853 results about "Polysilazane" patented technology

A multilayered material is provided which includes a substrate and a silicon-containing film formed on the substrate, wherein the silicon-containing film has a nitrogen-rich area including silicon atoms and nitrogen atoms, or silicon atoms, nitrogen atoms, and an oxygen atoms and the nitrogen-rich area is formed by irradiating a polysilazane film formed on the substrate with an energy beam in an atmosphere not substantially including oxygen or water vapor and denaturing at least a part of the polysilazane film. A method of producing the multilayered material is also provided.

Process for the fabrication of porous bodies mainly constituted by SiC containing ceramic with a microstructure which is interfused with micro-channels which consists of the process steps a) Provision of a pre-body made from cellulose or pulp b) Fabrication of an infiltration solution or a slurry consisting of (A) solvent, polysilazane, polysilane and/or polycarbosilane or (B) solvent, polysilazane and/or polysilane as well as active metallic fillers and/or passive ceramic fillers. c) Infiltrating the body with infiltration solution or slurry d) Cross-linking of the polysilazane, polycarbosilane and/or polysilane while generating a solid green body e) Ceramization through pyrolysis of the green body in an inert-gas atmosphere. f) Removal of residual carbon with an oxidizing thermal process, thereof producible catalyst carriers or carbon particulate filters as well as Porous ceramic which is made from at least 80% SiC in which the porous ceramic features a microstructure with micro-channels consisting mainly of SiC coated micro-channels featuring an average diameter between 1 and 25 μm and webs of SiC located between the micro-channels as well as additional ceramic materials with a content below 20 wt %.

A method of forming a silicon oxide layer is described. The method first deposits a silicon-nitrogen-and-hydrogen containing (polysilazane) film by radical-component chemical vapor deposition (CVD). The silicon-nitrogen-and-hydrogen containing film is formed by combining a radical precursor (excited in a remote plasma) with m unexcited carbon-free silicon precursor. A capping layer is formed over the silicon-nitrogen-and-hydrogen-containing film to avoid time-evolution of underlying film properties prior to conversion into silicon oxide. The capping layer is formed by combining a radical oxygen precursor (excited in a remote plasma) with an unexcited silicon-and-carbon-containing-precursor. The films are converted to silicon oxide by exposure to oxygen-containing environments. The two films may be deposited within the same substrate processing chamber and may be deposited without breaking vacuum.

Semiconductor devices, structures and systems that utilize a polysilazane-based silicon oxide layer or fill, and methods of making the oxide layer are disclosed. In one embodiment, a polysilazane solution is deposited on a substrate and processed with ozone in a wet oxidation at low temperature to chemically modify the polysilazane material to a silicon oxide layer.

A coating solution comprising 0.1 to 35% by weight of an inorganic or organic polysilazane having repeating units represented by the general formula below and soluble in a solvent and 0.1 to 10% by weight of catalyst such as 4,4′-trimethylenebis(1-methylpiperidine) based on a pure polysilazane content. By applying the coating solution onto the surface of base materials such as metals, plastics, glass, ceramic, wood, cement, mortar, bricks, etc., a silica coating strongly adhered to the base materials can be formed excellent in corrosion resistance and anti-scratch properties and simultaneously excellent in characteristics such as abrasion resistant, long-lasting anti-fouling properties, wetting properties to water, sealing properties, chemical resistance, oxidation resistance, physical barrier effect, heat resistance, fire resistance and antistatic properties.

The invention aims to provide a light emitting device comprising a base material or protective member which has improved light transmittance, heat resistance, passivation (gas barrier, oligomer release prevention and minimized outgassing), anti-water or moisture-absorption, stability against chemical degradation, dimensional and shape stability, anti-surface-reflection, electrical insulation, UV degradation resistance, and weather resistance, and is highly productive due to possible film formation under atmospheric pressure, and hence, a light emitting device featuring high reliability, ease of manufacture and low cost. The object is attained by a light emitting device comprising a base material (1) having flexibility, light transparency and heat resistance, a lower electrode (4) having light transmittance, a light emitting layer (4), and an upper electrode (4) formed on the base material, the device further comprising a silica film and/or a siliceous film (3) which is formed on the substrate side as viewed from the light emitting layer (4) or on opposite sides of the substrate by applying polysilazane and subjecting it to oxidative treatment.

The invention discloses an organic polysilazane/inorganic nano-material super-hydrophobic coating and a preparation method thereof. According to the preparation method, firstly, an organic polysilazane solution is prepared, a silane coupling agent containing hydrophobic units is used for carrying out hydrophobization on an inorganic nano-material, and dispersion liquid of the hydrophobic inorganic nano-material is prepared; then, an organic material or an inorganic material or a metal material serves as a base material, and an organic polysilazane and the hydrophobic inorganic nano-material alternatively deposit on the surface of the base material in sequence through a deposition method; finally, appropriate heat treatment is carried out on the surface which is subjected to multiple times of alternative deposition. The obtained coating shows good super-hydrophobic performance, the contact angles of water drops on the surface of the coating are larger than 150 degrees, the rolling angles are smaller than 10 degrees, and the coating has good mechanical and chemical stability and has wide application prospect in the field of waterproof clothes, exterior wall coating, oil-water separation, biomedicine and the like. According to the method, the preparation process is simple, and large hydrophobic coatings can be established on various base material surfaces.

