Dielectric properties of nanocomposite ceramics Al2O3 / graphene processed by spark plasma sintering

被引：13

作者：

Stolyarov, V. V. ^{[1
,2
,3
]}

Frolova, A., V ^{[2
,3
]}

Sudzhanskaya, I., V ^{[4
]}

机构：

[1] Mech Engn Res Inst, Maly Kharitonyevsky Pereulok 4, Moscow 101990, Russia

[2] Natl Res Nucl Univ MEPhI, Kashirskoe Shosse 31, Moscow 115409, Russia

[3] Inst Struct Macrokinet ISMAN, Academician Osipyan Str 8, Chernogolovka 142432, Russia

[4] Belgorod Natl Res Univ, Pobedy St 85, Belgorod 308015, Russia

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 05期

基金：

俄罗斯科学基金会;

关键词：

Sintering; Nanocomposite; Electrical properties; Al2O3; ELECTRICAL-PROPERTIES; RAMAN-SPECTROSCOPY; COMPOSITES;

D O I：

10.1016/j.ceramint.2019.11.188

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Al2O3/graphene nanocomposites with graphene contents of 1 and 2 wt % were obtained by the SPS method and were characterized by means of electron microscopy and Raman spectroscopy. The aim of this work was to study the effect of graphene content on the temperature and frequency dependences of the electrical resistivity in nanocomposite ceramics. Using the impedance method with alternating current, the ceramic materials were studied over a wide temperature range, 23-530 degrees C and over a frequency range of 10(-1) - 10(6) Hz. More than a half decrease in the porosity of the sintered composite with an increase in the graphene content was observed. Raman spectroscopy indicated the absence of graphene degradation during the SPS. The range of frequencies (10(6)-10(3) Hz) and temperatures (23-130 degrees C) in which the dielectric can exhibit electron or ionic conductivity were determined.

引用

页码：6920 / 6925

页数：6

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