Preparation and Characterization of Quantum Paraelectric La1/2Na1/2TiO3Nanocrystals

Abstract

Abstract: Quantum paraelectric La_1/2Na_1/2TiO₃nanocrystals have successfully been prepared by using improved sol-gel method in which absolute alcohol and stearic acid were used as the solvent. X-ray diffraction results show that the as-prepared sample is a pure La_1/2Na_1/2TiO₃with an acubic perovskite-type structure. The mean crystallite sizes were controlled by varying annealing temperatures. FTIR and Raman measurements reveal nano-size effects on the vibration spectroscopic properties of the nanocrystalline La_1/2Na_1/2TiO₃.

Key words: La_1/2Na_1/2TiO₃, Nanocrystal, Sol-gel method, Lattice vibration spectroscopy

CLC Number:

O611.4

TrendMD:

ZHANG Wei-Feng, ZHANG Xing-Tang, GUO Hong, FANG Jiang-Lin, ZHANG Ming-Sheng . Preparation and Characterization of Quantum Paraelectric La_1/2Na_1/2TiO₃Nanocrystals[J]. Chem. J. Chinese Universities, 1999, 20(4): 515.

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Preparation and Characterization of Quantum Paraelectric La_1/2Na_1/2TiO₃Nanocrystals

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