for the Lead-Free Piezoelectric Ceramics Li0.06(K0.48Na0.52)0.94(Nb0.86Ta0.08Sb0.06)O3 C. M. Cheng*, M. C. Kuan, K. H. Chen, and C. F. Yang 1 Department of Electronic Engineering, Southern Taiwan University, Tainan, Taiwan 2 Department of Electronics Engineering and Computer Science, Tung-Fang Institute of Technology, Kaohsiung, Taiwan 3 Department of Chemical and Materials Engineering, Nationa...

Highly piezoelectric and pyroelectric phases of boron-nitrogen-based polymers have been designed from first principles. They offer excellent electrical and structural properties, with up to 100% improvement in the piezoelectic response and an enhanced thermal stability with respect to polyvinylidene fluoride (PVDF). Since methods for their synthesis are readily available, these polymers are ext...

This work demonstrates the potential of porous BaTiO3 for piezoelectric sensor and energy-harvesting applications by manufacture of materials, detailed characterisation and application of new models. Ferroelectric macro-porous BaTiO3 ceramics for piezoelectric applications are manufactured for a range of relative densities, α = 0.30-0.95, using the burned out polymer spheres method. The piezoel...

The various types of defects causing failure in a variety of ceramic materials are illustrated. Examples are drawn from such ceramics as piezoelectric, infrared transmitting, and potential turbine materials. Both machining and processing defects are shown as sources of failure. The former are selected to illustrate the effects of machining parameters. Processing defects illustrated include pore...

Piezoelectric materials have coupled mechanical and electrical energies long been used in devices for actuators, sensors, energy harvesters, frequency filters, various additional applications. Piezoelectricity requires a non-centrosymmetric crystal structure is therefore confined to that possess periodic crystalline structure. Due the non-crystalline nature of glass, piezoelectricity fundamenta...