Structure and electrical conductivity of 0.5CSBT-0.5BFO ceramics sintered in air and N2

In this study, 0.5Ca0.15Sr1.85Bi4Ti5O18(CSBT)-0.5BiFeO3(BFO) ceramics were synthesized, and the effects of different sintering atmospheres (air and N2) on their structure and electrical conductivity were reported. According to XRD, TEM, and Raman analyses, the 0.5CSBT-0.5BFO ceramics had a B2cb spac...

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Bibliographic Details
Published in:Ceramics international 2022-05, Vol.48 (10), p.14442-14450
Main Authors: Liu, Huiying, Ma, Zhibiao, Guo, Xiaodong, Yao, Bingdong, Wang, Yangyang, Liu, Yan, Zhang, Fengqing, Sun, Huajun
Format: Article
Language:English
Subjects:
0.5CSBT-0.5BFO
CBH model
Impedance analysis
P-type conduction
TEM
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Summary:In this study, 0.5Ca0.15Sr1.85Bi4Ti5O18(CSBT)-0.5BiFeO3(BFO) ceramics were synthesized, and the effects of different sintering atmospheres (air and N2) on their structure and electrical conductivity were reported. According to XRD, TEM, and Raman analyses, the 0.5CSBT-0.5BFO ceramics had a B2cb space group (orthorhombic crystal structure) and an m=5 bismuth layered perovskite structure, except the Bi2O3 second phase (cubic, Pn-3m) is in the air-sintered sample. The XPS analysis results show that the air-sintered sample had a greater hole (h•) concentration than the N2-sintered sample. The impedance and conductivity investigation results show that the 0.5CSBT-0.5BFO ceramics had p-type and CBH conduction mechanisms.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2022.01.337