Two-step sintering strategy to prepare dense Li-Garnet electrolyte ceramics with high Li+ conductivity

doi:10.1016/j.ceramint.2017.12.217

	Two-step sintering strategy to prepare dense Li-Garnet electrolyte ceramics with high Li+ conductivity
	Huang, Xiao 2; Xiu, Tongping ; Badding, Michael E.; Wen, Zhaoyin 2
刊名	CERAMICS INTERNATIONAL
	2018
卷号	44 期号:5 页码:5660
关键词	Solid electrolyte Composite ceramic Garnet type electrolyte High strength Sintering strategy High conductivity Dense microstructure
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2017.12.217
英文摘要	One of the typical solid-state sintering strategies for Li-Garnet solid electrolytes is firing the green ceramics at one specific sintering temperature for a long period of time. When the sintering temperature is too low, the contact between grains is not good, resulting in relatively low relative density and poor conductivity. When the temperature is too high, the abnormal grain growth (AGG) phenomenon of Li-Garnet may occur, resulting in low strength. In this work, a novel two-step sintering strategy is applied to prepare Li-Garnet ceramics. This method involves one short-time high-temperature sintering process and one long-time low-temperature annealing process. Li6.4La3Zr1.4Ta0.6O12 (LLZTO)-MgO composite electrolyte ceramics sintered by this method can have the properties of high conductivity (5.0 x 10(-4) S cm(-1)) at room temperature (RT), high relative density (98%), dense cross-sectional microstructure and high fracture strength (160 MPa). Besides, pure LLZTO ceramics sintered via two-step method shows dense microstructure, high conductivity (7.3 x 10(-4) S cm(-1)) at room temperature and high relative density (97%).
学科主题	Materials Science, Ceramics
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000425204400149
资助机构	This work was financially supported by Corning Incorporated, the National Natural Science Foundation of China under Grant no. 51772315, No. 51402330 and No. 51432010 and Key Fundamental Research Project from Science and Technology Commission of Shanghai Municipality (14JC1493000). ; This work was financially supported by Corning Incorporated, the National Natural Science Foundation of China under Grant no. 51772315, No. 51402330 and No. 51432010 and Key Fundamental Research Project from Science and Technology Commission of Shanghai Municipality (14JC1493000).
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25060]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai 200050, Peoples R China 2.Xiu, Tongping; Badding, Michael E.] Corning Inc, Corning, NY 14831 USA 3.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, Xiao,Xiu, Tongping,Badding, Michael E.,et al. Two-step sintering strategy to prepare dense Li-Garnet electrolyte ceramics with high Li+ conductivity[J]. CERAMICS INTERNATIONAL,2018,44(5):5660, 5667.
APA	Huang, Xiao,Xiu, Tongping,Badding, Michael E.,&Wen, Zhaoyin.(2018).Two-step sintering strategy to prepare dense Li-Garnet electrolyte ceramics with high Li+ conductivity.CERAMICS INTERNATIONAL,44(5),5660.
MLA	Huang, Xiao,et al."Two-step sintering strategy to prepare dense Li-Garnet electrolyte ceramics with high Li+ conductivity".CERAMICS INTERNATIONAL 44.5(2018):5660.