Intrinsic Equilibrium Constants of beta;‐Silicon Carbide Obtained from Surface Charge Data

The surface charge behavior of β‐SiC in KNO 3 electrolyte solutions is reported as a function of pH and ionic strength. The surface charge densities were obtained by potentiometric titration, and the point of zero charge of β‐SiC was determined by the batch equilibration method. The intrinsic equilibrium constants, describing association‐dissociation of surface groups, were calculated using the site‐binding model.