Dissolvent hot liquid state phase-change method for synthesizing superhard micro nano material

The invention discloses a solvent hot-liquid phase transforming method to synthesize superhard micro-nanometer material in the chemical and new material domain, which comprises the following steps: dispersing hexagonal boron nitride, graphite mold carbon nitride or graphite powder solid particle in the liquid dielectric organic solvent, proceeding ultrasonic dispersing disposal for suspension liquid, adding fitful addictive to reduce phase-transforming needed temperature and pressure, changing boundary energy condition between solid particle and liquid dielectric, accelerating the solid particle to change to needed material.