We present an accurate measurement of the electrical conductivity of carbon/carbon (C/C) composites in higher range of microwave frequencies. The composite is an 8 mm thick C/C laminate 2D woven fabric, machined to create a rectangular waveguide. Transmission and reflection parameters are acquired within a broad frequency band, ranging from 23 to 30 GHz, and used for the evaluation of the power loss in the waveguide and to extract the C/C electrical conductivity. The obtained conductivity values at microwave frequencies are about ten times lower than those measured at very low frequencies. The effects of temperature are also investigated, and the variation of the conductivity with the temperature is reported.

Determination of the electrical conductivity of carbon/carbon at high microwave frequencies / Gradoni, Gabriele; Davide, Micheli; MARIANI PRIMIANI, Valter; Moglie, Franco; Mario, Marchetti. - In: CARBON. - ISSN 0008-6223. - STAMPA. - 54:(2013), pp. 76-85. [10.1016/j.carbon.2012.11.005]

Determination of the electrical conductivity of carbon/carbon at high microwave frequencies

GRADONI, GABRIELE;MARIANI PRIMIANI, Valter;MOGLIE, FRANCO;
2013-01-01

Abstract

We present an accurate measurement of the electrical conductivity of carbon/carbon (C/C) composites in higher range of microwave frequencies. The composite is an 8 mm thick C/C laminate 2D woven fabric, machined to create a rectangular waveguide. Transmission and reflection parameters are acquired within a broad frequency band, ranging from 23 to 30 GHz, and used for the evaluation of the power loss in the waveguide and to extract the C/C electrical conductivity. The obtained conductivity values at microwave frequencies are about ten times lower than those measured at very low frequencies. The effects of temperature are also investigated, and the variation of the conductivity with the temperature is reported.
2013
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11566/82793
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 46
  • ???jsp.display-item.citation.isi??? 39
social impact