This book provides a state-of-the-art collection of recent papers on interfaces in heterogeneous ceramic systems presented at the 6th Pacific Rim Conference on Ceramic and Glass Technology (PacRim 6) in September of 2005 in Maui, Hawaii. The book is logically divided into 5 sections on interfaces, including theory and modeling, wetting phenomena, heterogeneous interfaces in high-temperature superconductors, bio-interfaces, and new developments in instrumentation that aid in the characterization of interfaces.