Special Issue "Piezoelectric Materials"
Deadline for manuscript submissions: closed (30 September 2015)
Prof. Dr. Lorena Pardo
Department of Materials for the Information Technologies. Institute of Materials Science of Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC). c/Sor Juana Inés de la Cruz, 3. Cantoblanco. 28049-Madrid, Spain
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Interests: ferroelectric materials; piezoelectricity; dielectric properties; pyroelectric properties; mechanical properties; ceramics; ferroelectric domains; phase transitions; structure determination; microstructure and texture determination; composite materials; lead-free piezoceramics; photovoltaics; energy harvesting; energy storage; electromechanical resonances; ultrasonic generation
Piezoelectric materials constitutes a well-established, yet dynamic, field of research activities with numerous practical applications, such as sensors and actuators, covering almost all human activities (communications, transport, health, energy, manufacture and quality control to name a few). The piezoelectricity (conversion of mechanical into electrical energy and vice versa) was discovered by Pierre and Jacques Curie in 1880. It characterizes non-centrosymmetric materials, such as quartz, hidroxyapatite of the bones, or drawn silk films. Ferroelectrics are a special class of piezoelectrics, being multifunctional crystals whose structure possesses a spontaneous dipole which can switch between two equilibrium states. The piezoelectricity of barium titanium oxide (BaTiO3) ceramics, i.e., randomly oriented ionic policrystals, therefore isotropic and centrosymmetric materials, remained unexplained until 1944. At this time, the role of “poling” by an applied electric field, which causes ferroelectric dipole orientation, was understood. From that date, scientific areas concerning ferro-piezoelectric materials such as ceramics, composites, single-crystals and thin films have grown steadily wider. An increasing effort has been devoted to obtain high sensitivity and lead-free composition materials since 2003. This was driven by the toxicity of lead oxide, the main component of commercial Pb(Zr,Ti)O3 (PZT) ceramics, and by current directives for environmental protection, demanding the elimination of lead from the piezoelectric components in devices. This remains a primary scientific challenge. Mechanical strains generated by the piezoelectric effect in ferroelectric oxides are relatively low and must be amplified for practical purposes. Field-induced structural phase transitions are among those mechanisms that can generate a massive mechanical strain, one order of magnitude higher than the piezoelectric one in ferroelectric oxides with a perovskite-type structure. Such a mechanism has recently led to a new generation of non-linear actuators. Advances in characterization techniques, ultra-high electromechanical response, energy harvesting using piezoelectrics, flexoelectricty or piezoelectronics are other examples of recent topics of interest within this field.
Manuscript Submission Information
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- Processing of piezoelectric materials (ceramics, composites, single-crystals, etc.)
- Lead-free piezoelectric materials
- Structure-properties relationships in piezoelectric materials
- Morphotropic and polymorphic phase boundaries in ferro-piezoelectric perovskites
- Poling of ferro-piezoelectrics and electric field-induced transitions
- Determination of piezoelectric, dielectric and elastic material coefficients from impedance at electromechanical resonance
- Non-linear properties and characterization of piezoelectric materials