Structural phase transition, optical and pyroelectric properties of lead-free single crystalsReportar como inadecuado

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Chinese Science Bulletin

, Volume 58, Issue 33, pp 4064–4071

First Online: 16 August 2013Received: 12 December 2012Accepted: 21 February 2013DOI: 10.1007-s11434-013-5979-8

Cite this article as: Fang, B., Wang, M., Yuan, N. et al. Chin. Sci. Bull. 2013 58: 4064. doi:10.1007-s11434-013-5979-8


0.14 at% Mn-doped 0.95Na1-2Bi1-2TiO3-0.05BaTiO3 0.95NBT-0.05BT lead-free single crystals were grown by a top-seeded solution growth method TSSG. X-ray powder diffraction measurement showed that the as-grown single crystals exhibit rhombohedral perovskite structure with apparent distortion. With the increase of temperature, successive structural phase transitions occur in the Mn-doped 0.95NBT-0.05BT single crystals. After poling, apparent dielectric anomaly is induced accompanied by the increase of the character of diffuse phase transition and the decrease of the value of dielectric constant. The Mn-doped 0.95NBT-0.05BT single crystals exhibit complex domain structure, in which micro and macro domains coexist with statistically 4 mm symmetry. The Mn-doped 0.95NBT-0.05BT lead-free single crystals exhibit excellent piezoelectric and pyroelectric properties, which will lead to promising advance in piezoelectric and pyroelectric applications. The infrared-absorption band occurred around 630.6 cm can be assigned to the -stretching- normal vibration of Na1-2Bi1-2-Ti-O group. The three diffused Raman bands centered around 300, 560 and 800 cm can be attributed to F2g TiO6 bending vibration, A1g TiO6 stretching vibration and -soft mode- mixed by bending and stretching vibrations.

KeywordsMn-doped 0.95NBT-0.05BT single crystals structural phase transition domain configuration electrical properties This article is published with open access at

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Autor: BiJun Fang - Meng Wang - NingYi Yuan - JianNing Ding - XiangYong Zhao - HaiQing Xu - HaoSu Luo


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