粉体および粉末冶金
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
研究論文
Electrical and Thermal Properties of Nitrogen-Doped SiC Sintered Body
Yukina TAKIMettaya KITIWANHirokazu KATSUITakashi GOTO
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ジャーナル オープンアクセス

2018 年 65 巻 8 号 p. 508-512

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In this study, the effect of nitrogen (N) doping and microstructural changes on the electrical and thermal properties of silicon carbide (SiC) were investigated. SiC powder was treated in a N2 atmosphere at 1673, 1973 and 2273 K for 3 h and subsequently sintered by spark plasma sintering (SPS) at 2373 K for 300 s in a vacuum or in a N2 atmosphere. The a-axis of the N2-treated SiC powders was almost constant, while the c-axis slightly decreased with an increase in the temperature of N2 treatment. The relative density of the SiC powder sintered body decreased from 72% to 60% with an increase in the temperature of N2 treatment. The increase in temperature of N2 treatment caused a decrease in the thermal and electrical conductivities of the SiC. Upon N2 treatment at 1673 K and sintering in a N2 atmosphere, SiC exhibited a high electrical conductivity of 1.5 × 103 S m−1 at 1123 K. SiC exhibited n-type conduction, and the highest Seebeck coefficient was −310 μV K−1 at 1073 K.

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© 2018 by Japan Society of Powder and Powder Metallurgy

本論文はCC BY-NC-NDライセンスによって許諾されています.ライセンスの内容を知りたい方は,https://creativecommons.org/licenses/by-nc-nd/4.0/deed.jaでご確認ください.
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
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