Changes of thickness and refractive index of silica sol-gel film by dip coating process

2014 ◽  
Vol 26 (7) ◽  
pp. 72005
Author(s):  
张日东 Zhang Ridong ◽  
严鸿维 Yan Hongwei ◽  
吕海兵 Lü Haibing ◽  
张尽力 Zhang Jinli ◽  
晏良宏 Yan Lianghong ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
Dip Coating ◽  
Silica Sol ◽  
Coating Process ◽  
Gel Film

The Influencing Factors for the Thickness of Silica Sol-Gel Film by the Dip Coating Process

2014 ◽  
Vol 597 ◽  
pp. 165-169
Author(s):  
Jie Hong Lei ◽  
Ri Dong Zhang
Keyword(s):  
Thin Films ◽  
Surface Roughness ◽  
Refractive Index ◽  
Sol Gel ◽  
Dip Coating ◽  
Silica Sol ◽  
Coating Process ◽  
Power Functions ◽  
Withdrawal Speed ◽  
Gel Film

The porous sol-gel silica thin films were prepared on silicon substrate by the dip coating process. The surface roughness and microstructure of the film was measured by optical microscopy and AFM .Coating thickness and refractive index were measured by ellipsometry method. Influence of withdrawal speed and concentration of colloid was investigated for the thickness of silica. The relation of the thickness and withdrawal speed was fitted by the linear and power functions, and the results were analyzed and compared. It was found that the films with the same thickness prepared by different concentrations of colloid have different refractive indexes. The experimental results indicated that the thickness and refractive index of the film can be controlled by changing the withdrawal speed and colloid concentration.

scholarly journals Silica Sol-gel Coatings with Improved Light Transmittance and Stability

2017 ◽  
Author(s):  
Lenke Kócs ◽  
Emőke Albert ◽  
Borbála Tegze ◽  
Márta Kabai-Faix ◽  
Csaba Major ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
Temporal Stability ◽  
Storage Period ◽  
Dip Coating ◽  
Silica Sol ◽  
Model Systems ◽  
Light Transmittance ◽  
Silica Coatings ◽  
Glass Substrates

Silica sol-gel coatings on different substrate materials and their use as model systems have been studied. Mesoporous silica coatings with thicknesses of 85 - 135 nm and porosity of 18 ˗ 37% were prepared by dip-coating on polycarbonate and glass substrates. In order to eliminate the shrinkage of the porous structure acid or base vapour treatment was applied. Thickness and refractive index of the coatings were determined by analysing the transmittance spectra of the samples. Ellipsometric porosimetry measurements were carried out to determine the porosity, pore radius distribution, thickness and refractive index. The thickness of the samples was further confirmed by scanning electron microscopy. The adsorption capacity of the porous coatings was also studied by dye impregnation tests. The temporal stability of the samples was investigated by UV-Vis spectrometry and it was found that the advantageous optical properties (Tmax = 98 – 99%) of the samples remained constant even after a 1 year storage period.

Crystallization and Photoactivity of Tio2Films Formed on Soda Lime Glass by a Sol-Gel Dip-Coating Process

2005 ◽  
Vol 192 (3) ◽  
pp. 327-335 ◽  
Author(s):  
Seung Hun Oh ◽  
Jae Seong Kim ◽  
Jin Suk Chung ◽  
Eui Jung Kim ◽  
Sung Hong Hahn
Keyword(s):  
Sol Gel ◽  
Soda Lime ◽  
Dip Coating ◽  
Soda Lime Glass ◽  
Coating Process

scholarly journals Mode Sensitivity Exploration of Silica–Titania Waveguide for Refractive Index Sensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7452
Author(s):  
Muhammad A. Butt ◽  
Andrzej Kaźmierczak ◽  
Cuma Tyszkiewicz ◽  
Paweł Karasiński ◽  
Ryszard Piramidowicz
Keyword(s):  
Refractive Index ◽  
High Performance ◽  
Near Infrared ◽  
Sol Gel ◽  
Cost Effective ◽  
Dip Coating ◽  
Infrared Wavelength ◽  
Refractive Index Sensing ◽  
Sensing Applications ◽  
Coating Method

