This volume contains a collection of 19 papers from the 11th International Symposium on Ceramic Materials and Components for Energy and Environmental Applications (CMCEE-11), June 14-19, 2015 in Vancouver, BC, Canada. Papers were presented in the below five symposia from Track 2 on the topic of Ceramics for Energy Conservation and Efficiency:

• Advanced Ceramics and Composites for Gas Turbine Engines
• Advanced Refractory Ceramic Materials and Technologies
• Advanced Ceramic Coatings for Power Systems
• Energy Efficient Advanced Bearings and Wear Resistant Materials
• Advanced Nitrides and Related Materials for Energy Applications