Process and slip for the production of ceramic shaped bodies made of zirconium oxide by 3d inkjet printing

A process for the production of a ceramic shaped part by an inkjet printing process, comprising

• (i) shaping a slip in layers into a geometric shape of the desired ceramic shaped part, wherein the individual layers are each dried after printing to produce a green compact,
• (ii) optionally drying the green compact,
• (iii) applying a staining solution to the green body, and
• (iv) sintering the green compact,
• wherein the layered construction of the green compact in step (i) is effected by a layered inkjet printing process,
• wherein the slip comprises zirconium oxide with a particle size of from 50 to 250 nm, measured as the d50 value and relative to the volume of the particles, suspended in a liquid medium, and has a zirconium oxide content of from 68 to 88 wt.-%, and not more than 3 wt.-% organic components, relative to the total mass of the slip,
• wherein the slip has a viscosity of 5 to 100 mPas, measured at a shear rate of from 0.1 to 1000 s-1 and at a temperature of 25° C., and
• wherein the printed ceramic shaped part is sintered directly after printing and optionally subsequent drying without a separate debinding step.