Special Issue "Piezoelectric Crystals"
Deadline for manuscript submissions: closed (30 April 2014).
Interests: Piezoelectricity; Ferroelectricity; Crystals; Ceramics; Transducers
Special Issues and Collections in MDPI journals
Significant advances in functional materials have highlighted the role of piezoelectricity. They are able to cooperate with other functional materials, such as those dedicated for magnetism or optics, which is primarily ascribed to polarization dynamics induced by electric, thermal, and stress fields. Intense research methods were implemented on polycrystalline ceramics in order to enhance piezoelectric performance through the construction of morphotropic phase boundary (MPB) and phase convergence regions in some lead-based and lead-free systems. For instance, this was proposed based on the outstanding piezoelectricity of lead-based systems near MPB, because of the monoclinic distortion and polarization rotation. Another example is the excellent strain response obtained in some lead-free polycrystalline ceramics, which resulted from the strong coupling between relaxor and ferroelectric compounds.
Crystal growth has also been proposed to improve the ferroelectric and/or piezoelectric response. On the one hand, the absence of grain boundaries in single crystals facilitates polarization switching and enables a larger volume of the material to contribute to the electromechanical response. On the other hand, engineered domains in ferroelectric single crystals can be formed by poling along a particular crystallographic direction. Finally, further research on piezoelectric single crystals is also motivated by their increased anisotropic macroscopic electrical performance.
This Special Issue aims at covering all of the relevant aspects of lead-based and lead-free piezoelectric crystals and ceramics. Both well-established, novel, or less common compounds, and piezoelectric mechanisms in single crystals will be covered. Therefore, the Issue welcomes original research and review manuscripts on the following main aspects:
- Lead-based and lead-free single crystals and ceramics
- Morphotropic phase boundary
- Phase convergence region
- Development and design of piezoelectric single crystals and ceramics
- Domain engineering
- Role of defects
- Chemical characterization
- Electromechanical characterization
- Ab-initio, DFT, and first principles calculations on piezoelectric single crystals and ceramics
Dr. Philippe Veber