In this paper, a novel and cost-effective photonic platform based on silica–titania material is discussed. The silica–titania thin films were grown utilizing the sol–gel dip-coating method and characterized with the help of the prism-insertion technique. Afterwards, the mode sensitivity analysis of the silica–titania ridge waveguide is investigated via the finite element method. Silica–titania waveguide systems are highly attractive due to their ease of development, low fabrication cost, low propagation losses and operation in both visible and near-infrared wavelength ranges. Finally, a ring resonator (RR) sensor device was modelled for refractive index sensing applications, offering a sensitivity of 230 nm/RIU, a figure of merit (FOM) of 418.2 RIU−1, and Q-factor of 2247.5 at the improved geometric parameters. We believe that the abovementioned integrated photonics platform is highly suitable for high-performance and economically reasonable optical sensing devices.

Refractive index measurement of pure and Er3+-doped ZrO2–SiO2 sol–gel film by using the Brewster angle technique

2002 ◽  
Vol 19 (2) ◽  
pp. 275-281 ◽  
Author(s):  
D. Luna-Moreno ◽  
E. De la Rosa-Cruz ◽  
F.J. Cuevas ◽  
L.E. Regalado ◽  
P. Salas ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
Brewster Angle ◽  
Refractive Index Measurement ◽  
Index Measurement ◽  
Gel Film

Crack Filling of Cover Glasses by Sol-Gel Coatings

2013 ◽  
Vol 797 ◽  
pp. 700-705 ◽  
Author(s):  
Kung Jeng Ma ◽  
Hsi Hsin Chien ◽  
Su Wei Huang ◽  
Shi Chang Chen ◽  
Choung Lii Chao
Keyword(s):  
Sol Gel ◽  
Smart Phone ◽  
Processing Parameters ◽  
Silica Sol ◽  
Coating Process ◽  
Cover Glass ◽  
Roll Coating ◽  
High Penetration ◽  
Glass Plates ◽  
Resistant Layer

Strengthening of glass sheets through the process of ion exchange have been widely used in thinner cover glass for smart phone. The compressive stress improves the ability of the glass surface to withstand damage from mechanical impact. However, the presence of the damage resistant layer makes conventional mechanical and laser cutting of the ion-exchanged glass difficult. Normally, the cutting process will lead to spontaneous glass sheet breakage or shattering. Even successful in some samples, the underlying central tension is exposed on the edge, and the mechanical strength and durability of this edge is degraded. The repair of edge cracks becomes an extremely important issue for the development of single glass based smart phone. The ion exchanged glass plates (Corning IOX-FS) with a thickness of 0.7 mm were selected as the substrate materials. After cutting ion exchanged glass by high penetration diamond scribing wheels, the edge of glass plates can be protected or strengthened with silica sol using roll coating process. It was observed that the strength could be improved achieving 210 % compared to the strength of uncoated glass sheets. The sol-gel coating could improve the strength of the glass mainly by the mechanisms of filling in edge flaws or blunting crack tips. The effects of silica sol and processing parameters of roll coating process on the cracks filling effects were investigated.

scholarly journals Photostability and Durability Properties of Photochromic Organosilica Coating on Fabric

2014 ◽  
Vol 9 (3) ◽  
pp. 155892501400900 ◽  
Author(s):  
Marzieh Parhizkar ◽  
Yan Zhao ◽  
Xunagi Wang ◽  
Tong Lin
Keyword(s):  
Coating Layer ◽  
Sol Gel ◽  
Dip Coating ◽  
Silica Sol ◽  
Silica Layer ◽  
Durability Properties ◽  
Coated Fabric ◽  
Coating Method ◽  
Hydrophobic Treatment ◽  
Dip Coating Method

Photochromic fabrics were prepared by a dip-coating method using a silica sol-gel solution containing photochromic dyes. The coated fabric showed a rapid photochromic response. Three methods; incorporating a UV stabilizer in the coating layer, hydrophobic treatment of the porous surface, and covering the coating layer with an additional silica layer; were used to improve the photostability and durability. All three treatments improved the photostability without noticeably changing the photochromic response/fading speeds. Most of the treatments reduced the washing and abrasion durability. The extra coating layer increased the fabric rigidity.

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