Internal friction and dielectric relaxation studies on the oxygen vacancy diffusion in the novel La2Mo2O9-based oxide-ion conductors

HFCAS OpenIR

	Internal friction and dielectric relaxation studies on the oxygen vacancy diffusion in the novel La2Mo2O9-based oxide-ion conductors
其他题名	Internal friction and dielectric relaxation studies on the oxygen vacancy diffusion in the novel La_2Mo_2O_9-based oxide-ion conductors
	2003
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
摘要	Both internal friction and dielectric relaxation techniques were applied to investigate the novel oxide-ion conductors La(2-x)A(x)Mo(2)O(9) (A=Ca, Bi, K; x=0-0.3). Two relaxation peaks associated with the short-distance diffusion of oxygen ions were observed on the curves of internal friction and dielectric loss versus temperature, indicating that there are at least two relaxation processes for oxygen ion diffusion. After doping La2Mo2O9 with different elements, both relaxation peaks shift toward higher temperature and the activation energy of oxygen ion diffusion increases, the height of the higher-temperature peak decreases while that of the lower-temperature peak increases slightly. After properly doping (e.g. 30%Ca, 5%Bi, or 5%K doping), the conductivity of doped La2Mo2O9 at low temperature increases in different degrees. Based on the experimental results and the crystalline structure, a physical picture for oxygen vacancy diffusion in La(2-x)A(x)Mo(2)O(9) samples is suggested.
关键词	SOLID ELECTROLYTES DOPED LAGAO3 CONDUCTIVITY SELECTION oxide-ion conductor SOFC La2MO2O9 internal friction dielectric relaxation
收录类别	CSCD
语种	英语
WOS记录号	WOS:000186981500003
CSCD记录号	CSCD:1266984
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录] 被引频次：4[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/57053
专题	中国科学院合肥物质科学研究院
推荐引用方式 GB/T 7714	. Internal friction and dielectric relaxation studies on the oxygen vacancy diffusion in the novel La2Mo2O9-based oxide-ion conductors[J]. ACTA METALLURGICA SINICA,2003,39.
APA	(2003).Internal friction and dielectric relaxation studies on the oxygen vacancy diffusion in the novel La2Mo2O9-based oxide-ion conductors.ACTA METALLURGICA SINICA,39.
MLA	"Internal friction and dielectric relaxation studies on the oxygen vacancy diffusion in the novel La2Mo2O9-based oxide-ion conductors".ACTA METALLURGICA SINICA 39(2003).