A process for the preparation of a cathode block for an aluminum electrolysis cell and a cathode block

The invention relates to a method for producing a cathode block, comprising the steps of a) providing a mixture of starting materials comprising coke and pitch, the coke includes two cokes that have a different volume change behavior during the carbonization and / or graphitization and / or cooling, b) molding the mixture into a green body and c) carbonizing the green body and graphitizing the carbonized green body without impregnate before, to obtain a graphitized body, and cooling after the graphitization.