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