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Heat‐resistant unfired phosphate ceramics with carbon nanotubes for electromagnetic application
Author(s) -
Plyushch Artyom,
Bychanok Dzmitry,
Kuzhir Polina,
Maksimenko Sergey,
Lapko Konstantin,
Sokol Alexey,
Macutkevic Jan,
Banys Juras,
Micciulla Federico,
Cataldo Antonino,
Bellucci Stefano
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201431306
Subject(s) - carbon nanotube , materials science , resistor , composite material , dielectric , percolation threshold , percolation (cognitive psychology) , ceramic , capacitor , composite number , ceramic matrix composite , carbon fibers , conductivity , hot pressing , electrical resistivity and conductivity , optoelectronics , electrical engineering , voltage , chemistry , neuroscience , biology , engineering
Composite materials, containing low concentrations of carbon nanotubes (CNTs) of three different diameters and heat‐resistant phosphate ceramic as a matrix were prepared by cold‐pressing method. Their dielectric properties were studied at room temperature in a wide frequency range (20 Hz–1 MHz). It was found experimentally and proved theoretically via modeling of the composites as a random capacitor–resistor–diode network that electrical percolation concentration depends significantly on the diameter of the nanoinclusions. The main conclusion is that the best candidate providing both the lower percolation threshold and high absolute values of ac conductivity is thinner carbon nanotubes (in our particular case, 8–15 nm).