Transição de Fase Difusa e Propriedades Dielétricas de Cerâmicas Ferroelétricas de (Pb, Ba)Nb2O6
<abstract language="eng">Tungsten bonze structured lead barium niobate (Pb1-xBa xNb2O6) ferroelectric ceramics were prepared by the conventional mixed oxide method and their dielectric properties were carefully investigated. All studied samples presented elevated values of maximum di...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2002-03-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000100003 |
| _version_ | 1819101727544049664 |
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| author | I.A. Santos V.L. Arantes D. Garcia J.A. Eiras |
| author_facet | I.A. Santos V.L. Arantes D. Garcia J.A. Eiras |
| author_sort | I.A. Santos |
| collection | DOAJ |
| description | <abstract language="eng">Tungsten bonze structured lead barium niobate (Pb1-xBa xNb2O6) ferroelectric ceramics were prepared by the conventional mixed oxide method and their dielectric properties were carefully investigated. All studied samples presented elevated values of maximum dielectric constant (epsilon'm) and its corresponding temperature of maximum (Tm) in comparison with perovskite structured ones. The phase transition features indicate that the PBN samples do not present a complete diffuse phase transition. Indeed, the diffuseness degree of the ferroelectric phase transition is highly dependent of the ions Pb2+ content in the sample compositions. The diffuseness of the ferroelectric phase transition is enhanced while the temperature of maximum dielectric constant is decreased with the Pb2+ content decreasing. In addition, the maximum dielectric constant shows an opposite behavior. |
| first_indexed | 2024-12-22T01:23:16Z |
| format | Article |
| id | doaj.art-0a35305290024769b37c0e39451c99e3 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-22T01:23:16Z |
| publishDate | 2002-03-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-0a35305290024769b37c0e39451c99e32022-12-21T18:43:40ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392002-03-0151131910.1590/S1516-14392002000100003Transição de Fase Difusa e Propriedades Dielétricas de Cerâmicas Ferroelétricas de (Pb, Ba)Nb2O6I.A. SantosV.L. ArantesD. GarciaJ.A. Eiras<abstract language="eng">Tungsten bonze structured lead barium niobate (Pb1-xBa xNb2O6) ferroelectric ceramics were prepared by the conventional mixed oxide method and their dielectric properties were carefully investigated. All studied samples presented elevated values of maximum dielectric constant (epsilon'm) and its corresponding temperature of maximum (Tm) in comparison with perovskite structured ones. The phase transition features indicate that the PBN samples do not present a complete diffuse phase transition. Indeed, the diffuseness degree of the ferroelectric phase transition is highly dependent of the ions Pb2+ content in the sample compositions. The diffuseness of the ferroelectric phase transition is enhanced while the temperature of maximum dielectric constant is decreased with the Pb2+ content decreasing. In addition, the maximum dielectric constant shows an opposite behavior.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000100003diffuse phase transitionelectroceramicsniobates |
| spellingShingle | I.A. Santos V.L. Arantes D. Garcia J.A. Eiras Transição de Fase Difusa e Propriedades Dielétricas de Cerâmicas Ferroelétricas de (Pb, Ba)Nb2O6 Materials Research diffuse phase transition electroceramics niobates |
| title | Transição de Fase Difusa e Propriedades Dielétricas de Cerâmicas Ferroelétricas de (Pb, Ba)Nb2O6 |
| title_full | Transição de Fase Difusa e Propriedades Dielétricas de Cerâmicas Ferroelétricas de (Pb, Ba)Nb2O6 |
| title_fullStr | Transição de Fase Difusa e Propriedades Dielétricas de Cerâmicas Ferroelétricas de (Pb, Ba)Nb2O6 |
| title_full_unstemmed | Transição de Fase Difusa e Propriedades Dielétricas de Cerâmicas Ferroelétricas de (Pb, Ba)Nb2O6 |
| title_short | Transição de Fase Difusa e Propriedades Dielétricas de Cerâmicas Ferroelétricas de (Pb, Ba)Nb2O6 |
| title_sort | transicao de fase difusa e propriedades dieletricas de ceramicas ferroeletricas de pb ba nb2o6 |
| topic | diffuse phase transition electroceramics niobates |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392002000100003 |
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