▎ 摘　　要

NOVELTY - Silicon carbide/pyrocarbon (PyC) nano-wire reinforced aluminum oxide high-temperature-resistant wave-absorbing ceramic comprises aluminum oxide porous ceramic substrate, graphene interface and silicon carbide nanowires, where the aluminum dioxide porous ceramic substrate is an open continuous structure, the volume density is 3.2-4 g/cm3, the average pore diameter is 5-20 microns, and the porosity is 90-95%. The preparation of graphene interface is as follows: carrying out vacuum chemical vapor deposition on the surface of the aluminum oxide ceramic substrate framework, where the reaction source gas is trichloromethyl silane, hydrogen and argon gas, depositing the silicon carbides nanowire in the porous ceramic substrate of aluminum oxide to form lapping structure with a diameter of 20-50 nm, uniformly coating on the silicon carbide nanowire surface, and forming core-shell structure, where the reaction source gas is propylene and argon gas. USE - The silicon carbide/pyrocarbon nanowire reinforced aluminum oxide high-temperature-resistant wave-absorbing ceramic is useful for long time service in high temperature complex environment. ADVANTAGE - The wave-absorbing ceramic has light weight, high strength, high-temperature resistant and wave absorbing performance, is stably served under high temperature environment, has high chemical purity and good repeatability of preparation process, provides large-scale production of three-dimensional structure composite wave absorbing material, and has good impedance matching and attenuation coefficient. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing silicon carbide/pyrocarbon nanowire reinforced aluminum oxide high-temperature-resistant wave-absorbing ceramic.