This invention belongs to the field of cable technology, specifically a thin-walled
oxygen-barrier high-temperature resistant cable, comprising a conductor core and a thin-walled outer sheath. The conductor core has a high-temperature resistant
insulation layer made of polyetheretherketone (PEEK)
composite material on its outer side. Between the high-temperature resistant
insulation layer and the thin-walled outer sheath, from the inside out, are sequentially arranged a ceramicized
oxygen barrier layer and a
flame-retardant reinforcement layer. The ceramicized
oxygen barrier layer is a nano-modified ceramicized
silicone rubber layer with a thickness of 0.05–0.15 mm, including an outer layer doped with
silicon carbide whiskers and an inner layer doped with
zinc borate. This invention prepares an ultra-thin ceramicized layer through gradient
doping, resolving the contradiction between thin-walled design and
oxygen barrier properties, and effectively improving the interfacial peel strength. This reduces the cable's outer
diameter and bending
radius, making the cable lightweight and suitable for high-dynamic applications.