A process for the preparation of a ceramic body, comprising the steps: a. providing a plurality of particles; b. providing a device that comprises a sintering chamber bordered by a die; c. introducing the particles into the sintering chamber; d. applying a pressure P in the range from 1 MPa to 80 MPa to the plurality of particles in the sintering chamber to obtain the ceramic body, wherein a temperature in the sintering chamber, during preparation of the ceramic body, is controlled so that the temperature at a centre of the sintering chamber is lower than the temperature at an interior surface of the die.

A process for the preparation of a ceramic body, comprising the steps: a. providing a plurality of particles; b. providing a device that comprises a sintering chamber bordered by a die; c. introducing the particles into the sintering chamber; d. applying a pressure P in the range from 1 MPa to 80 MPa to the plurality of particles in the sintering chamber to obtain the ceramic body, wherein a temperature in the sintering chamber, during preparation of the ceramic body, is controlled so that the temperature at a centre of the sintering chamber is lower than the temperature at an interior surface of the die.