This study reports the successful single‐step cold sintering of nanocrystalline cerium dioxide (CeO₂) at temperatures ranging from 250°C to 400°C under 500 MPa, using molten hydroxides flux solvents. CeO₂ ceramics obtained were 82 to 91% of the theoretical density. Structural and microstructural investigations of the as‐cold sintered CeO₂ ceramics were conducted to further understand this new approach to cold sinter ceramics. Electrical conductivity measured by two‐point AC impedance demonstrated an activation energy for grain conductivity of 0.49 eV, with impedance spectra characteristic of nanoscale CeO₂.

中文翻译：

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冷烧结法一步法致密化纳米晶CeO2

这项研究报告了使用熔融的氢氧化物助熔剂在250°C至400°C的温度和500 MPa的压力下成功完成了纳米二氧化铈（CeO ₂）的单步冷烧结。获得的CeO ₂陶瓷为理论密度的82％至91％。对冷烧结的CeO ₂陶瓷进行了结构和微观结构研究，以进一步了解这种冷烧结陶瓷的新方法。通过两点交流阻抗测量的电导率显示出0.49 eV的晶粒电导活化能，其阻抗谱具有纳米级CeO _2的特征。