Solid solutions of BiFeO 3 and BaTiO are promising lead-free piezoelectric materials, especially around the morphotropic phase boundary at 0.67BiFeO -0.33BaTiO . Still, these materials challenged by instability limited understanding processing-properties relationship. Here, we investigate mechanochemical activation use as seed particles for phase. Contrary to expectations from seeding in lead-b...

The ferroelectric and strain behavior of the Ba(Ti12yCey)O3 solid solutions was studied. Three phase transition temperatures were shifted with increasing Ce concentration, and pinched at y 50.06. The samples could be structurally indexed by x-ray diffraction in a tetragonal symmetry at y<0.06; and in a pseudo-cubic symmetry at y.0.06. The strain levels in the range of 0.15–0.19% at ;60 kV/cm wi...

Both flexoelectricity and piezoelectricity belong to the electromechanical coupling effect. While only exists in materials whose crystal structure is noncentrosymmetric a pre-polarization process necessary for ferroelectric piezoelectric ceramics, theoretically all dielectric does not require pre-polarization. However, this mean that would be affected by process, considering polarization phenom...

Comparative studies of the temperature dependences and dispersion complex permittivity sodium niobate sodium-lithium ceramics have been carried out. It is shown that structural transition to R-phase (370 o C) a ferroelectric phase transition. For ceramics, existence three fundamentally different mechanisms relaxation processes has established: classical (Debye type), linear, relaxation, which d...

Lead zirconate titanate (PZT) as a piezoelectric ceramic has been used widely in the fields of electronics, biomedical engineering, mechatronics and thermoelectric. Although, the electrical properties of PZT ceramics is a major considerable, but the mechanical properties such as fracture strength and toughness should be improved for many applications. In this study, lead monoxide, zirconium ...

Most of those techniques used for the measurement of elastic coefficients for bulk piezoelectric ceramics are not applicable to films deposited on thick substrates because the measured properties, such as the resonant frequency, are usually dominated by the presence of the thick substrate. This work presents a preliminary study for the application of Alemany et al. automatic iterative method fo...

Research at the Materials Research Laboratory, Pennsylvania State University has demonstrated the potential for improving hydrophone performance using piezoelectric ceramic/polymer composites. As part of an ONR-funded initiative to develop cost-effective manufacturing technology for these composites, Materials Systems is pursuing an injection molding ceramic fabrication approach. This paper bri...

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