2016
DOI: 10.17586/2220-8054-2016-7-1-214-219
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Electrophysical properties of shungites at low temperatures

Abstract: The temperature dependence of electrical conductivity and the shielding effectiveness of shungites have been studied at temperatures ranging from 77 to 300 K. The idiosyncrasies of temperature dependences for measuring electrical parameters were determined. Correlations of the π + σ plasmon energies with changes in the frequency dependence of shielding effectiveness on temperature were determined.

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Cited by 11 publications
(8 citation statements)
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“…The two different shungite samples were powdered and electrophysical parameters, such as the conductivity and the shielding effectiveness were measured. Measurements of shielding effectiveness (SE) and the electrical conductivity (σ) of untreated and heat-treated different shungite rocks were carried out as reported elsewhere [12]. For the heattreated nano-structured shungite rock with dominated hyperfullerene carbon, the σ doubled in magnitude and SE increased by 10 dB with an increase of carbon content by 1.5 % over the untreated sample.…”
Section: Methodsmentioning
confidence: 99%
“…The two different shungite samples were powdered and electrophysical parameters, such as the conductivity and the shielding effectiveness were measured. Measurements of shielding effectiveness (SE) and the electrical conductivity (σ) of untreated and heat-treated different shungite rocks were carried out as reported elsewhere [12]. For the heattreated nano-structured shungite rock with dominated hyperfullerene carbon, the σ doubled in magnitude and SE increased by 10 dB with an increase of carbon content by 1.5 % over the untreated sample.…”
Section: Methodsmentioning
confidence: 99%
“…Важнейшей областью технического применения шунгитов является создание на их основе радиопоглощающих экранов, особенно эффек-тивных в диапазоне СВЧ [3][4][5][6]. Так, в работе [3] показано, что эффек-тивность экранирования резко возрастает вблизи 0.7−1.0 GHz (на два порядка по сравнению с эффективностью при более низких частотах).…”
Section: поступило в редакцию 23 мая 2017 гunclassified
“…Так, в работе [3] показано, что эффек-тивность экранирования резко возрастает вблизи 0.7−1.0 GHz (на два порядка по сравнению с эффективностью при более низких частотах). В [4] в интервале 8−12 GHz отмечено насыщение поглощения на постоянном достаточно высоком уровне.…”
Section: поступило в редакцию 23 мая 2017 гunclassified
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