Liquid metal coolant is a type of cooling fluid that uses liquid metals, such as sodium or gallium, to transfer heat away from high-temperature systems. These coolants have excellent thermal conductivity, allowing them to efficiently absorb and dissipate heat, making them suitable for applications like nuclear reactors and advanced thermal management systems. Unlike traditional coolants like water or oil, liquid metal coolants can operate at much higher temperatures without boiling. This property enables them to enhance the performance and safety of various technologies, including spacecraft and high-performance computing systems, where effective heat removal is crucial.