Method for preparing pressureless sintered silicon carbide ceramic through high-strength low-deformation gel injection molding

The invention relates to a method for preparing pressureless sintered silicon carbide ceramic through high-strength and low-deformation gel injection molding, which comprises the following steps: S1, mixing a monomer, a cross-linking agent, deionized water, a dispersing agent, a suspending agent and a defoaming agent, and fully stirring to obtain a premixed solution; s2, sequentially adding ceramic powder into the premixed liquid according to the sequence of boron carbide, carbon black and modified silicon carbide powder, and stirring to obtain slurry; s3, performing ball milling treatment on the slurry, performing defoaming treatment after ball milling, and performing vibration treatment during defoaming to obtain defoamed slurry; and S4, adding a catalyst and an initiator into the defoamed slurry, stirring, pouring into a mold, molding to obtain a green body, drying the green body according to a drying system to obtain a dried green body, and carrying out pressureless sintering on the dried green body to ob