High spatial resolution structure of (K,Na)NbO 3 lead-free ferroelectric domains
In this paper, we highlight some practical aspects in the study of ferroelectric domains in lead-free (K,Na)NbO <inf>3</inf> piezoceramics. This work presents and discusses the spatial resolved structure of the ferroelectric domain existing in (K,Na)NbO <inf>3</inf> based cer...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/419542 |
| Acceso en línea: | http://hdl.handle.net/10261/419542 https://api.elsevier.com/content/abstract/scopus_id/84860365189 |
| Access Level: | acceso abierto |
| Sumario: | In this paper, we highlight some practical aspects in the study of ferroelectric domains in lead-free (K,Na)NbO <inf>3</inf> piezoceramics. This work presents and discusses the spatial resolved structure of the ferroelectric domain existing in (K,Na)NbO <inf>3</inf> based ceramics studied by confocal Raman microscopy (CRM) coupled with atomic force microscopy. In addition to the domain identification, CRM allows a determination of the nature of domain walls and correlation between the structure and piezoelectric properties. The tetragonal constraint for orthorhombic domain formations is demonstrated by this technique. Alternating polarization differences in 180° domain templates are resolved by 60° and 120° domains. The internal stress results in the appearance of an unusual polarization relaxation at the 90° domain wall in (K,Na)NbO <inf>3</inf> ceramics. Finally, the implications of the present findings introduce a fruitful discussion in the search for effective structures to improve the piezoelectric response and represent the key point to design new domains that allow engineering the piezoelectric response. © 2012 The Royal Society of Chemistry. |
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