Preparation of hard optical coatings based on an organic/inorganic composite by sol-gel method

被引：30
|
作者：
Que, WX [1 ]
Sun, Z [1 ]
Zhou, Y [1 ]
Lam, YL [1 ]
Cheng, SD [1 ]
Chan, YC [1 ]
Kam, CH [1 ]
机构：
[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
来源：
MATERIALS LETTERS | 2000年 / 42卷 / 05期
关键词：
sol-gel method; organically modified silane; optical coatings; hardness; Raman spectroscopy;
D O I：
10.1016/S0167-577X(99)00207-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hard optical coating films based on SiO2/TiO2/organically modified silane (ORMOSIL) were obtained by the sol-gel technique. Tetraethoxysilane [TEOS, Si(OC2H5)(4)], gamma-Glycidoxypropyltrimethoxysilane [GLYMO, (CH2OCH)CH2O-(CH2)(3)Si(OCH3)(3)], and tetrapropylorthotitanate [TIP, Ti(O-i-C3H7)(4)] were used as precursors for the SiO2/TiO2/ORMOSIL coatings. The hardness and Young's modulus of the coatings were characterized and found to depend on the heat-treatment temperature. Hardness as high as 10 GPa was achieved at a heat-treatment temperature of 1000 degrees C for 20 min. Thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), and Raman spectroscopy were also used to investigate the structural properties of the coating. It is proposed that the high hardness of the coating film is related to the carbon and titanium content in the film. (C) 2000 Elsevier Science B.V. All rights reserved.
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页码：326 / 330
页数：5
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