Výsledky vyhledávání - "H. O. Rodrigues"

Experimental and numerical investigation of the microwave dielectric properties of the MgTiO3 ceramic matrix added with CaCu3Ti4O12

Autor: Paulo W.S. Oliveira, Antonio Sergio Bezerra Sombra, G.F.M. Pires Junior, H. O. Rodrigues, A. J. M. Sales

Publikováno v: Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 16, Iss 2, Pp 403-418

This paper describes an experimental and numerical investigation of the dielectric resonators based on the MgTiO 3 ceramic matrix, which relates to their dielectric properties in microwave. The resonators are compounds of the MgTiO 3 added with 4, 6,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::780856cb9a91a848046c52784f2061ce
https://doi.org/10.1590/2179-10742017v16i2794

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Power dependent upconversion in Er3+/Yb3+ co-doped BiNbO4 phosphors

Autor: M.J. Soares, D. G. Sousa, J. Suresh Kumar, Marcos Mota do Carmo Costa, Francisco Nivaldo Aguiar Freire, M.P.F. Graça, Antonio Sergio Bezerra Sombra, H. O. Rodrigues, A. J. M. Sales

Publikováno v: Ceramics International. 42:6899-6905

In the present article, optical properties and energy upconversion in Er 3+ /Yb 3+ co-doped BiNbO 4 matrix were investigated. The BiNbO 4 matrix was prepared using the solid-state reaction method. X-ray diffraction of the matrix shows that the crysta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e15840bb78046c30b116cc4253505baa
https://doi.org/10.1016/j.ceramint.2016.01.075

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Experimental and numerical investigation of dielectric resonator antenna based on the BiFeO3 ceramic matrix added with Bi2O3 or PbO

Autor: A. J. M. Sales, Antonio Sergio Bezerra Sombra, J.S. Almeida, H. O. Rodrigues, Marcelo Antônio Santos Da Silva, G.F.M. Pires Junior

Publikováno v: Journal of Alloys and Compounds. 576:324-331

In this paper is reported an experimental and numerical investigation of the microwave dielectric properties of BiFeO 3 (BFO) ceramic matrix added with 3 and 10 wt% of Bi 2 O 3 or PbO, obtained through a new procedure based on the solid-state method.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9fe92248b4e159fdf3068cc836bdca3b
https://doi.org/10.1016/j.jallcom.2013.06.009

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High dielectric permittivity of SrBi2Nb2O9(SBN) added Bi2O3 and La2O3

Autor: P. M. O. Silva, H. O. Rodrigues, D. B. Freitas, E. O. Sancho, G.F.M. Pires Junior, Antonio Sergio Bezerra Sombra

Publikováno v: Journal of Electroceramics. 30:119-128

In this paper, the structural and dielectric properties of SrBi2Nb2O9 (SBN) as a function of Bi2O3 or La2O3 addition level in the radio (RF) and microwave frequencies were investigated. The SBN, were prepared by using a new procedure in the solid-sta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::76334f0ab462d5513eee5e5cab332274
https://doi.org/10.1007/s10832-012-9772-x

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Copper concentration effect in the dielectric properties of BiNbO4 for RF applications

Autor: P.W.S. Oliveira, H. O. Rodrigues, A. J. M. Sales, Antonio Sergio Bezerra Sombra, Marcos Mota do Carmo Costa, J.S. Almeida

Publikováno v: Journal of Alloys and Compounds. 542:264-270

In this paper, the structural and dielectric properties BiNbO4 as a function of cooper addition level and the radio frequency was investigated. The BiNbO4 ceramics, were prepared by using the solid-state reaction method with the addition of 3, 5, and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67a99548472114e8cfaf6b4f1afd55d6
https://doi.org/10.1016/j.jallcom.2012.07.025

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BiFeO3 ceramic matrix with Bi2O3 or PbO added: Mössbauer, Raman and dielectric spectroscopy studies

Autor: Antonio Sergio Bezerra Sombra, P. Alcantara, H. O. Rodrigues, Benilde F.O. Costa, A. J. M. Sales, P. M. O. Silva, G.F.M. Pires Junior, Sanclayton G. C. Moreira

Publikováno v: Physica B: Condensed Matter. 406(13):2532-2539

In this paper Mossbauer, Raman and dielectric spectroscopy studies of BiFeO 3 (BFO) ceramic matrix with 3 or 10 wt% of Bi 2 O 3 or PbO added, obtained through a new procedure based on the solid-state method, are presented. Mossbauer spectroscopy show

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90f244c6bf44ab16389f77491035029c

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Study of the structural and dielectric properties of Bi2O3 and PbO addition on BiNbO4 ceramic matrix for RF applications

Autor: A. J. M. Sales, T. S. M. Fernandes, J.S. Almeida, Marcelo Antônio Santos Da Silva, H. O. Rodrigues, Antonio Sergio Bezerra Sombra, G. F. M. P. Júnior

Publikováno v: Journal of Materials Science: Materials in Electronics. 22:978-987

In this paper, the structural and dielectric properties of BNO (BiNbO4) was investigated as a function of the external RF frequency and temperature. The BNO Ceramics, prepared by the conventional mixed oxide method and doped with 3, 5 and 10 wt. % Bi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c99458c7c483a04d07b377220dd678b0
https://doi.org/10.1007/s10854-010-0247-z

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Experimental and numerical investigation of a magnetic resonator antenna based on the M-type hexaferrite (Bax Sr1−x Fe12 O19 )

Autor: Marcelo Antônio Santos Da Silva, Antonio Sergio Bezerra Sombra, G. F. M. P. Júnior, R. S. T. M. Sohn, M. J. S. Rocha, H. O. Rodrigues, F. M. M. Pereira, Klara Theophilo

Publikováno v: Microwave and Optical Technology Letters. 52:452-458

In this work is reported an experimental and numerical investigation of magnetic resonator antennas (MRA) of magnetic the alloy BaxSr1−xFe12O19 obtained in a new procedure in the solid-state method. The experimental and theoretical characteristics

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6597157f0123961e9a73caf0c49e1bdd
https://doi.org/10.1002/mop.24931

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ChemInform Abstract: Copper Concentration Effect in the Dielectric Properties of BiNbO4for RF Applications

Autor: A. J. M. Sales, Antonio Sergio Bezerra Sombra, P.W.S. Oliveira, Marcos Mota do Carmo Costa, J.S. Almeida, H. O. Rodrigues

Publikováno v: ChemInform. 43

BiNbO4 ceramics for possible applications in radio frequency devices like ceramic capacitors are prepared by solid state reaction with the addition of 3, 5, and 10 wt.% of CuO (sintering at 925 °C for 3 h).

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ff7d51f7afb844de263d5623adc9810
https://doi.org/10.1002/chin.201251013

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