Compositional Design of Dielectric, Ferroelectric and Piezoelectric Properties of (K, Na)NbO3 and (Ba, Na)(Ti, Nb)O-3 Based Ceramics Prepared by Different Sintering Routes

Página do item simplificado
dc.citation.issue3
dc.citation.volume9
dc.contributor.authorEiras, Jose A.
dc.contributor.authorGerbasi, Rosimeire B. Z.
dc.contributor.authorRosso, Jaciele M.
dc.contributor.authorSilva, Daniel M.
dc.contributor.authorCotica, Luiz F.
dc.contributor.authorSantos, Ivair A.
dc.contributor.authorSouza, Camila A. [UNIFESP]
dc.contributor.authorLente, Manuel H. [UNIFESP]
dc.coverageBasel
dc.date.accessioned2020-08-21T17:00:02Z
dc.date.available2020-08-21T17:00:02Z
dc.date.issued2016
dc.description.abstractLead free piezoelectric materials are being intensively investigated in order to substitute lead based ones, commonly used in many different applications. Among the most promising lead-free materials are those with modified NaNbO3, such as (K, Na)NbO3 (KNN) and (Ba, Na)(Ti, Nb)O-3 (BTNN) families. From a ceramic processing point of view, high density single phase KNN and BTNN ceramics are very difficult to sinter due to the volatility of the alkaline elements, the narrow sintering temperature range and the anomalous grain growth. In this work, Spark Plasma Sintering (SPS) and high-energy ball milling (HEBM), following heat treatments (calcining and sintering), in oxidative (O-2) atmosphere have been used to prepare single phase highly densified KNN (pure and Cu2+ or Li1+ doped), with theoretical densities (th) > 97% and BTNN ceramics ((th) similar to 90%), respectively. Using BTTN ceramics with a P4mm perovskite-like structure, we showed that by increasing the NaNbO3 content, the ferroelectric properties change from having a relaxor effect to an almost normal ferroelectric character, while the tetragonality and grain size increase and the shear piezoelectric coefficients (k(15), g(15) and d(15)) improve. For KNN ceramics, the results reveal that the values for remanent polarization as well as for most of the coercive field are quite similar among all compositions. These facts evidenced that Cu2+ may be incorporated into the A and/or B sites of the perovskite structure, having both hardening and softening effects.en
dc.description.affiliationUniv Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Maringa, Dept Phys, Av Colombo 5790, BR-87020900 Maringa, Parana, Brazil
dc.description.affiliationUniv Fed Sao Paulo, Inst Sci & Technol, 330 Talim St Vila Nair, BR-12231280 Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, Inst Sci & Technol, 330 Talim St Vila Nair, BR-12231280 Sao Jose Dos Campos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipCNPq
dc.description.sponsorshipFapesp
dc.description.sponsorshipCapes
dc.description.sponsorshipIDCNPq: 446565/2014-8
dc.description.sponsorshipIDCapes: Procad 88881.068509/2014-01
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.3390/ma9030179
dc.identifier.citationMaterials. Basel, v. 9, n. 3, p. -, 2016.
dc.identifier.doi10.3390/ma9030179
dc.identifier.fileWOS000373805400003.pdf
dc.identifier.issn1996-1944
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/57847
dc.identifier.wosWOS:000373805400003
dc.language.isoeng
dc.publisherMdpi Ag
dc.relation.ispartofMaterials
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectlead-free piezoelectricsen
dc.subjectferroelectricsen
dc.subjectpiezoelectricsen
dc.subjectspark plasma sinteringen
dc.titleCompositional Design of Dielectric, Ferroelectric and Piezoelectric Properties of (K, Na)NbO3 and (Ba, Na)(Ti, Nb)O-3 Based Ceramics Prepared by Different Sintering Routesen
dc.typeinfo:eu-repo/semantics/article
Arquivos
Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
WOS000373805400003.pdf
Tamanho:
3.59 MB
Formato:
Adobe Portable Document Format
Descrição:
Baixar
Coleções
ICT - Artigos