ゾル-ゲル法で作製した凹凸形状を有するSiO<sub>2</sub>薄膜の膜硬度に及ぼすTiO<sub>2</sub>添加効果と自動車用はっ水ガラスへの応用

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  • Effect of the Addition of TiO2 to SiO2 Films with Concave-Convex Surface Derived by the Sol-Gel Method on Film Hardness and Application to Water-Repellent Glasses for Automotive Windows.

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Silica-titania films with a concave-convex surface were prepared from a mixture of polymerized tetraethoxysilane (TEOS) sol containing tetraisopropoxytitanate and polymerized methyltriethoxysilane (MTES) sol in a molar ratio MTES/TEOS of 6. Film hardness was dependent on the composition of the coating sol, heat treatment temperature and time. The film obtained by introduction of 4mol% TiO2 to SiO2 and by heat treatment at 620°C for 10min was hard to be usable in engineering practice. New-type water-repellent glasses were produced y using these SiO2-TiO2 films as an under layer combined with fluoroalkylsilane; the glasses showed an abrasion resistance for practical application as automotive windows.

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