Composition dependent microwave properties of dielectric-conductor nanocomposites

0498279 - FZÚ 2019 RIV GB eng J - Článek v odborném periodiku
Bovtun, Viktor - Kempa, Martin - Nuzhnyy, Dmitry - Petzelt, Jan - Borisova, O. - Machulianskyi, O. - Yakymenko, Y.
Composition dependent microwave properties of dielectric-conductor nanocomposites.
Phase Transitions. Roč. 91, č. 9-10 (2018), s. 1027-1035. ISSN 0141-1594. E-ISSN 1029-0338
Grant CEP: GA MŠMT EF16_019/0000760
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR(CZ) PAN-17-04
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: dielectric spectroscopy * microwave absorption * shielding efficiency * dielectric-conductor nanocomposites
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.026, rok: 2018

Broadband dielectric spectra of dielectric-conductor nanocomposites of poly(ethylene terephthalate) with multiwalled carbon nanotubes (PET-xCNT) were used for calculation of their free-space shielding and absorbing parameters in the frequency range from 1 MHz to 1 THz. Revealed correlation of the composition and frequency dependent microwave dielectric and shielding/absorbing parameters allows determination of the CNT concentration range optimized for the shielding (x >= 0.4 vol%) and absorption (0.12 < x < 0.6 vol%) applications. Broadband (two frequency decades) 40 dB shielding, narrowband 30 divided by 40 dB absorption and high attenuation constant up to 10(4) neper/m were demonstrated.

Trvalý link: http://hdl.handle.net/11104/0290672