Enhancing pyroelectric property of Pb(Fe1/4Sc1/4Nb1/2)O3 ceramics

•Oxide doping and B-site oxide mixing route are good for synthesizing ferroelectrics.•Pb(Fe1/4Sc1/4Nb1/2)O3/PFSN ceramics exhibit pure rhombohedral perovskite structure.•The MnO2- and Li2CO3-doped PFSN ceramics exhibit improved electrical properties.•The doped PFSN ceramics exhibit excellent pyroele...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014-05, Vol.596, p.164-166
Main Authors: Liu, Chunlin, Qian, Kun, Lu, Fengxia, Chen, Zhihui, Fang, Bijun, Ding, Jianning, Shan, Yuejin, Imoto, Hideo
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Depolarization temperature
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Oxide doping
PFSN
Physics
Pyroelectric and electrocaloric effects
Pyroelectric property
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Summary:•Oxide doping and B-site oxide mixing route are good for synthesizing ferroelectrics.•Pb(Fe1/4Sc1/4Nb1/2)O3/PFSN ceramics exhibit pure rhombohedral perovskite structure.•The MnO2- and Li2CO3-doped PFSN ceramics exhibit improved electrical properties.•The doped PFSN ceramics exhibit excellent pyroelectric property.•The doped PFSN ceramics exhibit promising applications for pyroelectric devices. Oxide doping and B-site oxide mixing route are superior in synthesizing complex perovskite structure ferroelectric ceramics, in which the oxide-doped Pb(Fe1/4Sc1/4Nb1/2)O3 (PFSN) ceramics exhibit phase-pure rhombohedral perovskite structure, high relative density and excellent dielectric properties. The MnO2- and Li2CO3-doped PFSN ceramics exhibit large pyroelectric coefficient, being 518.9 and 578.8μC/Km2 at room temperature, respectively. The calculated pyroelectric figures of merit Fd and Fv exhibit excellent frequency stability and maintain almost stable within 100–2000Hz. The pyroelectric coefficient and the calculated pyroelectric figures of merit increase greatly with the increase of temperature, which deserves further research to improve their temperature stability. Such investigations reveal that high-performance pyroelectric materials can be prepared by oxide doping via the B-site oxide mixing route in the synthesis of PFSN-based ceramics.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2014.01.104