Optical characteristics of porous glasses matrix and its light-conducted mechanism

Abstract

The optical properties of matrix of porous glasses and phase-separated glasses were investigated by visible spectroscopy and infrared spectroscopy. The experimental results show that, both the porous glasses and phase-separated glasses have very good light transmission in visible light region that wavelenth is longer than 560 nm. The micropores of porous glasses and the boron-rich phase of phase-separated glasses have strong Rayleigh scatter effects on the visible light, the largest scatter occurrs at 360–370 nm; the thicker the glasses, the larger the light scattering. Thus, the pare size distribution and the size of heterogeneous micro zone in boron-rich phase of phase-separated glasses can be measured. After coupled into porours glasses, the most intense absorption of hydrated ions of [Co(H₂O)₆]²⁺ shifts from 508nm to 515nm. The production of the most intense absorption and the red shift were owed to Jahn-Teller effect of octahedral field formed by six H₂O molecular and perturbation effect resulted by microporous of porous glasses for its physics-chemical circumstance. As a result, the porous glasses are perfect optical function materials in visible region, which can be assembled by chemical method.

Keywords

porous glasses / phase separation / photoelectric materials / matrix

References

[1] Zha Conji, Atkins G R, Masters A F. Preparation and Spectroscopy of Anhydrous Borosilicate Sols and Their Application to Thin Films. Journal of Non-Crystalline Solids, 1998, 242: 63-67.

[2] Lin Jie, Brown Chris W. Sol-gel Glasses as a Matrix for Chemical and Biochemical Sensing. Trends in Analytical Chemistry, 1997, 16(4): 200-211.

[3] Rakow Neal A, Susrick Kenneth S. A Colorimetric Sensor Array for Odour Visibleization. Nature, 2000, 406: 710-713.

[4] Jiaheng Lei, Suwen Li, . Stress Analysis During Making Porous Glasses. Journal of Wuhan University of Technology-Mater. Sci. Ed., 1997, 19(1): 28-30.

[5] Drexhage M G, Gupta P K. Strengthening of Glasses by Partial Leaching. J. Am. Ceram. Soc., 1980, 63(1–2): 72-77.

[6] Jiaheng Lei, Qihua Yuan, Dabing Luo. Fabrication and Characteristic of Porous Glasses Optic Matrix. Journal of Gongneng Cailiao, 1999, 30(4): 416-417.

[7] Hakte E, Zais A. Optics, 1980 Beijing: People Education Press. 459-459.

[8] Yazawa Tetsuo, Kuraoka Koji, Akai Tomoko. Clarification of Phase Separation Mechanism of Sodium Borosilicate Glasses in Early Stage by Nuclear Magntic Resonance. J. Phys. Chem. B, 2000, 104: 2109-2116.

[9] Zhifeng Cao. Special Optics Glasses, 1993 Beijing: Enginery Industry Press. 65-65.

[10] Nakanshi Koji, Solomon P H. Infrared Adsorption Spectroscopy, 1977, 21: 44-44.

[11] Gaoyang Xie. Inorganic Chemistry Series, 1996 Beijing: Sceince Press. 298-298.

[12] Bates T. Ligand Theory of Transition Metal Ions in Glasses. Vitreous State, 1962, 2: 245-246.