H
H. O. Rodrigues
Researcher at Federal University of Ceará
Publications - 10
Citations - 168
H. O. Rodrigues is an academic researcher from Federal University of Ceará. The author has contributed to research in topics: Dielectric & Dielectric loss. The author has an hindex of 6, co-authored 10 publications receiving 146 citations.
Papers
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Journal ArticleDOI
Study of the structural, dielectric and magnetic properties of Bi2O3 and PbO addition on BiFeO3 ceramic matrix
H. O. Rodrigues,G.F.M. Pires Junior,J.S. Almeida,E. O. Sancho,A. C. Ferreira,Marcelo Antônio Santos Da Silva,Antonio Sergio Bezerra Sombra +6 more
TL;DR: In this paper, the structural, dielectric and magnetic properties of fifteen BFO samples were discussed in view of possible applications in RF and microwave devices, where polyvinyl alcohol (PVA) and tetraethyl orthosilicate (TEOS) were also added as a binder in fabrication procedure.
Journal ArticleDOI
BiFeO3 ceramic matrix with Bi2O3 or PbO added: Mössbauer, Raman and dielectric spectroscopy studies
H. O. Rodrigues,G.F.M. Pires Junior,A. J. M. Sales,P. M. O. Silva,Benilde F.O. Costa,P. Alcantara,Sanclayton G. C. Moreira,Antonio Sergio Bezerra Sombra +7 more
TL;DR: In this paper, the effect of additives on the dielectric properties of a BiFeO 3 (BFO) ceramic matrix with 3 or 10% of Bi 2 O 3 or PbO added, obtained through a new procedure based on the solid-state method, is presented.
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Copper concentration effect in the dielectric properties of BiNbO4 for RF applications
A. J. M. Sales,P.W.S. Oliveira,J.S. Almeida,Marcos Mota do Carmo Costa,H. O. Rodrigues,Antonio Sergio Bezerra Sombra +5 more
TL;DR: In this article, the structural and dielectric properties of BiNbO4 as a function of cooper addition level and the radio frequency were investigated using X-ray diffraction.
Journal ArticleDOI
Power dependent upconversion in Er3+/Yb3+ co-doped BiNbO4 phosphors
A. J. M. Sales,D. G. Sousa,H. O. Rodrigues,Marcos Mota do Carmo Costa,Antonio Sergio Bezerra Sombra,Francisco Nivaldo Aguiar Freire,M.J. Soares,M.P.F. Graça,J. Suresh Kumar +8 more
TL;DR: In this paper, optical properties and energy upconversion in Er 3+ /Yb 3+ co-doped BiNbO 4 matrix were investigated using the solid-state reaction method.
Journal ArticleDOI
Study of the structural and dielectric properties of Bi 2 O 3 and PbO addition on BiNbO 4 ceramic matrix for RF applications
J.S. Almeida,T. S. M. Fernandes,A. J. M. Sales,Marcelo Antônio Santos Da Silva,G. F. M. P. Júnior,H. O. Rodrigues,Antonio Sergio Bezerra Sombra +6 more
TL;DR: In this paper, the structural and dielectric properties of BNO (BiNbO4) were investigated as a function of the external RF frequency and temperature, and it was shown that starting from the BNO one can increase the doping level of Bi or Pb and find a concentration where one has TCC ≥ 0.