This proceedings issue contains a collection of 11 papers presented during the 33rd International Conference on Advanced Ceramics and Composites, January, 2009. Papers in this proceedings were presented from one of the three symposia listed below: Symposium 6 - Key Materials and Technologies for Efficient Direct Thermal-to-Electrical Conversion; Symposium 11 - Symposium on Advanced Dielectrics, Piezoelectric, Ferroelectric, and Multiferroic Materials; Focused Session 2 - Materials for Solid State Lighting.