Ceramics-Silikáty 37, (1) 10 - 13 (1993)

The effect of the pressure gradient on the transfer of liquid through the ceramic mix during the pouring of the slip into a ceramic mould was studied. A method, based on suction of the liquid through a layer of porous material, where the suspension at the frit is subject to the effect of a pressure difference, was devised for determining the barodiffusion pressure. The barodiffusion coefficient was found to be independent of pressure, and its value for barodiffusion of water in a suspension of α-Al₂O₃ was established as being 3 x 10⁻¹³ m² s⁻¹ Pa⁻¹.