Zobrazeno 1 - 10
of 59
pro vyhledávání: '"ARAÚJO,JOSÉ HUMBERTO"'
Autor:
de Brito, Alex Soares, Valerio-Cuadros, Marlon Ivan, Huaman, Noemi Raquel Checca, de Melo, Maurício Antônio Custódio, Barco, Reginaldo, Ivashita, Flávio Francisco, de Araújo, José Humberto, Torres, Marco Antonio Morales, Paesano, Andrea, Jr.
Publikováno v:
In Journal of Alloys and Compounds Communications September 2024 3
Autor:
de Brito, Alex Soares, Oliveira, Aline A., Valerio-Cuadros, Marlon Ivan, Tupan, Lilian Felipe S., Gualdi, Alexandre José, Barco, Reginaldo, Ivashita, Flávio F., de Araújo, José Humberto, Torres, Marco Antonio M., Paesano, Andrea, Jr.
Publikováno v:
In Journal of Alloys and Compounds 30 June 2024 990
Akademický článek
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Akademický článek
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Publikováno v:
Materials Research, Vol 7, Iss 2, Pp 359-361 (2004)
The effect of heat treatment on illite in air at temperatures ranging from 750 to 1150 °C was studied using the Mössbauer effect in 57Fe. The dependence of the Mössbauer parameters and relative percentage of the radiation absorption area was measu
Externí odkaz:
https://doaj.org/article/224c2180ec004107b3316228dae058d5
Autor:
Araújo, José Humberto de, Pimentel, Patrícia Mendonça, Dutra, J. L. S., Lima, A. C., Bagnato, Osmar Roberto, Costa, Asenete Frutuoso, Oliveira, Rosane Maria Pessoa Betanio
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
The rare-earth orthoferrites (LnFeO3) are promising materials for various applications, such as chemical sensors, cathode for SOFC, catalysts, among others. In general, these oxides are synthesized at temperatures higher than 700 °C. In this work, n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::cd78a0c9db8fe8081371df5abf3c6d0c
https://repositorio.ufrn.br/jspui/handle/123456789/29401
https://repositorio.ufrn.br/jspui/handle/123456789/29401
Akademický článek
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K zobrazení výsledku je třeba se přihlásit.
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Autor:
Araújo, José Humberto de, Soares, João Maria, Galdino, V.B., Conceição, Ozivam Lopes de Aquino, Torres, Marco Antonio Morales, Machado, Fernando L. A.
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Core/shell nanoparticles of CoFe2O4=CoFe2 were prepared by reducing nanoparticles of CoFe2O4 under hydrogen atmospheres. The structure, morphology and room temperature magnetization of the core/ shell nanoparticles were analyzed by X-ray diffraction,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::01475063a39267c51f2115d4225ce556
https://repositorio.ufrn.br/jspui/handle/123456789/29364
https://repositorio.ufrn.br/jspui/handle/123456789/29364
Autor:
Araújo, José Humberto de, Pimentel, Patrícia Mendonça, Oliveira, Rosane Maria Pessoa Betânio, Oliveira, Filipe Silva, Bagnato, Osmar Roberto, Melo, Dulce Maria de Araújo
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
The main purpose of this work was to obtain Sm-Sr nickelates nanoparticles with Ruddelsden-Popper type structuresobtained by a simple process such as gelatin synthesis. The powders were calcinated at 900 ºC and characterized by X-ray diffraction,the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::a478d7bcdf0349533b67993edeb2034c
https://repositorio.ufrn.br/jspui/handle/123456789/29359
https://repositorio.ufrn.br/jspui/handle/123456789/29359
Autor:
Araújo, José Humberto de, Soares, J. M., Cabral, F. A. O., Machado, F. L. A., Ginani, Marconi Floripe
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
High purity BaFe12O19 samples were synthesized by an ionic-coordination-reaction (ICR) technique using chitosan as a complex agent. The mean size Dm of the particles and their magnetic properties were controlled by varying the concentration of chitos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::4034dd7ef711923438484fb2a6349d40
https://repositorio.ufrn.br/jspui/handle/123456789/29191
https://repositorio.ufrn.br/jspui/handle/123456789/29191