Crystal structure and electrical properties of textured Ba2Bi4Ti5O18 ceramics

被引：21

作者：

Cao, Jun ^{[1
]}

Koval, Vladimir ^{[2
]}

Zhang, Hangfeng ^{[1
]}

Lin, Yunyin ^{[1
]}

Wu, Jiyue ^{[1
]}

Meng, Nan ^{[1
]}

Li, Yan ^{[4
]}

Li, Zheng ^{[1
]}

Zhang, Hongtao ^{[3
]}

Yan, Haixue ^{[1
]}

机构：

[1] Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England

[2] Slovak Acad Sci, Inst Mat Res, Watsonova 47, Kosice 04001, Slovakia

[3] Loughborough Univ, Dept Mat, Loughborough LE11 3TU, Leics, England

[4] China Univ Geosci, Gemmol Inst, Wuhan 430074, Hubei, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2019年 / 39卷 / 04期

关键词：

Ba2Bi4Ti5O18; Texture; Relaxor ferroelectrics; Bismuth layer-structured ferroelectrics; Energy storage; FERROELECTRIC PROPERTIES; PHASE-TRANSITION; ORIENTATION; DEPENDENCE; BEHAVIOR; OXIDES;

D O I：

10.1016/j.jeurceramsoc.2018.12.017

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Highly textured Ba2Bi4Ti5O18 ceramic was prepared by spark plasma sintering (SPS). X-ray diffraction of the ceramics revealed the coexistence of a major ferroelectric phase (Space group, SG: B2cb) and a minor para-electric phase (SG: I4/nunm) at room temperature. A diffused phase transition was observed at around 240 degrees C. The evolution of the switching current peaks in the electric current vs. electric field (I-E) loops with increasing temperature was interpreted by the structural changes and temperature dependent polarisation reversal processes. The slim polarisation vs. electric field (P-E) loops, the extra switching current peaks in the I-E loops and the non-zero piezoelectric d(33) coefficient indicate that Ba2Bi4Ti5O18 is a relaxor ferroelectric material. The recoverable energy density (0.41 +/- 0.01 J/cm(3)) of Ba2Bi4Ti5O18 ceramics in the perpendicular direction to the SPS pressing direction is close to that of Pb(Mg1/3Nb2/3)O-3-based ceramics. The obtained results suggest Ba2Bi4Ti5O18 ceramics might be promising for energy storage applications.

引用

页码：1042 / 1049

页数：8

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