STUDY OF THE NON-NBT PHASE INSrDOPED NBT THIN FILMS

Huizhong Xu (), Yaping Wang, Daji Li, Jianyuan Xu, Zhuo Wang and Liang Zhen
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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
Jianyuan Xu: Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, 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 06, 1-6

Abstract: The morphology, composition and mechanism of the non-NBT phase in theSr-doped NBT [SNBT,(Na0.5Bi0.5)1-xSrxTiO3] thin films by chemical method were investigated using XRD, SEM, crystallization analysis and thermodynamics analysis. The results showed that the non-NBT phase is the porphyroblastic grains in the matrix and looks like a plate-shaped polyhedron. The mechanism of the non-NBT phase formation is that theSr2+andNa+combined with${\rm TiO}_{3}^{2-}$to form initial simple titanate, such asSrTiO3,Na2TiO3, or NBT phase decomposed because of the volatilization ofBiunder a higher annealing temperature or longer annealing duration, and then transform into the secondary simple titanates(Sr2+,2Na+)TiO3or(Sr,Na)xTiyOz. Moreover, the NBT phase disappeared for the SNBT films annealing at temperatures higher than 600°C and for 15 min.

Keywords: Ferroelectric material; thin film; sodium-bismuth-titanate; Sr-doped NBT; non-NBT phase (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1142/S0218625X1350056X

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