▎ 摘　　要

NOVELTY - Raw material powder comprises carbide mixed powders comprising titanium carbide, tantalum carbide, niobium carbide, vanadium carbide, tungsten carbide and molybdenum carbide, the raw material powder also includes nano-graphene powder, the weight percentage of the carbide mixed powder in the raw material powder is 99.0-99.8%, and the weight percentage of the nano graphite powder is 0.2-1%. USE - The raw material powder is used for preparing ceramic structures (claimed). ADVANTAGE - The raw material powder has excellent hardness and wear resistance, and obviously reduces the use of tungsten carbide, so compared with the traditional WC-hard alloy, it has better application prospect, not limited to application as water knife sand pipe. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for preparing ceramic structure comprising obtaining the raw material powder, ball milling raw material powder, pressing and sintering to obtain a ceramic structure; and water knife sand pipe prepared and ceramic structure prepared by above method.