石墨化热处理过程中石墨制品的微观结构分析和理化性能表征

Characterization of organization structure and physicochemical properties for Graphitization products in the process of Graphitization heat treatment

以经混捏+轧片、冷等静压成型以及焙烧等工序处理后的焙烧样品为原料,通过石墨化热处理后,考察焙烧样品经石墨化热处理前后的组织结构和理化性能.试验结果表明,经2 800℃热处理,焙烧样品的结构由杂乱无序的结构转化为有序的三维石墨结构,处理后样品的石墨化度达到62.79%.室温电阻率随石墨化度的增大而下降,随体积密度的增大而下降.同时相比石墨化处理前,抗折强度和抗压强度降低了50%以上.

The graphitization heat treatment of the calcined samples as the raw material was studied,and these samples were obtained by the process treatment of roasting kneading,shaping and baking.The organization structure and physicochemical properties of these samples before and after graphitization heat treatment were investigated.The results showed that：after the treatment of 2800 ℃,the organizational structure of samples conversion of orderly three -dimensional structure from disordered two -dimensional,and these samples have the characterization of graphite structure,and the graphitization degree reached 62.79%.Room -temperature resistivity increases with the graphitization degree decreases,along with the increase of bulk density decreased, the flexural strength and compressive strength decreased significantly,reduced by 50%.