December 8, 2010
FRONTIERS IN MATERIALS SCIENCE
VINSE COLLOQUIUM SERIES
Dr. Partha Sarkar
Senior Scientist; Carbon and Energy Management
Alberta Innovates - Technology Futures (AITF)
"Fundamentals and Advanced Applications of Electrophoretic Deposition (EPD)”Abstract. The facileness of the electrophoretic deposition (EPD) technique together with it’s potential for a wide range of novel applications in the processing of advanced materials and coatings, has recently gained increasing interest both in academia and industrial sector. A brief history of electrophoretic deposition (EPD) will be presented and EPD process will be defined. Basic fundamental aspects of electrophoretic consolidation of fine particles from colloidal suspension will be discussed. The kinetics of the EPD process will be discussed for constant-current and constant-voltage conditions. The process of submonolayer formation of spherical mono-sized ceramic particles as a function of deposition time during EPD will be analyzed and a striking similarity between the atomic thin-film growth (10000 times smaller scale) process and EPD will be established.
This presentation will discuss unique capabilities of EPD. Illustration of numerous applications of EPD including coatings, nanoscale assembly, micropatterned thin films, near shape ceramics, etc. will be given. One of the most potential advanced applications of EPD is in manufacturing of Tubular Micro Solid Oxide Fuel Cell (mSOFC). Author’s research group in Alberta Innovates - Technology Futures (AITF) is a pioneered in tubular mSOFC development using EPD based technology. This EPD based manufacturing process is also capable of fabricating single cell as small as ~10mm in diameter. Due to its thin wall, a mSOFC has extremely high thermal shock resistance and low thermal mass. Author’s research group has tested these SOFC devices using a gas burner as a heat source and demonstrated that they can be started up in seconds, candidate for portable applications.
Bio. Dr. Sarkar received the B.E. degree from College of Ceramic Technology, Calcutta, India, M.S. degree from Indian Institute of Technology Kanpur and Ph.D. degree in Materials Science & Engineering from McMaster University, Canada. Dr. Sarkar is well known in the world's ceramics/materials scientist community for his outstanding contribution in Electrophoretic Deposition (EPD) and work in Tubular Micro Solid Oxide Fuel Cell. Dr. Sarkar was awarded a visiting scientist fellowship in 1996 by the Tokyo Metropolitan University (TMU) in Japan, to work on its International Joint Research Program. He joined the Alberta Innovates – Technology Futures (AITF) (former name: Alberta Research Council) in November 1997. He is an Adjunct Professor in Chemical & Materials Engineering in University of Alberta. He is the Theme Leader of Canadian National Project on Solid Oxide Fuel Cell (NSERC SOFCC Strategic Research Network Project: http://www.sofccanada.com). Dr. Sarkar has collaboration with Nano Ceramic Group of Japanese National Institute of Materials Science (NIMS). Dr. Sarkar has 8 issued patents, with 2 patent applications in prosecution.