The dual role of electric field in the flash sintering process of conducting MnCo₂O₄ is demonstrated. The flash and conventionally sintered MnCo₂O₄ samples produced at different temperatures are characterized using energy dispersive X-ray and micro-Raman spectroscopy to elucidate the micro-level spatial distribution of evolved phases. Raman signal mapping over the two ways sintered samples exposes differently grown areas of cobalt oxide based secondary phase. Electrical conductivity of conventionally sintered sample is recorded as a function of temperature and E-field and is utilized to discover the charge carrier activation mechanism during the flash effect. The conductivity before the flash-onset is shown to be comparable to that occurs by Poole-Frenkel effect and Phonon-assisted tunneling i.e. by the mechanism that occurs before the dielectric breakdown of semiconductors and insulators. The observed results, finally, confirm that catalyst like drift action of E-field on cobalt oxide formation is responsible for enhancement in the flash-sintering.

证明了电场在传导MnCo ₂ O ₄的快速烧结过程中的双重作用。闪蒸和常规烧结的MnCo ₂ O ₄使用能量色散X射线和显微拉曼光谱对在不同温度下产生的样品进行表征，以阐明演化相的微观水平空间分布。两种方式的烧结样品上的拉曼信号映射图显示了氧化钴基次生相的不同生长区域。记录常规烧结样品的电导率随温度和电场的变化，并用于在闪光效应期间发现电荷载流子激活机理。闪络开始之前的电导率显示出与Poole-Frenkel效应和声子辅助隧穿所产生的电导率相当，即通过半导体和绝缘体介电击穿之前发生的机理所产生的电导率可比。最后，观察到的结果