Abstract Flash sintering has been shown to be an effective method of sintering for many types of ceramics. However, the characteristics of flash sintering for each type of ceramic varies. When ionically conducting ceramics are sintered under a DC electric field, a strong dependence of densification with respect to position is observed. Microstructural analysis of the effect of electric field on oxygen ion conductors shows non-stoichiometry (oxygen deficiency) at the cathode which continues to build up over time under flash. In oxygen ion conductors, dominant charge carriers during flash are oxygen ions and the final density of the specimen is related to the availability of oxygen. This effect is no longer evident when using an AC power supply. Thus, use of AC instead of DC electric field is preferable for flash sintering of ionically conducting ceramics.

中文翻译：

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快速烧结过程中氧化铈中氧迁移率和异常晶格膨胀的原位观察

摘要 闪速烧结已被证明是一种有效的烧结多种陶瓷的方法。但是，每种陶瓷的闪烧特性各不相同。当离子导电陶瓷在直流电场下烧结时，观察到致密化与位置的强烈相关性。电场对氧离子导体影响的微观结构分析显示阴极处的非化学计量（缺氧）在闪光下随着时间的推移继续累积。在氧离子导体中，闪光期间的主要电荷载流子是氧离子，样品的最终密度与氧气的可用性有关。使用交流电源时，这种影响不再明显。因此，