Electrical Conductivity Of Silicon Carbonitride-Reduced Graphene Oxide Composites

Keywords

composites; electrical properties; graphite; polymer precursor

Abstract

Silicon carbonitride ceramics–reduced graphene oxide (SiCN–rGO) composites are synthesized using polyvinylsilazne (PVSZ) and GO as precursors and N-dimethylformamide (DMF) as a solvent. We find that the electrical conductivity of SiCN–rGO composites exhibits nonmonotonic changes as a function of GO concentrations, in which the conductivity increases by six orders of magnitude from 7.41E-09 (Ω/cm)−1 to 4.35E-03 (Ω/cm)−1 after the integration of 0.2 wt% GO, followed by three orders of magnitude drop to 3.34E-06 (Ω/cm)−1 when 0.3 wt% GO is integrated. Based on the energy-dispersive spectroscopy and Raman spectroscopy analysis, we conclude that the conductive behavior of SiCN–rGO composites is controlled by both the concentration and the distribution of “free-carbon” in the composites.

Publication Date

11-1-2017

Publication Title

Journal of the American Ceramic Society

Volume

100

Issue

11

Number of Pages

5113-5119

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1111/jace.15025

Socpus ID

85021380957 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85021380957

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