Issue 10, 2013
From the journal:

Journal of Materials Chemistry A

Fabrication of epoxy/silicon nitridenanowire composites and evaluation of their thermal conductivity†

Takafumi Kusunose,*a   Takashi Yagi,b   Shakhawat H. Firozc  and  Tohru Sekinod  

* Corresponding authors

a Department of Advanced Materials Science, Faculty of Engineering, Kagawa University, Hayashi-cho 2217-20, Takamatsu, 761-0396 Japan
E-mail: kusuno15@eng.kagawa-u.ac.jp
Fax: +81-87-864-2401
Tel: +81-87-864-2401

b National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563 Japan
E-mail: t-yagi@aist.go.jp
Fax: +81-29-861-4039
Tel: +81-29-861-4072

c Department of Chemistry, Bangladesh University of Engineering and Technology (BUET), Dhaka-1000, Bangladesh
E-mail: shfiroz@chem.buet.ac.bd
Fax: +880-2-861-3026
Tel: +880-2-966-5650

d Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577 Japan
E-mail: sekino@tagen.tohoku.ac.jp
Fax: +81-22-217-5832
Tel: +81-22-217-5832

Abstract

To improve the thermal conductivity of epoxy resins without losing the insulation, epoxy/silicon nitride (Si3N4) nanowire composites were produced. β-Si3N4 nanowires were synthesized by the carbothermal reduction and nitridation of a homogeneous mixture of silica (SiO2), carbon, and a small amount of cobalt via the vapor–liquid–solid (VLS) mechanism. The ratio of β to α phase in the product Si3N4 increased with heat-treatment temperature; however, the undesirable SiC also increased. By increasing the nitrogen gas pressure in the heat treatment, the ratio of β- to α-Si3N4 increased without producing SiC. The epoxy composite containing Si3N4 nanowires of 60 vol% showed a high thermal conductivity of 9.2 W m−1 K−1 along the preferred orientation of the nanowires.

Graphical abstract: Fabrication of epoxy/silicon nitride nanowire composites and evaluation of their thermal conductivity

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Article information

DOI
https://doi.org/10.1039/C3TA00686G
Article type
Paper
Submitted
13 Oct 2012
Accepted
09 Jan 2013
First published
10 Jan 2013

J. Mater. Chem. A, 2013,1, 3440-3445

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Fabrication of epoxy/silicon nitride nanowire composites and evaluation of their thermal conductivity

T. Kusunose, T. Yagi, S. H. Firoz and T. Sekino, J. Mater. Chem. A, 2013, 1, 3440 DOI: 10.1039/C3TA00686G

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