Cost effective preparation of Si3N4 ceramics with improved thermal conductivity and mechanical properties

doi:10.1016/j.jeurceramsoc.2019.10.003

SIC OpenIR

	Cost effective preparation of Si3N4 ceramics with improved thermal conductivity and mechanical properties
	Duan, YS; Liu, N; Zhang, JX; Zhang, H; Li, XG
	2020-02-01
Source Publication	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN	0955-2219
Issue	2 Pages:298
Subtype	Article
Abstract	High-purity silicon powder is used as the starting material for cost-effective preparation of silicon nitride ceramics with both high thermal conductivity and excellent mechanical properties using RE2O3 (RE= Y, La or Er) and MgO as sintering additives. Nitridation is a key procedure that would affect the properties of green bodies and the sintered samples. The beta: (alpha+beta) ratio can be increased as the samples nitrided at 1450 degrees C and a large amount of long rod-like beta-Si3N4 grains were developed in the samples. It was found that the addition of Er2O3-MgO could help to improve the mechanical properties of the sintered Si3N4 ceramics, the thermal conductivity, flexural strength and fracture toughness of the sample were 90 W/(m.K), 953 +/- 28.3 MPa and 10.64 +/- 0.61 MPa.m(1/2), respectively. The RE3+ species with larger ionic radius tended to increase the oxygen of nitrided samples and decrease N/O ratio (triangle grain boundary) of sintered samples.
DOI	10.1016/j.jeurceramsoc.2019.10.003
WOS Keyword	BONDED SILICON-NITRIDE ; PHASE-TRANSFORMATION ; OXYGEN-CONTENT ; POWDER ; MICROSTRUCTURE ; SI ; BETA-SI3N4 ; ADDITIVES ; KINETICS ; GROWTH
Language	英语
WOS Research Area	Materials Science
Publisher	ELSEVIER SCI LTD
Citation statistics	Cited Times:8[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/28351
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Duan, YS,Liu, N,Zhang, JX,et al. Cost effective preparation of Si3N4 ceramics with improved thermal conductivity and mechanical properties[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2020(2):298.
APA	Duan, YS,Liu, N,Zhang, JX,Zhang, H,&Li, XG.(2020).Cost effective preparation of Si3N4 ceramics with improved thermal conductivity and mechanical properties.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY(2),298.
MLA	Duan, YS,et al."Cost effective preparation of Si3N4 ceramics with improved thermal conductivity and mechanical properties".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY .2(2020):298.

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