This book highlights the history of electroceramics starting from synthesis using different routes of the solid solution to hybrid nanocomposites and its applications in different renewable energy, thermistor, actuators, thermoelectric, thermo-optic, sensor, and much more applications in electronic industry. In ceramic materials, the properties are controlled by doping and composition, but the grain size and the porosity of the sintered ceramics also play essential roles. The latter features depend on the method of fabrication. The end-user requirements define the optimum physical and chemical properties of ceramic materials. Therefore, the design and fabrication of ceramic components are multidisciplinary, spanning physical chemistry, metallurgy, and chemical engineering. Also included in this book are the various characterizing techniques to study the physical properties of ceramics.