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Induced anisotropic behavior and enhanced electrical properties on hot-pressed strontium barium niobate ceramics
Chen, Hui1,2; Guo, Shaobo1; Yao, Chunhua1; Dong, Xianlin1; Mao, Chaoliang1; Wang, Genshui1
2017
Source PublicationCeramics International
ISSN02728842
Volume43Issue:4Pages:3610-3615
AbstractSr0.30Ba0.70Nb2O6(SBN30) ferroelectric ceramics were fabricated by conventional sintering (CS) and by hot-pressing sintering (HP) and their crystal structure, microstructure, dielectric, ferroelectric and pyroelectric properties were studied and compared. Preferred orientation of the HP ceramics was detected through X-ray diffraction. Dense microstructure virtually free of pores has been achieved in HP samples. Moreover, the HP samples manifested prominent anisotropy in electrical properties. Besides, the relative permittivity (Εr), saturated polarization (Ps), pyroelectric coefficient (p) in the direction perpendicular to the pressing axis were much higher than those of the randomly oriented CS samples. The HP samples sintered under 200 MPa show excellent pyroelectric properties in the direction perpendicular to the pressing axis, with pyroelectric coefficient of 2.38×10−8C/cm2K and pyroelectric figure of merit of Fi=1.13 pm/V, Fv=1.89 m2/C and Fd=0.63 μPa−1/2which roughly triple the values obtained in CS samples. These results indicate that hot-pressing is a viable option for accessing single-crystal-like anisotropy as well as enhanced electrical properties in polycrystalline ceramics, thus unveiling the distinctive potential of HP SBN30 ceramics for infrared detector applications. © 2016 Elsevier Ltd and Techna Group S.r.l.
DOI10.1016/j.ceramint.2016.11.198
EI Accession Number20165303196737
EI KeywordsNiobium compounds
EI Classification Number549.2 Alkaline Earth Metals - 701.1 Electricity: Basic Concepts and Phenomena - 812.1 Ceramics - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids - 933.1.1 Crystal Lattice
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25735
Collection中国科学院上海硅酸盐研究所
Affiliation1.Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China
Recommended Citation
GB/T 7714
Chen, Hui,Guo, Shaobo,Yao, Chunhua,et al. Induced anisotropic behavior and enhanced electrical properties on hot-pressed strontium barium niobate ceramics[J]. Ceramics International,2017,43(4):3610-3615.
APA Chen, Hui,Guo, Shaobo,Yao, Chunhua,Dong, Xianlin,Mao, Chaoliang,&Wang, Genshui.(2017).Induced anisotropic behavior and enhanced electrical properties on hot-pressed strontium barium niobate ceramics.Ceramics International,43(4),3610-3615.
MLA Chen, Hui,et al."Induced anisotropic behavior and enhanced electrical properties on hot-pressed strontium barium niobate ceramics".Ceramics International 43.4(2017):3610-3615.
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