Citation: ZHANG Na-Na, PAN Xiao-Ru, SONG Ming-Jun, WANG Ji-Yang. Growth and Raman Study of Phase Transitions of the KTa_0.63Nb_0.37O₃ Crystal[J]. Chinese Journal of Structural Chemistry, ;2016, 35(3): 481-486. doi: 10.14102/j.cnki.0254-5861.2011-0921 shu

Growth and Raman Study of Phase Transitions of the KTa_0.63Nb_0.37O₃ Crystal

1.
a College of Chemistry & Chemical and Environmental Engineering, Weifang University, Weifang 261061, China;
2.
b State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

Received Date: 30 July 2015
Available Online: 20 October 2015
Fund Project: Higher Education and Technology Development Plan of Shandong Province (J15LA09, J14LA5) (BS2015CL012, ZR2014JL029)

The potassium tantalate niobate KTa_0.63Nb_0.37O₃ single crystal with large size and good quality was synthesized by Czochralski method. The crystal composition and structure were determined by electric probe microanalysis (EPMA) and X-ray diffraction (XRD) technique, respectively. The sequence of phase transitions of the as-grown crystal was investigated by Raman scattering technique. What features in the phonon spectrum corresponding to each phase transition, namely cubic to tetragonal (C-T), tetragonal to orthorhombic (T-R) and orthorhombic to rhom-bohedral (O-R), is discussed. Following the features the C-T phase transition point measured is in the vicinity of -40 ℃, and the difference from theoretical value was discussed; T-O phase transition point is at around -130 ℃, while the O-R phase transition point was not obtained due to the band overlapping and experiment limit.
- phase transitions,
- Raman scattering,
- potassium tantalate niobate
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Growth and Raman Study of Phase Transitions of the KTa0.63Nb0.37O3 Crystal

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通讯作者: 陈斌, bchen63@163.com

Growth and Raman Study of Phase Transitions of the KTa_0.63Nb_0.37O₃ Crystal