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Single-source-precursor derived RGO/CNTs-SiCN ceramic nanocomposite with ultra-high electromagnetic shielding effectiveness

Liu, Xingmin and Yu, Zhaoju and Ishikawa, Ryo and Chen, Lingqi and Liu, Xiaofei and Yin, Xiaowei and Ikuhara, Yuichi and Riedel, Ralf (2017):
Single-source-precursor derived RGO/CNTs-SiCN ceramic nanocomposite with ultra-high electromagnetic shielding effectiveness.
In: Acta Materialia, Elsevier Science Publishing, pp. 83-93, 130, ISSN 13596454, [Online-Edition: https://doi.org/10.1016/j.actamat.2017.03.031],
[Article]

Abstract

For the first time, single-source-precursors (SSPs) were synthesized through chemical modification of a commercial poly(methylvinyl)silazane with chemically bonded graphene oxide and carbon nanotube hybrids (GO/CNTs). After pyrolysis of warm-pressed and consolidated SSP-powders at 1000 °C in Ar, monolithic SiCN ceramic nanocomposites modified with in-situ thermally reduced GO/CNTs, namely RGO/CNTs-SiCN, were successfully obtained. The SSP-derived nanocomposite exhibits significantly enhanced dielectric properties if compared with that of a physically-blended-precursor derived reference material. Moreover, the SSP-derived RGO/CNTs-SiCN composite containing 15.0 wt% GO/CNTs in the feed possesses an electromagnetic shielding effectiveness of 67.2 dB with a sample thickness of 2.00 mm, which is the highest value among all the reported graphene-based composites with comparable thickness.

Item Type: Article
Erschienen: 2017
Creators: Liu, Xingmin and Yu, Zhaoju and Ishikawa, Ryo and Chen, Lingqi and Liu, Xiaofei and Yin, Xiaowei and Ikuhara, Yuichi and Riedel, Ralf
Title: Single-source-precursor derived RGO/CNTs-SiCN ceramic nanocomposite with ultra-high electromagnetic shielding effectiveness
Language: English
Abstract:

For the first time, single-source-precursors (SSPs) were synthesized through chemical modification of a commercial poly(methylvinyl)silazane with chemically bonded graphene oxide and carbon nanotube hybrids (GO/CNTs). After pyrolysis of warm-pressed and consolidated SSP-powders at 1000 °C in Ar, monolithic SiCN ceramic nanocomposites modified with in-situ thermally reduced GO/CNTs, namely RGO/CNTs-SiCN, were successfully obtained. The SSP-derived nanocomposite exhibits significantly enhanced dielectric properties if compared with that of a physically-blended-precursor derived reference material. Moreover, the SSP-derived RGO/CNTs-SiCN composite containing 15.0 wt% GO/CNTs in the feed possesses an electromagnetic shielding effectiveness of 67.2 dB with a sample thickness of 2.00 mm, which is the highest value among all the reported graphene-based composites with comparable thickness.

Journal or Publication Title: Acta Materialia
Volume: 130
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Single-source-precursor, Ceramic nanocomposite, RGO/CNTs hybrids, Dielectric properties, Electromagnetic shielding
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 11 Jul 2017 11:26
Official URL: https://doi.org/10.1016/j.actamat.2017.03.031
Identification Number: doi:10.1016/j.actamat.2017.03.031
Funders: Z. Y. thanks the Natural Science Foundation of Fujian Province of China (No. 2015J01221) for financial support., X. L. acknowledges the financial support from China Scholarship Council (CSC) (201406290019)., R. I. and Y. I. acknowledge support from the Joint Research Project between Japan and Germany through JSPS Bilateral Program and the Exploratory Research program of MEXT, Core-to-Core Program of JSPS.
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