THE NEGATIVE EFFECT OF NON-NBT PHASE ON THE FERROELECTRIC PROPERTIES OF SR-DOPED NBT THIN FILM AND THE SOLUTIONS

Jianyuan Xu, Huizhong Xu (), Yaping Wang, Daji Li, Zhuo Wang and Liang Zhen
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Jianyuan Xu: Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
Huizhong Xu: School of Environment and Materials Engineering, Yantai University, Yantai 264005, P. R. China
Yaping Wang: Wenjing College, Yantai University, Yantai 264005, P. R. China
Daji Li: North Material Science and Engineering Technology, Group Corporation of China, Yantai 264003, P. R. China
Zhuo Wang: School of Environment and Materials Engineering, Yantai University, Yantai 264005, P. R. China
Liang Zhen: School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China

Surface Review and Letters (SRL), 2013, vol. 20, issue 02, 1-6

Abstract: Na0.5Bi0.5TiO3(NBT) is a kind of excellent lead-free ferroelectric material. However, during the preparation of the NBT thin film by the chemical methods, the non-NBT phase is easier to be formed, which has a negative effect on the ferroelectric properties. In this paper, theSr-doped NBT (SNBT) films were prepared by metal–organic solution deposition. The effects ofSr-doping amount, annealing temperature and duration on the appearance of non-NBT phase, and the relationship between the amount of non-NBT phase and the ferroelectric properties of the thin film was studied in detail. The results show that the appearance of the non-NBT phase in the SNBT is mainly because of the excessive amount of the doped ions or the excessive evaporation ofBicaused by long annealing duration. The excessive amount of the non-NBT phase will weaken the remanent polarization of the thin films. Using excessive 20% ofBiand reducing the annealing duration are the effective method for suppressing the non-NBT phase and improving the ferroelectricity of NBT-based film.

Keywords: Sodium-bismuth-titanate; ferroelectric thin film; Sr-doped NBT film; ferroelectric properties; non-NBT phase (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1142/S0218625X13500121

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