Conventional electroceramic materials are typically sintered at high temperatures above 1 000 ℃. However

such high-temperature sintering conditions often result in performance degradation of functional ceramics and restrict their compositing with other materials

such as polymers and metals. As an emerging low-temperature sintering technique

the cold sintering process (CSP) allows ceramic densification at temperatures below 300 ℃

significantly reducing energy consumption and carbon emissions during manufacturing. This method provides a novel strategy for the development and performance optimization of advanced electroceramics. This paper mainly summarizes recent advances in cold sintering of zinc oxide (ZnO) based electroceramics and their composites. First

the densification mechanism of ZnO ceramics with CSP is discussed. Then

the low-temperature sintering processes for various electroceramic composites

including ZnO varistors

ZnO-polymer

ZnO based two-dimensional material composites

and ZnO-metal are analyzed. These materials exhibit excellent electrical

optical

and mechanical properties

along with unique features such as superhydrophobicity

grain anisotropy

and switch-like behavior. The results indicate that CSP exhibits promising application in ZnO-based electroceramics and their composites

while also providing valuable insights into the design and performance enhancement of other advanced electroceramic materials.