TY - JOUR
T1 - Effect of oxygen treatment on structure and electrical properties of Mn-doped Ca0.6Sr0.4TiO3 ceramics
AU - Zhang, Lin
AU - Yao, Zhonghua
AU - Lanagan, Michael T.
AU - Hao, Hua
AU - Xie, Juan
AU - Xu, Qi
AU - Yuan, Mengxue
AU - Sarkarat, Maryam
AU - Cao, Minghe
AU - Liu, Hanxing
N1 - Funding Information:
This work was supported by NSFC-Guangdong Joint Funds of the Natural Science Foundation of China (No. U1601209 ), the National Key Basic Research Program of China (973 Program) (No. 2015CB654601 ), the Natural Science Foundation of China (No. 51372191 ), the Fundamental Research Funds for the Central Universities ( WUT: 2016-YB-006 ), and the China Scholarship Council (CSC) .
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/6
Y1 - 2018/6
N2 - Different oxygen treatment methods, including O2 and N2 annealing, were conducted on Ca0.6Sr0.4TiO3 (CST) ceramics with varying Mn content (0 mol%, 0.5 mol% and 2.0 mol%). Structure characterization, including XRD and SEM, indicated the minimal effect of annealing on the microstructure. Grain boundaries were found to be sensitive to oxygen treatments, and annealing in O2 resulted in increased grain boundary resistance, while in N2 led to the opposite result. The insulating properties of bulk ceramics were found to be dominated by grain boundaries. Both the concentration and mobility of oxygen vacancies were confirmed to affect the energy storage properties to some extent in this work.
AB - Different oxygen treatment methods, including O2 and N2 annealing, were conducted on Ca0.6Sr0.4TiO3 (CST) ceramics with varying Mn content (0 mol%, 0.5 mol% and 2.0 mol%). Structure characterization, including XRD and SEM, indicated the minimal effect of annealing on the microstructure. Grain boundaries were found to be sensitive to oxygen treatments, and annealing in O2 resulted in increased grain boundary resistance, while in N2 led to the opposite result. The insulating properties of bulk ceramics were found to be dominated by grain boundaries. Both the concentration and mobility of oxygen vacancies were confirmed to affect the energy storage properties to some extent in this work.
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U2 - 10.1016/j.jeurceramsoc.2018.01.027
DO - 10.1016/j.jeurceramsoc.2018.01.027
M3 - Article
AN - SCOPUS:85041180409
SN - 0955-2219
VL - 38
SP - 2534
EP - 2540
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 6
ER -