Lecture

Ceramic Powders: Electrostatic Repulsion and Steric Stabilization

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In course

MSE-214: Materials engineering I

An introduction to the processing-microstructure-property relationships of polymers and metals. The objectives of the course are to understand a) basic behaviors of polymers and metals and b) how to select materials for components relevant in microtechnolo ...

Description

This lecture delves into the electrostatic repulsive forces in ceramic powders, discussing the origins of these forces, the concept of the double layer, and the formation of an ionic cloud around particles. It also explores the role of steric stabilization induced by the adsorption of molecules on particle surfaces, the effect of different parameters on total interaction energy, and the rheology of ceramic suspensions. The presentation covers the evolution of viscosity as a function of pH, the impact of zeta potential on rheological properties, and the reasons for granulating powders, using dry pressing as an example.

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Instructors (3)

Pierre-Etienne Bourban

Background 1990 Ingénieur en science des matériaux 1993 PhD in materials science Activities 1993-1994 Research at the Center for Composite Materials, University of Delaware, USA (ccm.udel.edu), SNSF grant Since 1994 Research and teaching at EPFL, Composites, (LTC, LPAC) 1995-1999 Coordination Swiss Priority Program on Materials research: 2.2: Composites Since 1998 Biocomposites 2004-2009 Direction of the EPFL Transdisciplinary programme in Sport and Rehabilitation 2005-2008 Member of the EPFL Vice-Presidency for Innovation and Valorisation and direction a.i.EPFL-LTC Since 2016 Direction Discovery Learning Labs Materials/Bioengineering and Engineering

Harm-Anton Klok

Expertise Polymer design at nanoscaleBiologically-inspired polymers Mission Research at the Laboratory of Polymer (LP) focuses on the development of novel advanced polymeric materials with potential applications in optics, electronics or medicine. The philosophy is that precise control over nanoscale structure is an important prerequisite to tailor polymer properties. To this end, a “bottom-up” approach is followed, which starts with designing a new material at the molecular level, in order to be able to pr

Michael Stuer

Mission Study effects of dopants and structural defects on the microstructure development and the optical properties of transparent ceramics. Teaching & PhD PhD Students Katerina Urbancová, Annalena Erlacher Courses Advanced ceramic technologies MSE-495 Advanced ceramic processing concepts and technologies will be presented. Students will learn concepts on advanced technologically-relevant ceramic materials for a wide range of applications from MedTech, energy conversion & storage, with in

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