Pyroelectric composite film for X-ray intensity detection
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Data
2012-04-01
Autores
Sakamoto, Walter Katsumi [UNESP]
Estevam, Giuliano Pierre [UNESP]
Carvalho, Aparecido Augusto de [UNESP]
Pontes, Wesley
Paula, Mauro Henrique de
Título da Revista
ISSN da Revista
Título de Volume
Editor
ABM, ABC, ABPol
Resumo
Composite material obtained with modified lead titanate (Pz34) ferroelectric ceramic and polyether-ether-ketone (PEEK) polymer matrix was used as sensitive component to measure X-ray intensity in a novel detection system. The sensing element works as a thermal transducer, converting a non-quantified thermal flux into an output measurable quantity of electrical voltage. The samples were obtained up to 60 vol.% of ceramic, by hot pressing the mixture of Pz34 and PEEK powders at 368 °C and applying 12 MPa pressure for 2.0 hours. The sensor response varies from 2.70 to 0.80 V in the energy fluence rate range of 6.30 to 37.20 W.m-2. The absorbed incident energy was analyzed as a function of the ionizing energy. Furthermore, by measuring the pyroelectric activity of the composite film it was observed that there is no degradation of the sensor after the irradiation.
Descrição
Palavras-chave
composite, pyroelectricity, X-ray radiation sensor
Como citar
Materials Research. ABM, ABC, ABPol, v. 15, n. 2, p. 198-203, 2012.