Use of a ceramic powder based on rare earth oxide-stabilized zirconium (di)oxide as an adhesion impr

The invention relates to the use of a ceramic powder based on zirconium (di)oxide, the ceramic powder containing a tetragonal and/or cubic zirconium (di)oxide which is at least partially stabilised by rare earth metal oxide, in a thermoplastic or thermosetting polymer moulded body (1, 2) and/or an adhesive layer (3). The zirconium (di)oxide stabilised by rare earth metal oxide is used as a bonding enhancer for the bonding of adhesives to the polymer moulded body.