

摘要 最近的研究表明，高度缺氧的氧化铈产生的非经典电致伸缩优于铅基铁电体。在这项工作中，我们报告了场辅助放电等离子体烧结 (SPS) 对掺钙氧化铈 (CDC) 电化学机械性能的影响。Ca.10 nm 的纳米粉末迅速固结，形成具有高度结晶无序的多晶纳米结构。值得注意的是，所得材料表现出大的机电应变，而没有与频率相关的弛豫效应。我们得出结论，CDC 材料中的机电活性严格取决于 Ca2+-Vo¨ 相互作用，而晶体边界处的无序影响较小。