I
I. S. Queiroz Júnior
Publications - 11
Citations - 49
I. S. Queiroz Júnior is an academic researcher. The author has contributed to research in topics: Dielectric & Dielectric spectroscopy. The author has an hindex of 3, co-authored 11 publications receiving 28 citations.
Papers
More filters
Journal ArticleDOI
Effects of CaTiO3 addition on the microwave dielectric properties and antenna properties of BiVO4 ceramics
R. G. M. Oliveira,R.A. Silva,J. E. V. de Morais,G. S. Batista,Marcelo Antônio Santos Da Silva,J.C. Góes,H. D. de Andrade,I. S. Queiroz Júnior,Charanjeet Singh,Antonio Sergio Bezerra Sombra +9 more
TL;DR: In this article, the authors investigated the microwave dielectric properties through the Hakki-Coleman method of BiVO4 ceramic matrix, obtained by the solid-state reaction method, using 8, 16, 24 and 32% of CaTiO3.
Journal ArticleDOI
Comparison of spatial interpolation methods to determine exposure ratio to electric fields in urban environments
TL;DR: In this article, the authors evaluate which method of interpolation, among the studied techniques, has the best performance to estimate accurately the intensity values of electric fields by analysing the parameters mean absolute error and RMS error.
Journal ArticleDOI
High thermal stability and colossal permittivity of novel solid solution LaFeO3/CaTiO3
S. J. T. Vasconcelos,Marcelo Antônio Santos Da Silva,R.G.M. de Oliveira,M. H. Bezerra Junior,H. D. de Andrade,I. S. Queiroz Júnior,Charanjeet Singh,Antonio Sergio Bezerra Sombra +7 more
TL;DR: In this article, the authors presented the novel (LaFeO3)(1-m)(CaTiO3)m (m = 0, 0.1 and 0.5 in weight fraction) solid solutions.
Journal ArticleDOI
Dielectric characterisation and numerical investigation of SrBi2Nb2O9–Bi2O3 composites for applications in microwave range
R. F. Abreu,S. O. Saturno,J. P. C. do Nascimento,E. O. Sancho,J. E. V. de Morais,J. C. Sales,D. X. Gouveia,H. D. de Andrade,I. S. Queiroz Júnior,Antonio Sergio Bezerra Sombra +9 more
TL;DR: In this article, the dielectric properties and behavior of DAs based on SrBi2Nb2O9 (SBN)-Bi2O3 composites were studied.
Journal ArticleDOI
Design and characterization study of LaFeO3 and CaTiO3 composites at microwave frequencies and their applications as dielectric resonator antennas
L.O. Azevedo,S. J. T. Vasconcelos,Humberto Dionísio de Andrade,I. S. Queiroz Júnior,Romualdo S. Silva,Antonio Sergio Bezerra Sombra +5 more
TL;DR: In this article, the properties of composites of lanthanum ortoferrite LFO and calcium titanate CTO (CaTiO3) as cylindrical dielectric resonator antennas are presented for the first time.