Polymorphic phase boundary in piezoelectric oxides
The design of phase boundaries has now become a consolidated strategy to improve the functional properties of piezoelectric oxides because of the unique properties that may be obtained in their vicinity. In particular, polymorphic phase boundaries (PPBs) have attracted significant interest in recent...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/183124 |
| Acceso en línea: | https://hdl.handle.net/2117/183124 https://dx.doi.org/10.1063/5.0002983 |
| Access Level: | acceso abierto |
| Palabra clave: | Oxides Ceramics X-rays - Diffraction Polymorphism (Crystallography) Perovskite Phase transformations (Statistical physics) Polycrystals Piezoelectric materials X-ray diffraction Ferroelectric materials Polymorphism Perovskites Phase transitions Polycrystalline material Òxids Ceràmica industrial Raigs X -- Difracció Polimorfisme (Cristal·lografia) Perovskita Transicions de fase (Física estadística) Policristal·lins Àrees temàtiques de la UPC::Física |
| Sumario: | The design of phase boundaries has now become a consolidated strategy to improve the functional properties of piezoelectric oxides because of the unique properties that may be obtained in their vicinity. In particular, polymorphic phase boundaries (PPBs) have attracted significant interest in recent years because they represent a significant breakthrough in terms of enhanced piezoelectric activity of lead-free piezoelectric oxides. PPBs are temperature-driven phase transitions where both intrinsic and extrinsic contributions maximize, thereby enhancing the macroscopic properties of piezoelectric materials. This tutorial discusses potassium–sodium–niobate-based systems as model materials to reveal some of the most relevant advances in the design of PPBs through compositional modifications. We focus on how PPBs can be modulated by engineered doping and also discuss the direct relation between PPBs and the enhancement of piezoelectric activity. Finally, we briefly describe the main experimental techniques for detecting PPBs. |
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