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Growth, optical and electrical properties of pure and mn-doped na0.5bi0.5tio3 lead-free piezoelectric crystals

文献类型：期刊论文

作者Ge, Wenwei1,2,3; Liu, Hong4; Zhao, Xiangyong1,2; Zhong, Weizhuo1,2; Pan, Xiaoming1,2; He, Tianhou1,2; Lin, Di1,2; Xu, Haiqing1,2; Jiang, Xiangping4; Luo, Haosu1,2
刊名Journal of alloys and compounds
出版日期2008-08-25
卷号462期号:1-2页码:256-261
关键词Ferroelectrics Crystal growth X-ray diffraction Dielectric response Piezoelectricity
ISSN号0925-8388
DOI10.1016/j.jallcom.2007.08.006
通讯作者Ge, wenwei(wenweige@hotmail.com)
英文摘要In this paper, polycrystalline materials of na0.5bi0.5tio3 and 1 at.% mn-doped na0.5bi0.5tio3 (abbreviated as nbt and mn:nbt) were synthesized by solid-state reaction techniques. single crystals were successfully grown by using the top-seeded solution growth (tssg) method, which dimensions are phi 40 mm x 10 mm for pure nbt crystal and phi 30 mm x 10 mm for mn:nbt crystal. x-ray powder diffraction results show that the as-grown nbt and mn:nbt crystal all possess the perovskite structure and belongs to the rhombohedral system and their unit cell constants are almost the same with each other, which are a = b = c = 3.8825 angstrom, alpha = beta = gamma = 89.22 degrees for mn: nbt crystal and a = b = c = 3.8858 angstrom, alpha = beta = gamma = 89.25 degrees for nbt crystal. the cubic crystallization morphology of nbt crystal can be explained by the model of anionic coordination polyhedral growth-units. room temperature absorption spectra indicates the existence of mn3+ ions in the as-grown mn:nbt crystal. at room temperature, the dielectric constant of < 0 0 1 >-oriented nbt is 720 at 1 khz and it decreases to 600 for < 0 0 1 >-oriented mn:nbt crystal. the phase transition temperature tm corresponding to dielectric constants maximum is moderately decreased from 340 degrees c to 330 degrees c by mn doping. mn substitution in the nbt crystal significantly increases the values of electromechanical coupling factors k(t), and piezoelectric constants d(33), which are 0.24 and 65 pc/n for nbt crystal, 0.52 and 130 pc/n for mn:nbt crystal, respectively. these results indicate that the mn substitution in the nbt crystal results in both hardening and softening effects due to the existence of mixed valence states of mn ions. (c) 2007 elsevier b.v. all fights reserved.
WOS关键词MORPHOTROPIC-PHASE-BOUNDARY ; SINGLE-CRYSTAL ; (NA0.5BI0.5)(0.94)BA0.06TIO3 CERAMICS ; FREE PIEZOCERAMICS ; BISMUTH-TITANATE ; MANGANESE ; BEHAVIOR ; SYSTEM ; (NA1/2BI1/2)TIO3-BATIO3 ; MICROSTRUCTURE
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000258076300054
出版者ELSEVIER SCIENCE SA
URI标识http://www.irgrid.ac.cn/handle/1471x/2384843
专题中国科学院大学
通讯作者Ge, Wenwei
作者单位1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 201800, Peoples R China
2.Chinese Acad Sci, Shanghai Inst Ceram, R&D Ctr Crystal, Shanghai 201800, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 10039, Peoples R China
4.Jingdezhen Ceram Inst, Dept Mat Sci & Engn, Jingdezhen 333001, Peoples R China
推荐引用方式
GB/T 7714		 Ge, Wenwei,Liu, Hong,Zhao, Xiangyong,et al. Growth, optical and electrical properties of pure and mn-doped na0.5bi0.5tio3 lead-free piezoelectric crystals[J]. Journal of alloys and compounds,2008,462(1-2):256-261.
APA Ge, Wenwei.,Liu, Hong.,Zhao, Xiangyong.,Zhong, Weizhuo.,Pan, Xiaoming.,...&Luo, Haosu.(2008).Growth, optical and electrical properties of pure and mn-doped na0.5bi0.5tio3 lead-free piezoelectric crystals.Journal of alloys and compounds,462(1-2),256-261.
MLA Ge, Wenwei,et al."Growth, optical and electrical properties of pure and mn-doped na0.5bi0.5tio3 lead-free piezoelectric crystals".Journal of alloys and compounds 462.1-2(2008):256-261.

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