Properties of neodymium-doped Ca0.15Sr1.85Bi4Ti5O18 ferroelectric ceramics

Fan, Suhua; Zhang, Fengqing; Liu, Guitao; Tian, Qingbo; Zhu, Luyi

doi:10.1007/s10854-011-0362-5

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2015

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“…This compound possesses a typical bismuth layer perovskite structure, in which perovskite blocks (SrNb 2 O 7 ) 2-, composed of double NbO 6 octahedra are interleaved with (Bi 2 O 2 ) layers. However, BLSFs have fatal weaknesses that a high coercive field (E c ) and a very low piezoelectric constant (d 33 ), making it difficult for BLSFs to reveal their piezoelectric properties [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Dielectric, ferroelectric and piezoelectric properties of Ca0.1Sr0.9Bi2Nb2O9 ceramic

Yao

Chu

et al. 2015

J Mater Sci: Mater Electron

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Ca x Sr 1-x Bi 2 Nb 2 O 9 , as one of Aurivillius ceramics, was prepared by a conventional solid-state reaction method. The X-ray diffraction study showed that the ceramic possess a pure structure and no secondary phase can be detected. The scanning electron microscopy indicates that the grains of all the samples are all welldefined, but no obvious impact on the size of the ceramics. The dielectric, ferroelectric and piezoelectric properties of the Ca 0.1 Sr 0.9 Bi 2 Nb 2 O 9 were investigated and found that the Curie temperature (T c ), piezoelectric constant (d 33 ), remnant polarization (2P r ) and coercive field (E c ) were about 552°C, 18 pC/N, 15.34 lC/cm 2 and 47.75 kV/cm, respectively. Meanwhile, the impedance and dielectric properties of this piezoceramic for practical applications have also been discussed.

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