Role of oxygen-vacancy in piezoelectric properties and fatigue behavior of (Bi0.5Na0.5)0.93Ba0.07Ti1+xO3 ceramics |
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| Authors: | Xuanrui Jia Jingji Zhang Lejian Wang Jiangying Wang Huiwei Du Yaxuan Yao Lingling Ren Fei Wen Peng Zheng |
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| Affiliation: | 1. College of Materials Science and Engineering, China Jiliang University, Hangzhou, China;2. Division of Nano Metrology and Materials Measurement, National Institute of Metrology, Beijing, China;3. College of Electronics and Information, Hangzhou Dianzi University, Hangzhou, China |
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| Abstract: | In this reported study, (Bi0.5Na0.5)0.93Ba0.07Ti1+xO3 (abbreviated as BNBT1+x) ceramics, containing Ti-nonstoichiometry that ranged from a 2% deficiency to a 1% excess, were designed and systematically characterized. The results of the X-ray diffraction Rietveld refinement and X-ray photoelectron spectroscopy analysis of these materials revealed that the amount of Ti in the BNBT1+x ceramics significantly affected the degree of coexistent rhombohedral/tetragonal phases and also affected the content of singly/doubly charged oxygen-vacancy ( / ) in the ceramics. After poling and 105 fatigue cycles, the variation in Raman resonance line-width of the Ti–O bond in the BNBT1+x ceramics was found to be strongly dependent on the amount of Ti in the ceramic. The  → transformation and clustering of the  defects under electrical loading were considered to be a critical factor in electric field-induced structural transition and fatigue properties of the material. |
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| Keywords: | fatigue behavior nonstoichiometry Rietveld refined spectroscopy structural transition |
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