THE INVESTIGATION OF THE PROPERTIES MULTI-ELEMENT DOPED GRAPHITES CONTAINING Zr

Multi element doped graphites were prepared by hot pressing techniques using natural graphite powders as the precursor. The effect of dopants on the properties of doped graphites was studied. It was shown that the properties of doped graphites varied with increasing Zr additive content up to 8?%. However, excessive ZrO 2 addition leads to a reaction with carbon and gives rise to Zr vapor, which resulted in the degradation of materials' properties due to the formation of defects during Zr evaporation. Therefore ZrO 2 additions must be carefully controlled. In addition, the microstructure of doped graphites was examined by SEM and XRD. Correlation between microstructure and properties of such doped graphites are discussed.