C3N4

C3N4 (carbon nitride) is a hard ceramic compound composed of carbon and nitrogen atoms, belonging to the family of lightweight high-strength ceramics. While primarily investigated in research and development rather than widespread industrial production, it is of growing interest for applications demanding exceptional hardness, thermal stability, and chemical resistance—particularly in scenarios where traditional ceramics or diamond alternatives are cost-prohibitive or functionally limiting. Its layered crystal structure and potential for exfoliation make it especially promising for next-generation composite reinforcement, tribological coatings, and semiconductor applications where both mechanical performance and functional properties are critical.