摘要:
Provided is a method for coating a building material having an anti-staining function due to excellent hydrophilicity, and various functions relating to environment, such as mildewproofing, deodorization, antibacterial properties and air purification The method for coating a building material includes applying, to the surface of the building material, a coating material containing a hydrophilic polymer selected from methyl silicate, water glass, colloidal silica, poly(meth)acrylic acid, polytetrafluoroethylene obtained by graft polymerization of sulfonic acid, and mixtures of two or more thereof, and a photocatalyst selected from a titania sol, titanium oxide surface-coated with zeolite, titanium oxide surface-coated with silica, titanium oxide surface-coated with apatite, and mixtures of two or more thereof; and drying the coating material to form a photocatalyst-containing coating films.
摘要:
An article (200) for use in aggressive environments is presented. In one embodiment, the article (200) comprises a substrate (202) and a self-sealing and substantially hermetic sealing layer (210) disposed over a bondcoat (204). The substrate (202) may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such an article is also presented. The method comprises providing a substrate (202); disposing a self-sealing layer (210) over the substrate (202); and heating the sealing layer (210) to a sealing temperature at which at least a portion of the sealing layer (210) will flow.
摘要:
The present invention relates to a ceramic filter comprising clay and a process for preparing the same. More specifically, the present invention relates to the ceramic filter, including wave- shaped ceramic paper and plate-shaped paper, having improved efficiency and performance that may optimize the process of coating and calcining inorganic binder by forming an outer wall thereon, using clay, and thus increase insulation effect and mechanical strength represented by the clay layer, and the process for preparing thereof.
摘要:
The invention concerns an environmental barrier formed on a substrate (10) made of composite material with ceramic matrix and comprising an outer anti-corrosion protective layer (12) containing a compound of the alkaline, alkaline-earth or rare earth aluminosilicate. Between the substrate (10) and the protective layer (12) an adhesion sublayer (14) is formed, the composition of which develops from substantially pure silicon into substantially pure mullite between an inner surface on the substrate side, and an outer surface, decreasing in silicon content and increasing in mullite content.
摘要:
A ceramic honeycomb structure comprising a ceramic honeycomb body comprising axial grooves on its periphery, and cell walls constituting a larger number of flow paths inside the grooves, and a peripheral wall layer covering the grooves, wherein there are stress release portions at least partially in the peripheral wall layer and/or between the peripheral wall layer and the grooves. The thermal expansion coefficient of the peripheral wall layer is preferably smaller than those of the cell walls in a radial direction. The peripheral wall layer is preferably formed on the ceramic honeycomb body formed by removing a peripheral wall from a ceramic green body, before or after sintering the ceramic honeycomb body.
摘要:
A protective barrier coating system including a diffusion barrier coating and an oxidation barrier coating for use in protecting silicon-based ceramic turbine engine components. The barrier coating system includes a thermal barrier coating of stabilized zirconia and an environmental barrier coating of an alloyed tantalum oxideor a mixture of scandium disilicate, scandium monosilicate and scandium oxide. The oxidation barrier coating includes a layer of scandium disilicate for med on a substrate of silicon nitride or silicon carbide to be protected. The oxidation barrier coating may also include an inner layer of Si2ON2 between the diffusion barrier and the scandium disilicate layer. The diffusion barrier layer can consist of essentially pure Si3N4 and prevents the migration of damaging cations from the protective layers to the substrate.
摘要:
The present invention provides a honeycomb structure in which a coating layer is firmly secured to an outer wall forming a cell structure so that separation of the coating layer is effectively prevented. A honeycomb structure according to the present invention includes a cell structure having a porous partition wall partitioning a plurality of cells serving as fluid channels and an outer wall integrally formed with the partition wall, and a coating layer disposed on the surface of the outer wall forming the cell structure, a depression/protrusion portion and/or a cut portion formed by partially removing the surface of the outer wall being formed on the surface of the outer wall, and the coating layer being disposed to cover the surface of the outer wall.
摘要:
A ceramic honeycomb structure comprising a ceramic honeycomb body comprising axial grooves on its periphery, and cell walls constituting a larger number of flow paths inside the grooves, and a peripheral wall layer covering the grooves, wherein there are stress release portions at least partially in the peripheral wall layer and/or between the peripheral wall layer and the grooves. The thermal expansion coefficient of the peripheral wall layer is preferably smaller than those of the cell walls in a radial direction. The peripheral wall layer is preferably formed on the ceramic honeycomb body formed by removing a peripheral wall from a ceramic green body, before or after sintering the ceramic honeycomb body.
摘要:
A method for depositing a protective coating on a complex shaped substrate includes the steps of: (1) dipping a complex shaped substrate into a slurry to form a base coat thereon, the slurry comprising an aqueous solution, at least one refractory metal oxide, and at least one transient fluid additive present in an amount of about 0.1 percent to 10 percent by weight of the slurry; (2) curing the dipped substrate; (3) dipping the substrate into a precursor solution to form a top barrier coat thereon; and (4) heat treating the dipped, cured substrate to form a protective coating.