Papers by Keyword: Inorganic Coating

Abstract: The surface of porous nitride radome became very compact by AlPO₄-Si₃N₄-SiO₂(n) coating treatment. Coating could immerse into the matrix about 20μm deep. This could also make material be moisture resistance for long time placement. Coating effectively healed the micro cracks on the matrix and combined with it by crossed occlusion, so the strength and the fracture toughness of material increased.

Abstract: A waterborne two-package inorganic insulation coating was prepared by using silica sol and MTMS as raw materials, acetic acid as pH adjusting agent. The results showed the viscosities of paint were closely related to ambient temperature, acetic acid content and aging time. The coating on the treated aluminum alloy was obtained through spraying and curing. The coating was cured at 80 °C had high density, good physicochemical properties and higher resistance and electrical strength.

Abstract: The organic-inorganic hybrid sol was prepared using an alkaline silica sol modified by acid-catalyzed hydrolytic polycondensation of methyltrimethoxysilane (MTMS) in a water-bath condition of 60oC, and then the water-based primer and topcoat were prepared through adding the pigments and nano-TiO2 suspension respectively. Through spraying and baking, the organicinorganic composite coating on the treated aluminum alloy was obtained. The optimum range of P/B (weight ratio of the pigment/binder) is determined between 1:1 and 1.5:1 by investigating the influence of the P/B of the primer on the adhesion and impact resistance of the coating. The microstructure of the coating was characterized by optical microscopy and scanning electron microscopy. The results show that there are lots of holes and lamellar structure in the primer coating and the obtained topcoat coating is uniform, smooth and dense. The coating of ~30 μm in thickness is mainly composed of three elements of silicon, aluminum and titanium, in which transition layer of ~10 μm is included. The physicochemical properties suggest that the coatings on aluminum alloy can meet the needs of finishing coating very well.

Abstract: Formation of coatings with combined properties of being superhydrophilic / superhydrophobic is of immense applications in the field of optics. In our present work, we developed a hydrophilic, antifogging, transparent, and stable coating by employing an anionic electrolyte, Tiron and dip-coating of organic-inorganic mixture. One of the attempts was to adhere Tiron on metal oxide surface by chelating effect, and the other one was to apply an organicinorganic coating on glass or lens substrate. The latter was formulated by mixing appropriate ratios of organic silanol coupling agents and diacrylates component for strong adhesion to the substrate, and inorganic component of a hybrid mixture of silica, titania and Tiron for the antifogging behavior. The surface chemistry of the coated films was studied by taking ATR-IR measurements, and the wetting behavior was characterised by contact angle measurement