Development of an Epoxy/Carbon fiber composite for radiation attenuation with a dispersion of micro particles of bismuth trioxide (Bi2O3)
Carregando...
Data
Data de publicação
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Brazilian Journal of Radiation Sciences
Exportar
Resumo
The objective of this research was the development of an epoxy/carbon fiber
composite with bismuth trioxide (Bi2O3) dispersion in the polymeric matrix for
application as a low-energy photon barrier and to determine the mass attenuation
coefficient of this composite. Quantitative and experimental methodology was used for
this research. The mass ratios of the bismuth oxide in the composite were approximately
0.1, 0.2, 0.3 and 0.4. The Pantak/Seifert irradiator model Isovolt HS 160 was used as an
X-radiation source. The photon energies were 48, 65, 82 and 118 keV, with radiation
doses of 471, 1912, 92.6 and 74.2x10-3 mGy.min-1 respectively, with energies and
radiation doses being typical of X-ray diagnostic radiography. At an energy of 118 keV,
the dispersion of Bi2O3 in the polymeric matrix increased the mass attenuation
coefficient from 0.15 cm2.g-1 (without dispersion) to 1.28 cm2.g-1 (39.13% by mass of
Bi2O3). This is an increase of approximately 753%. At an energy of 82 keV, the
percentage increase was approximately 582%. At an energy of 65 keV, there was an
increase of 739% and for photons with an energy of 48 keV the percentage increase in
the mass attenuation coefficient was 1262%. In conclusion, a composite epoxy/carbon
fiber with bismuth oxide dispersion is an excellent option as compared to a lead plate.
The composite studied can attenuate photon energy and does not present an acute or
chronic danger to the environment or to health. Also, it is non-carcinogenic and does not
cause reproductive toxicity, both being clear advantages over lead. Finally, it should be
noted that composite applications could be radiological shields for the X-ray, aerospace
industries, among others.
Como referenciar
MUNHOZ, P.M.; NASCIMENTO, F.C.; RODRIGUES JUNIOR, O.; POTIENS, M.P.A.; CALVO, W.A.P. Development of an Epoxy/Carbon fiber composite for radiation attenuation with a dispersion of micro particles of bismuth trioxide (Bi2O3). Brazilian Journal of Radiation Sciences, v. 12, n. 4B, p. 1-11, 2024. DOI: 10.15392/2319-0612.2024.2728. Disponível em: https://repositorio.ipen.br/handle/123456789/49625. Acesso em: 29 Apr 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.