Zobrazeno 1 - 10 of 29 pro vyhledávání: '"L. F. CóTica"'
1
Akademický článek
Espectroscopia Mössbauer e refinamento estrutural no sistema cerâmico isomórfico (alfa-Fe2O3)-(alfa-Al2O 3) Mössbauer spectroscopy and structural refinement in the isomorphic (alpha-Fe2O3)-( alpha-Al2O3) ceramic system
Autor: J. A. Moreto, R. M. Szmoski, L. F. Cótica, A. Paesano Jr, I. A. Santos, J. B. M. da Cunha
Publikováno v: Cerâmica, Vol 53, Iss 326, Pp 175-179 (2007)
Os multiferróicos são materiais em que duas ou três propriedades tais como ferroeletricidade, ferromagnetismo e ferroelasticidade são observadas em uma mesma fase. Em particular, os multiferróicos magnetoelétricos representam os materiais que s
Externí odkaz: https://doaj.org/article/3bb31c3a662a4ee8b99090dad1ea6c4b
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2
Akademický článek
Processamento e caracterizações estruturais, microestruturais e ferroelétricas do composto magnetoelétrico BiFeO3-PbTiO3 obtido pelo método de Pechini
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
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3
Akademický článek
Avaliação do módulo elástico de cerâmicas magnetoelétricas de 0,6BiFeO3-0,4PbTiO3 dopadas com La
Autor: C. I. Berveglieri, V. F. Freitas, L. F. Cótica, I. A. Santos
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
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4
Akademický článek
On mechanical properties and bioactivity of PVDF-BCP composites
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
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6
Synthesis and characterization of structural, microstructural and ferroic properties of CoFe2O4nanoparticles and CoFe2O4:BaTiO3core-shell nanocomposites
Autor: Raquel Dosciatti Bini, Amar S. Bhalla, G. S. Dias, D. M. Silva, L. F. Cótica, D. Alanis, Ruyan Guo, P.N. Oliveira, I. A. Santos
Publikováno v: Integrated Ferroelectrics. 174:88-97
Cobalt ferrite magnetic nanoparticles (CFO) and CoFe2O4:BaTiO3 (CFO:BTO) nanocomposites were synthesized successfully by a polymeric method and by a combination of polymeric and citrate-gel methods, respectively. Nanoparticles with a uniform shape, g
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f22b6985bcbc17378c4fb22eaf977d1d
https://doi.org/10.1080/10584587.2016.1192907
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7
Thermal effects in magnetoelectric properties of NiFe2O4/Pb(Zr0.52Ti0.48)O3/NiFe2O4tri-layered composite
Autor: Amar S. Bhalla, Shashank Priya, Ruyan Guo, L. F. Cótica, C. T. Morrow, Soutik Betal
Publikováno v: Integrated Ferroelectrics. 174:203-209
Layered composite electro-ceramics can be designed to exhibit the magnetoelectric (ME) effect based on stress transfer from magnetostriction of ferromagnetic layer to the ferroelectric layer. Many studies in search of giant ME coefficients in layered
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a11c1036d1841bfcfd99e88df4198c43
https://doi.org/10.1080/10584587.2016.1196555
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8
Voltage gain and efficiency of a bi-layered radial mode piezoelectric/magnetoelectric solid-state transformer
Autor: Ivair A. Santos, José Antonio Eiras, D. Garcia, Amar S. Bhalla, V. F. Freitas, D. M. Silva, D. Z. Montanher, Ruyan Guo, F. J. Gaiotto, L. F. Cótica, J. R. D. Pereira
Publikováno v: Integrated Ferroelectrics. 174:210-216
Piezoelectric transformers are devices able to raise an electrical input voltage with low energy losses. However, there are a few reports on the designing of multiferroic piezoelectric transformers. In this paper, an alternative bi-layer radial mode
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6ab81865b339566ba9477f4ca937798a
https://doi.org/10.1080/10584587.2016.1196560
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9
Synthesis and physical property measurements of CoFe2O4:BaTiO3core-shell composite nanoparticles
Autor: L. F. Cótica, I. A. Santos, P.N. Oliveira, D. M. Silva, G. S. Dias
Publikováno v: Ferroelectrics. 499:76-82
Multiferroic nanocomposites were prepared in a core-shell configuration, in which CoFe2O4 (Cobalt ferrite) is the core and BaTiO3 (Barium Titanate) the shell. The nanocomposites were synthesized by a combination of polymeric and citrate-gel methods.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb24ed9a1aab83d16c990d992ac85f96
https://doi.org/10.1080/00150193.2016.1172882
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