Title :
Structure and optical properties of PbTiO3-SiO2 nano-composites through sol-gel technique
Author :
Zhou, Qifa ; Zhang, Jinxiu ; Zhang, Liangying ; Yao, Xi
Author_Institution :
Dept. of Phys., Zhongshan Univ., Guangzhou, China
Abstract :
Transparent glass with a composition of PbO-TiO2-SiO 2 have been prepared by hydrolysis and polycondensation of mixed metal alkoxides in solutions containing Pb(Ac)23H2 O, Ti(OC4H9)4, Si(OC2H 5)4, C4H10O2 and C5H8O2. The crystallization behaviour in the gels were analyzed by differential thermal and thermogravimetric analyses (DTA-TG), X-ray diffraction (XRD) and infrared spectroscopy (IR) in detail, the linear refractive index was measured by ellipsometer, the refractive index at 632.8 nm was as high as 1.885, the optical energy band gap was estimated as 2.35 eV from the UV-optical absorption spectrum. The third-order nonlinear optical susceptibility (χ(3)) was determined by the degenerate four-wave mixing (DFWM) method, the χ(3) value was as high as 6.63×10-11 esu. It was shown that the materials exhibit large third-order susceptibility
Keywords :
X-ray diffraction; composite materials; crystallisation; energy gap; glass; infrared spectra; lead compounds; multiwave mixing; nanostructured materials; nonlinear optical susceptibility; optical constants; refractive index; silicon compounds; sol-gel processing; thermal analysis; ultraviolet spectra; 632.8 nm; PbTiO3-SiO2; PbTiO3-SiO2 nano-composites; UV-optical absorption spectrum; X-ray diffraction; crystallization behaviour; degenerate four-wave mixing; differential thermal analysis; hydrolysis; infrared spectroscopy; mixed metal alkoxides; optical energy band gap; optical properties; polycondensation; refractive index; sol-gel technique; structure; thermogravimetric analysis; third-order nonlinear optical susceptibility; transparent glass; Crystallization; Glass; Nonlinear optics; Optical diffraction; Optical mixing; Optical refraction; Optical variables control; Refractive index; X-ray diffraction; X-ray scattering;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522391
