The electrokinetic behaviour of compact ceramic surfaces is mainly characterised by streaming-potential measurement using flow parallel to the surface. For these measurements the electrokinetic analyser (EKA) is commercially available. Often this method shows experimental difficulties. In view of filtration-membranes characterisation the process determining effect derives not only from the surface. The open porosity of the membrane as a whole also influences the interaction with charged species to be filtrated. A new method was developed closely related to real filtration: A flow-through potential measurement. Suspensions are nowadays characterised using an electroacoustic method. To link the electrokinetic results measured on suspensions to measurements on compact surfaces a new electroacoustic-surface-potential measurement was tested. It is obvious that the electrokinetic behaviour of compact ceramic cannot be derived from suspension measurement. The properties of the electrically chargeable MOH groups on the surface is changed during thermal treatment. 德國PA在線高濃度粒度分析儀 德國PA高濃度粒度分析儀 德國PA高濃度Zeta電位分析儀