Thermal cycling stability of novel hexagonal boron nitride (h-BN)/glass compressive seals for planar intermediate temperature solid oxide fuel cells

doi:10.1016/j.jallcom.2020.155620

	Thermal cycling stability of novel hexagonal boron nitride (h-BN)/glass compressive seals for planar intermediate temperature solid oxide fuel cells
	Li, Ruizhu 2; Wang, Xiaochun 2; Peng, Lian 1; Jiang, Bowen 2; Yang, Jiajun 2; Yan, Dong 2; Pu, Jian 2; Chi, Bo 2; Li, Jian 2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2020-11-30
卷号	843 页码:7
关键词	Solid oxide fuel cell Seals Leakage rates Boron nitride Thermal cycle stability
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2020.155620
英文摘要	The novel h-BN/glass compressive seals were investigated for use in solid oxide fuel cell. The glass was mixed with h-BN powders to obtain composite materials using tape casting technique. Leakage rates were measured below 0.012 sccm/cm under input gas pressure of 6.8 kPa. Seals containing 40% by weight glass showed excellent thermal cycle and long-term operation stability. The leakage rates were reduced by more than half after ten thermal cycles under different input gas pressure. Also, the leakage rates gradually decreased to 0.008 sccm/cm under input gas pressure of 20.4 kPa at 750 degrees C during 208 h, and then remained stable. These observations can be explained by liquid B2O3 films having gradually formed on the h-BN surface. Boron oxidation effectively improved bondage for both interface and interior particles. This phenomenon was interpreted by seals' microstructure analyses and transmission electron microscopy. Finally, an evolution model is proposed to explain the process. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Science Foundation of China[51572099] ; National Science Foundation of China[51772114] ; National Defense Pre-Research Foundation of China[61402710102] ; National Key Research & Development Project-International Cooperation Program[2016YFE0126900]
WOS关键词	GLASS-CERAMIC SEALANT ; COMPOSITE SEALS ; OPTIMIZATION
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000554894500004
资助机构	National Science Foundation of China ; National Defense Pre-Research Foundation of China ; National Key Research & Development Project-International Cooperation Program
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/41571]
专题	中国科学院过程工程研究所
通讯作者	Pu, Jian
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing, Peoples R China 2.Huazhong Univ Sci & Technol, Wuhan, Peoples R China
推荐引用方式 GB/T 7714	Li, Ruizhu,Wang, Xiaochun,Peng, Lian,et al. Thermal cycling stability of novel hexagonal boron nitride (h-BN)/glass compressive seals for planar intermediate temperature solid oxide fuel cells[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,843:7.
APA	Li, Ruizhu.,Wang, Xiaochun.,Peng, Lian.,Jiang, Bowen.,Yang, Jiajun.,...&Li, Jian.(2020).Thermal cycling stability of novel hexagonal boron nitride (h-BN)/glass compressive seals for planar intermediate temperature solid oxide fuel cells.JOURNAL OF ALLOYS AND COMPOUNDS,843,7.
MLA	Li, Ruizhu,et al."Thermal cycling stability of novel hexagonal boron nitride (h-BN)/glass compressive seals for planar intermediate temperature solid oxide fuel cells".JOURNAL OF ALLOYS AND COMPOUNDS 843(2020):7.