A new, hydrolysis-assisted solidification (HAS) concept for net-shaping of ceramic green parts from aqueous suspensions is presented. The process is based on thermally activated hydrolysis of aluminium nitride powder added to highly loaded ceramic suspensions. During hydrolysis of AlN, water is consumed and ammonia is formed, which in turn may increase the pH of the suspension. Both mechanisms can be used to increase the viscosity and ultimately to set a cast or injection-moulded ceramic green body. Different ceramic suspensions containing various amounts of AlN powder were prepared at ambient temperature without increasing their viscosity and subsequently set in heated impermeable moulds. The setting time ranged from a few seconds to a few minutes, depending on the solids loading, AlN addition and the thickness of the green body.