Synthesis and optical properties of tetragonal KTa0.6Nb0.4O3 nanoparticles |
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| Authors: | Zheng Keyu Zhang Duanming Zhong Zhicheng Xiangyun Han |
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| Institution: | a School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
b Faculty of Materials Science & Engineering and Hubei Key Laboratory of Ferroelectric and Piezoelectric Materials and Devices, Hubei University, Wuhan 430062, China |
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| Abstract: | Tetragonal phase KTa0.6Nb0.4O3 (KTN) nanoparticles have been prepared by hydrothermal method. The obtained particles were characterized by X-ray powder diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy and UV-vis absorption spectrum techniques. A systematic change in crystal structure from cubic to tetragonal is observed with the increase of reaction temperature and KOH concentration. Room temperature UV-vis absorption spectrums of KTN particles show that the band gap changes from 3.24 to 3.34 eV with grain size diminished, which reveals the existence of blue-shift phenomenon of absorption bands. |
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| Keywords: | 73 63 Bd 78 67Bf |
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