| HUANG Fen-chao,JIAO Jian,CHENG Hao,WANG Jin,WANG Jia.Effect of TiO2 on the Hardness of Hollow Silica Antireflection Coating[J],50(4):191-197 |
| Effect of TiO2 on the Hardness of Hollow Silica Antireflection Coating |
| Received:March 23, 2020 Revised:May 26, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.04.018 |
| KeyWord:AR coatings sol-gel hollow SiO2 nano-TiO2 hardness transmittance |
| Author | Institution |
| HUANG Fen-chao |
Xi’an ChaoMa Technology Co., Ltd, Xi’an , China |
| JIAO Jian |
Northwestern Polytechnical University, Xi’an , China |
| CHENG Hao |
Xi’an ChaoMa Technology Co., Ltd, Xi’an , China |
| WANG Jin |
Northwestern Polytechnical University, Xi’an , China |
| WANG Jia |
Northwestern Polytechnical University, Xi’an , China |
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| Abstract: |
| The purpose is to improve the hardness of hollow silica antireflection (AR) coatings. In this paper, a colloidal solution of hollow silica nanospheres (HSNs) is prepared by sol-gel method, and HNSs@TiO2 colloidal solution is prepared by depositing nano-TiO2 on the surface of HSNs through hydrolysis and condensation of titanium isopropoxide (TTIP). The HSNs@TiO2/ACSS AR solution is prepared by mixed the HSNs@TiO2 colloidal solution and acidic silica sol (ACSS). The morphology of HSNs and HSNs@TiO2 nanoparticles are analyzed by ultra-high resolution field emission scanning electron microscope, high-resolution transmission electron microscope and atomic force microscope. The transmittance, hardness and elastic modulus of HSNs/ACSS AR coating and HSNs@TiO2/ACSS AR coating are analyzed by UV-visible spectrophotometer and nanoindenter respectively. After the nano-TiO2 is deposited on the surface of HSNs, the particle size of the HSNs@TiO2 nanoparticles in antireflection liquid increased by 1~30 nm compared with the particle size of the HSNs; Particles and clusters on the surface of AR coating that prepared by HSNs@TiO2/ACSS AR liquid are obvious, and the surface roughness (RMS) of the AR coating could reach 9.61 nm, which is much higher than 3.62 nm of HSNs/ACSS AR coating; HSNs@TiO2/ACSS AR coating with larger HSNs@TiO2 nanoparticles increased the transmittance of glass at 550 nm by 1.3%, which is lower than 2.8% of HSNs/ACSS AR coating; Before the nano-TiO2 deposited, the hardness and elastic modulus of the HSNS/ACSS AR coating are 2.3 GPa and 56.3 GPa, respectively, the hardness of the AR coating is significantly improved after the nano-TiO2 deposited, the hardness and elastic modulus of the HSNs@TiO2/ACSS AR coating are 3.3 GPa and 55.2 GPa, respectively. The nano-TiO2 deposited on HSNs by sol-gel method could effectively improve the hardness of AR coatings, so the environmental applicability of AR coatings is expected to be further improved. |
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