The science of ceramic interfaces is multidisciplinary, overlapping several existing, well-established disciplines such as solid-state chemistry, high-temperature chemistry, solid-state electrochemistry, surface science, catalysis and metallurgy. This volume contains the processing’s of the 4th international workshop on ceramic Interfaces held at the Korea Advanced Institute of Science and Technology, Taejon, Korea. 27 specialists from 8 countries contributed of the workshop which was divided into 3 sessions: Microstructural development; Transport; Interfacial Phenomena and Kinetics.