High thermal conductivity silicon nitride ceramics prepared by pressureless sintering with ternary sintering additives

doi:10.1111/ijac.13220

	High thermal conductivity silicon nitride ceramics prepared by pressureless sintering with ternary sintering additives
	Duan, Yusen; Zhang, Jingxian; Li, Xiaoguang; Bai, Hainan; Sajgalik, Pavol; Jiang, Dongliang
刊名	INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
	2019-07-01
卷号	16 期号:4 页码:1399
关键词	pressureless sintering silicon nitride ternary sintering additives thermal conductivity
ISSN号	1546-542X
DOI	10.1111/ijac.13220
文献子类	Article
英文摘要	Silicon nitride ceramics were pressureless sintered at low temperature using ternary sintering additives (TiO2, MgO and Y2O3), and the effects of sintering aids on thermal conductivity and mechanical properties were studied. TiO2-Y2O3-MgO sintering additives will react with the surface silica present on the silicon nitride particles to form a low melting temperature liquid phase which allows liquid phase sintering to occur and densification of the Si3N4. The highest flexural strength was 791(+/- 20) MPa with 12 wt% additives sintered at 1780 degrees C for 2 hours, comparable to the samples prepared by gas pressure sintering. Fracture toughness of all the specimens was higher than 7.2 MPa center dot m(1/2) as the sintering temperature was increased to 1810 degrees C. Thermal conductivity was improved by prolonging the dwelling time and adopting the annealing process. The highest thermal conductivity of 74 W/(m center dot K) was achieved with 9 wt% sintering additives sintered at 1810 degrees C with 4 hours holding followed by postannealing.
WOS研究方向	Materials Science
语种	英语
出版者	WILEY
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27016]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Duan, Yusen,Zhang, Jingxian,Li, Xiaoguang,et al. High thermal conductivity silicon nitride ceramics prepared by pressureless sintering with ternary sintering additives[J]. INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY,2019,16(4):1399.
APA	Duan, Yusen,Zhang, Jingxian,Li, Xiaoguang,Bai, Hainan,Sajgalik, Pavol,&Jiang, Dongliang.(2019).High thermal conductivity silicon nitride ceramics prepared by pressureless sintering with ternary sintering additives.INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY,16(4),1399.
MLA	Duan, Yusen,et al."High thermal conductivity silicon nitride ceramics prepared by pressureless sintering with ternary sintering additives".INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY 16.4(2019):1399.