REVIEW OF PROGRAMMABLE THERMAL CONTROL METAMATERIALS

Most materials in nature have positive coefficients of thermal expansion, expanding as temperature increases. Excessive thermal expansion can compromise the thermal stability of structures and adversely affect the functionality and safety of precision components. Metamaterials rely on ingeniously designed microstructures to achieve exotic properties that can not exist in natural materials, providing a good platform for realizing negative thermal expansion, near-zero thermal expansion and programmable thermal expansion. This paper reviews the recent advancements in programmable thermal control metamaterials from these three perspectives, and provides an outlook on their application prospects and future research directions. This review serves as a reference for applications in variable temperature environments, such as observation satellites, phased array antennas, and fuel cells.