ZrB6

Zirconium hexaboride (ZrB6) is an ultra-high-temperature ceramic boride compound that combines exceptional hardness with metallic electrical conductivity, placing it at the intersection of ceramic and metal properties. It is primarily investigated for extreme thermal environments and wear-resistant applications, particularly in aerospace propulsion systems, plasma electrodes, and cutting tools where conventional refractory metals fail. ZrB6 is notable for maintaining strength and conductivity at temperatures where oxide ceramics degrade, though it remains less commercialized than competing ultra-high-temperature ceramics like ZrB2 and HfB2, making it an active area of materials research rather than a mature commodity material.