Boron carbide nozzle and preparation method thereof

The invention discloses a boron carbide nozzle and a preparation method thereof, and belongs to the technical field of nozzle forming. The raw materials adopted by the invention comprise the following components in parts by weight: 100 parts of boron carbide with the particle size of 0.5-1.0 mu m, 5-10 parts of a first sintering aid, 5-10 parts of a second sintering aid, 0.5-1 part of a first dispersing agent and 0.5-1 part of a second dispersing agent, the preparation method comprises the following steps: carrying out compression molding on mixed granules obtained by spray granulation to manufacture a hollow green body, carrying out pressureless sintering, presintering and shaping, and carrying out hot-pressing sintering molding by adopting a sintering mold. The process route is simple, the process flow time is short, the qualified rate of the prepared product can reach 99% or above, the density reaches 99% or above, the density is larger than or equal to 2.48 g/cm < 3 >, the Vickers hardness is larger than