Recent Research Progress of Cold Sintering Process and Its Potential Application in Electrotechnical Fields
Kang Shenglin1, Zhao Xuetong1, Zhang Jiexin1, Guo Jing2, Yang Lijun1
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China; 2. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
Abstract：A high sintering temperature of more than 1 000℃ is typically needed for the densification of ceramic materials, which can bring about a great challenge on the phase stability, grain boundary control and co-sintering of ceramic matrix composites. Recently, an extremely low sintering technique named cold sintering process (CSP) was proposed, which refers to a pressure-assisted transient liquid phase sintering process to effect densification by a mediated dissolution-precipitation process at ≤300℃. CSP shows a significant advantage in the sintering of ceramics due to the low-temperature and time-saving characteristics. In this work, the research progress of CSP was reviewed based on the sintering mechanism and its applications in electrotechnical fields. Firstly, the densification process and preparation technology of the CSP ceramics were introduced. Then, the categories of the transient liquid phases, and their roles in the CSP were analyzed. Moreover, the applications of CSP in new electric materials such as ceramic-polymer composites (varistors, pyroelectricity, electrolyte), ceramic-2D materials (pyroelectricity), high-gradient ZnO varistors and ceramic-metal multilayer structures (capacitor) were presented. Finally, the combination of CSP with other sintering techniques were discussed. CSP provides a scientific reference for the study of sintering mechanism at extreme low temperatures, and a new route for the development of novel functional ceramics and ceramic-based composites applied in electrotechnical fields.
康晟淋, 赵学童, 张洁心, 郭靖, 杨丽君. 冷烧结技术的研究进展及其在电工领域的潜在应用[J]. 电工技术学报, 2022, 37(5): 1098-1114.
Kang Shenglin, Zhao Xuetong, Zhang Jiexin, Guo Jing, Yang Lijun. Recent Research Progress of Cold Sintering Process and Its Potential Application in Electrotechnical Fields. Transactions of China Electrotechnical Society, 2022, 37(5): 1098-1114.
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