Ferroelectric properties of dense nanocrystalline BaTiO3 ceramics

被引:125
作者
Buscaglia, MT
Buscaglia, V
Viviani, M
Petzelt, J
Savinov, M
Mitoseriu, L
Testino, A
Nanni, P
Harnagea, C
Zhao, Z
Nygren, M
机构
[1] CNR, Inst Energet & Interphases, I-16149 Genoa, Italy
[2] Acad Sci, Inst Phys, Prague 18221 8, Czech Republic
[3] Univ Genoa, Dept Chem & Proc Engn, I-16129 Genoa, Italy
[4] Alexandru Ioan Cuza Univ, Dept Elect, Iasi 700506, Romania
[5] Univ Quebec, INRS, EMT, Varennes, PQ J3X 1S2, Canada
[6] Univ Stockholm, Arrhenius Lab, Dept Inorgan Chem, S-10691 Stockholm, Sweden
关键词
D O I
10.1088/0957-4484/15/9/001
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Dense BaTiO3 ceramics with 50 nm average grain size obtained by spark plasma sintering were investigated. The dielectric data show a broad ferro-para phase transition with a maximum permittivity of approximate to1100 at 390 K and 1 kHz. The local ferroelectric switching behaviour was investigated by piezoresponse force microscopy. Typical piezoelectric hysteresis loops were recorded at different positions of the sample. The present results provide experimental evidence for polarization switching at the local scale, indicating that the critical grain size for the disappearance of ferroelectric behaviour in dense, bulk BaTiO3 nanocrystalline ceramics is below 50 nm.
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页码:1113 / 1117
页数:5
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