Výsledky vyhledávání - "R S T M Sohn"

Understanding the Radiation Thermometers

Autor: R S T M Sohn

Publikováno v: Journal of Physics: Conference Series. 1826:012031

Radiation thermometers use the laws of thermal radiation to compute the temperature as a function of the measured spectral radiance. The more precise calculations involve the integration of Planck’s Law, which turns the mathematical developments mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6fd6c2448fa56c2244786257ec780b9e
https://doi.org/10.1088/1742-6596/1826/1/012031

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Study of the temperature and organic bindings effects in the dielectric and structural properties of the lithium ferrite ceramic matrix (LiFe5O8)

Autor: Antonio Sergio Bezerra Sombra, Selma Elaine Mazzetto, R. S. T. M. Sohn, Marcos Mota do Carmo Costa, Ana Angélica Mathias Macêdo, M.P.F. Graça

Publikováno v: Journal of Alloys and Compounds. 509:9466-9471

In this study, the effects of the calcination temperature and of the organic bindings in the structural and dielectric properties of lithium ferrite (LiFe 5 O 8 ) were investigated. The organic bindings used were glycerol, PVA (polyvinyl alcohol) and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e9f463275521656e954dd75e8d03768
https://doi.org/10.1016/j.jallcom.2011.07.038

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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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Structural properties of CaTi1−x(Nb2/3Li2/3)xO3−δ (CNLTO) and CaTi1−x(Nb1/2Ln1/2)xO3 (Ln=Fe (CNFTO), Bi (CNBTO)), modified dielectric ceramics for microwave applications

Autor: Francisco Nivaldo Aguiar Freire, Rodrigo Carvalho Souza Costa, Juciê de Sousa Almeida, Antonio Sergio Bezerra Sombra, M Santos, José Marcos Sasaki, A. D. S. Bruno Costa, R. S. T. M. Sohn

Publikováno v: Physica B: Condensed Matter. 404:1409-1414

This paper presents an investigation of the structural characteristics of Nb 1/2 Bi 1/2 (CNBTO), Nb 1/2 Fe 1/2 (CNFTO) and Nb 2/3 Li 1/3 (CNLTO) substitution into the B-site of calcium titanate ceramics. The modified CaTiO 3 (CTO) ceramics were prepa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::487d1d0057e65ba40128ad0176664342
https://doi.org/10.1016/j.physb.2008.12.037

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Bandwidth enhancement of stacked dielectric resonator antennas excited by a coaxial probe: an experimental and numerical investigation

Autor: H.H.B. Rocha, M.G. da Silva, Francisco Nivaldo Aguiar Freire, Cynthia Junqueira, M Santos, R. S. T. M. Sohn, Antonio Sergio Bezerra Sombra, T. Cordaro

Publikováno v: IET Microwaves, Antennas & Propagation. 2:580-587

An experimental and numerical investigation about bandwidth enhancement of dielectric resonator antennas (DRAs) using multiple DRAs, arranged according to a ‘stacked’ configuration is reported. The antenna consists of two cylindrical discs of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db3c4e55e6596a6a218eb196f0d3c55c
https://doi.org/10.1049/iet-map:20070292

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Magnetic and dielectric properties of the M-type barium strontium hexaferrite (Ba x Sr1−x Fe12O19) in the RF and microwave (MW) frequency range

Autor: R. S. T. M. Sohn, Juciê de Sousa Almeida, F. M. M. Pereira, A. M. L. Medeiros, M Santos, Marcos Mota do Carmo Costa, Antonio Sergio Bezerra Sombra

Publikováno v: Journal of Materials Science: Materials in Electronics. 20:408-417

This paper presents results for the dielectric permittivity (e′), dielectric loss (tg δE) dielectric permeability (μ′) and magnetic loss (tg δM) in the radio-frequency and microwave frequency range of BaxSr1−xFe12O19 hexaferrite (0 ≤ x ≤

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f844ec3dd649e7addd0c97f5507795c
https://doi.org/10.1007/s10854-008-9744-8

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Studies of the temperature coefficient of capacitance (TCC) of a new electroceramic composite: Pb(Fe0.5Nb0.5)O3 (PFN)–Cr0.75Fe1.25O3(CRFO)

Autor: E. O. Sancho, A. M. L. Medeiros, Antonio Sergio Bezerra Sombra, F. M. M. Pereira, Marcos Mota do Carmo Costa, J.S. Almeida, R. S. T. M. Sohn, M Santos, Francisco Nivaldo Aguiar Freire

Publikováno v: Journal of Materials Science: Materials in Electronics. 20:149-156

In this paper we did a study of the dielectric properties: capacitance (C), dielectric permittivity(e), electric modulus(M) and dielectric loss(tangα)) in the radio-frequency(RF) and microwave (MW) frequency range as a function of temperature and th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e079b4abfe1489ec6d95b7fef2dbf364
https://doi.org/10.1007/s10854-008-9673-6

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Experimental and numerical investigation of a ceramic dielectric resonator (DRA): CaCu3Ti4O12 (CCTO)

Autor: M.A. Valente, R.R. Silva, R. S. T. M. Sohn, Pierre Basílio Almeida Fechine, H.H.B. Rocha, Antonio Sergio Bezerra Sombra, F.S.A. Cavalcanti, Francisco Nivaldo Aguiar Freire, Ana Fabíola Leite Almeida

Publikováno v: Physica B: Condensed Matter. 403:586-594

In this study, the CaCu3Ti4O12 (CCTO) ceramic phase was synthesized by microwave heating in a much shorter time compared to the conventional heating methods. The results indicate that microwave processing is a promising method for preparing CCTO cera

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d07800c448fd55010522fe23d5aa25c
https://doi.org/10.1016/j.physb.2007.08.222

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Structural studies of a new electroceramic composite: Pb(Fe0.5Nb0.5)O3 (PFN)-Cr0.75Fe1.25O3(CRFO)

Autor: Francisco Nivaldo Aguiar Freire, Igor F. Vasconcelos, Pierre Basílio Almeida Fechine, M. R. P. Santos, R. S. T. M. Sohn, F. M. M. Pereira, H.H.B. Rocha, Antonio Sergio Bezerra Sombra

Publikováno v: Journal of Materials Science. 43:75-82

A study of the structural characteristics of the composites [Pb(Fe0.5Nb0.5)O3(PFN)]x-[Cr0.75Fe1.25O3(CRFO)]100−x (x = 0 (CRFO100), 10, 50, 90, 100) was performed in this work. The compounds PFN100 and CRFO100 were prepared by conventional solid-sta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cca785fde71f72d661c5a4f6534db5b7
https://doi.org/10.1007/s10853-007-2091-y

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