Zobrazeno 1 - 10
of 49
pro vyhledávání: '"V. F. Freitas"'
Autor:
V. F. Freitas, I. A. Santos
Publikováno v:
Cerâmica, Vol 54, Iss 331, Pp 338-344 (2008)
Os compostos cerâmicos BiFeO3 puro e modificado (Bi0,95R0,05FeO3), com terras raras R = Gd ou Eu, foram sintetizados por moagem em altas energias. As amostras foram analisadas por difração de raios X, microscopia eletrônica de varredura e espectr
Externí odkaz:
https://doaj.org/article/3d5a14d4b0a94d2f96124fa56aa065ef
Autor:
V. F. Freitas, G. S. Dias, J. M. Rosso, T. G. M. Bonadio, R. Y. Miyahara, T. T. Tominaga, L. F. Cótica, I. A. Santos
Publikováno v:
Cerâmica, Vol 62, Iss 362, Pp 115-120
Resumo Neste trabalho uma rota alternativa de síntese, o método de Pechini modificado, foi utilizada para obter nanopartículas do composto BiFeO3-PbTiO3 (BFPT). As imagens obtidas por microscopia eletrônica de varredura revelaram tamanhos de part
Externí odkaz:
https://doaj.org/article/007ea9da146b493b9c6d6256f5dba7a2
Publikováno v:
Cerâmica, Vol 62, Iss 364, Pp 323-327
Resumo Nos últimos anos as soluções sólidas multiferróicas magnetoelétricas BiFeO3-PbTiO3 têm despertado a atenção de teóricos e experimentalistas devido às suas potencialidades para aplicações práticas. Neste trabalho, amostras cerâmi
Externí odkaz:
https://doaj.org/article/d597ef3caafa42c29ffaf2e509b5249e
Autor:
L. M. Silva, J. M. Rosso, T. G. M. Bonadio, D. M. Silva, G. S. Dias, W. R. Weinand, T. T. Tominaga, R. Y. Miyahara, L. F. Cótica, I. A. Santos, V. F. Freitas
Publikováno v:
Cerâmica, Vol 64, Iss 371, Pp 359-366
Abstract A ceramic/polymer biocomposite with high potential for multifunctional practical applications in bone tissue engineering was synthesized by using a well-known piezoelectric polymer, polyvinylidene fluoride (PVDF), and a high bioactive biphas
Externí odkaz:
https://doaj.org/article/6406dc83a21b44af9f6a3fac947d0293
Autor:
V. A. de Oliveira, Marcia Lima, V. F. Freitas, P. P. González-Borrero, C. Stimer, G. B. Souza, Lúcia Cavassana Dias
Publikováno v:
Brazilian Journal of Physics. 51:1428-1437
Ferroelectric and multiferroic magnetoelectric materials Pb(ZrxTi1-x)O3, BiFeO3–PbTiO3, BiFeO3 PbTiO3, and PbZrO3 with perovskite structure were synthetized, and their optical and structural properties were investigated aiming photovoltaic applicat
Autor:
D. M. Silva, E. A. C. Astrath, V. F. Freitas, Jurandir H. Rohling, T. G. M. Bonadio, L. C. Dias, José Antonio Eiras, G. S. Dias, Ivair A. Santos, G. B. Souza, Luiz Fernando Cótica, M. Mazur
Publikováno v:
Brazilian Journal of Physics. 51:1215-1223
In this manuscript the multifunctional multiferroic 0.6BiFeO3-0.4PbTiO3 (BFPT) thin films are presented as an interesting alternative for multifunctional photovoltaic applications. The compound is chemically and structurally stable at high temperatur
Autor:
Luzmarina Hernandes, Ivair A. Santos, W. R. Weinand, T. G. M. Bonadio, V. F. Freitas, E.R. Fiorentin, A.G. Candido, H.J. Kiyochi, J. M. Rosso, Mauro Luciano Baesso, J.A. Burato, R. Y. Miyahara
Publikováno v:
Ceramics International. 46:12837-12845
The aim of this work was to evaluate the effects of sintering temperature over the structural, physical and mechanical properties in addition to the in vivo biological performance of nanostructured biocomposites obtained from the mixture between calc
Autor:
E.R. Fiorentin, Guerra Dias, V. F. Freitas, Eduardo A. Volnistem, L.E.J. Silva, Luiz Fernando Cótica, Ivair A. Santos, M.A. de Oliveira, D.H. Witchemichen, T. G. M. Bonadio
Publikováno v:
Journal of the mechanical behavior of biomedical materials. 125
Polyvinylidene fluoride – hydroxyapatite composite filaments were processed by twin-screw extrusion at different processing angular velocities and characterized by scanning electron and atomic force microscopies, differential scanning calorimetry a
Autor:
V. F. Freitas, D. M. Silva, T. G. M. Bonadio, Luiz Fernando Cótica, J. M. Rosso, José Augusto Burato, Ivair A. Santos, G. S. Dias, Eduardo A. Volnistem
Publikováno v:
Ferroelectrics. 545:70-79
In this paper, studies on the preparation and properties of barium sodium titanate niobate and poly(vinylidenefluoride) (PVDF) bulk composites are reported. SEM images show ceramic particles incorp...
Autor:
Raquel Dosciatti Bini, G. S. Dias, Ivair A. Santos, Eduardo A. Volnistem, E. A. C. Astrath, V. F. Freitas, T. G. M. Bonadio, D. M. Silva, Luiz Fernando Cótica, R. C. Oliveira, L. S. Junior
Publikováno v:
Ferroelectrics. 545:119-126