J
J. E. V. de Morais
Researcher at Federal University of Ceará
Publications - 20
Citations - 107
J. E. V. de Morais is an academic researcher from Federal University of Ceará. The author has contributed to research in topics: Dielectric & Ceramic. The author has an hindex of 6, co-authored 20 publications receiving 80 citations.
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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
Dielectrical and structural studies of composite matrix BiVO4–CaTiO3 and temperature effects by impedance spectroscopy
R. G. M. Oliveira,D. B. Freitas,G. S. Batista,J. E. V. de Morais,V. C. Martins,M. M. Costa,Marcelo Antônio Santos Da Silva,D. X. Gouvêa,Charanjeet Singh,Antonio Sergio Bezerra Sombra,Antonio Sergio Bezerra Sombra +10 more
TL;DR: In this paper, the effects of adding CaTiO3 (CTO) and changing the temperature on the dielectric and electric properties of the BVO matrix in the radio frequency range were analyzed.
Journal ArticleDOI
Dielectric characterization of BiVO4 -TiO2 composites and applications in microwave range
R. G. M. Oliveira,J. E. V. de Morais,G. S. Batista,Marcelo Antônio Santos Da Silva,J.C. Góes,Antonio Sergio Bezerra Sombra,Antonio Sergio Bezerra Sombra +6 more
TL;DR: In this article, the authors reported the dielectric and structural characterization of composites formed by mixture of BiVO4 and TiO2 and applications in microwave range, and the composites were formulated by addition of TiO 2 (15, 30, 45 and 60 wt %) in biVO4.
Journal ArticleDOI
Dielectric Study in the Microwave Range for Ceramic Composites Based on Sr2CoNbO6 and TiO2 Mixtures
J. E. V. de Morais,R.G.M. de Oliveira,A. J. N. de Castro,J. C. Sales,Marcelo Antônio Santos Da Silva,J.C. Góes,M. M. Costa,Antonio Sergio Bezerra Sombra +7 more
TL;DR: In this article, the authors fabricated ceramic composites based on the composite matrix Sr2CoNbO6 (SCNO)-TiO2 and measured the dielectric properties in the microwave range by using the Hakki-Coleman method, as well as the thermal stability of these composites in this frequency range.
Journal ArticleDOI
A study of the dielectric and electrical properties of the matrix composite [Ba2CoNbO6 (BCNO)1-X - CaTiO3(CTO)X]
A. J. N. de Castro,V. L. Bessa,J. E. V. de Morais,Loyanne Caroline Peixoto Silva,R. G. M. Oliveira,J. P. C. do Nascimento,J. C. Sales,Marcelo Antônio Santos Da Silva,J.C. Góes,D. X. Gouveia,Antonio Sergio Bezerra Sombra,Antonio Sergio Bezerra Sombra +11 more
TL;DR: In this paper, composites based on the ceramic matrix Ba2CoNbO6 (BCNO)1-X - CaTiO3(CTO)X were fabricated using the solid-state reaction method.