This invention relates to an amorphous non-glassy ceramic composition that may be prepared by curing, calcining and/or pyrolyzing a precursor material comprising silicon, a Group III metal, a Group IVA metal, and/or a Group IVB metal.

The invention provides an UV curing coating, a wear-resistant and antifouling coating layer and a mobile phone protection film containing the wear-resistant and antifouling coating layer. The coating comprises, in parts by weight, 10-95 parts of a first prepolymer, 5-60 parts of a second prepolymer, 0.05-8 parts of a polysilazane-based polymer, 0.05-8 parts of a fluorine-containing aid, 1-15 parts of a photoinitiator and 100-300 parts of a solvent, wherein the first prepolymer is a urethane acrylate prepolymer with a functionality degree of 4-8; the second prepolymer is an acrylate prepolymer with a functionality degree of 9-18. The wear resistance of the coating layer formed after curing the UV curing coating can be improved by the first prepolymer and the second prepolymer with high functionality degrees, improvement for the wear resistance of the coating layer and prolonging for the service life of the coating layer are benefited due to the adding of the polysilazane-based polymer and a polar compound, and the good antifouling performance of the coating layer can be ensured, and the reduction of the antifouling performance of the coating layer can be suppressed due to the fluorine-containing aid. The coating layer has both good antifouling performance and wear resistance.

A method for modifying the surface of a substrate includes the following steps: (1) a step for forming a polysilazane coating by applying a polysilazane onto the surface of a substrate; (2) a step for applying an organic compound of which main backbone comprises an organic group represented by the following formula [1]: —[(R)_mO]_n— (wherein R represents an alkylene group, and m and n respectively represent a positive number of not less than 1) onto the surface of the polysilazane coating; and (3) a step for heating the substrate having undergone the steps (1) and (2), thereby converting the polysilazane to silica and bonding the organic compound to the silica of the silica layer.

By applying the solution comprising 0.5 to 10 % by weight of an inorganic polysilazane having repeating units represented by the general formula below and soluble in a solvent and a catalyst such as 4,4'-trimethylenebis (1-methylpiperidine) etc. onto the surfaces of the bodies and wheels of automobiles, dentures, tombstones, the interior and exterior of a house, products used with water in toilets, kitchens, washrooms, bathtubs, etc., signboards, signs, plastic products, glass products, etc., a rigid and dense silica coating is formed to confer a long-durable hydrophilic effect and anti-fouling effect on the surfaces. The solvent is properly selected from mineral spirit, paraffin type solvents, aromatic solvents, alicyclic solvents and mixture thereof depending on the article being coated.

Disclosed herein is a protective film. The protective film is produced by alternate coating of a polysilazane-based polymer and a flexible polysiloxane-based polymer. The polysilazane-based polymer is cured at low temperature to form silica, thereby achieving high hardness and high light transmittance. The protective film has improved interfacial adhesion between the respective coating films, which prevents permeation of moisture and oxygen. In addition, the protective film can be easily produced by low-temperature wet processes. Also disclosed herein is an encapsulation material comprising the protective film.

In one embodiment, a semiconductor component, such as a wavelength converter wafer, is described wherein the wavelength converter is bonded to an adjacent inorganic component with a cured bonding layer comprising polysilazane polymer. The wavelength converter may be a multilayer semiconductor wavelength converter or an inorganic matrix comprising embedded phosphor particles. In another embodiment, the semiconductor component is a pump LED component bonded to an adjacent component with a cured bonding layer comprising polysilazane polymer. The adjacent component may the described wavelength converter(s) or another component comprised of inorganic material(s) such as a lens or a prism. Also described are methods of making semiconductor components such as wavelength converters and LED's.

The present invention provides a preparation method of SiBN(C) ceramic fiber. In the preparation method, silicon haloganide, boron halide and disilazane of small molecules are used as starting materials and are mixed according to a certain ratio; the temperature is raised to be between 150 and 500 DEG C and is maintained for a certain period; after the temperature is lowered, the mixture is processed through vacuum distillation and is cooled to be at the room temperature; thus the precursory of solid boron-containing polysilazane can be prepared and is then used for fusing filature to prepare precursor fiber of SiBN(C) ceramic fiber. Compared with the existing method, the preparation method has the advantages of low costs in raw materials, reliable source, higher synthetic yield, simple process and one-step preparation of the precursor; the fiber of the precursor is treated through chemical crosslinking that has high efficiency and is conducive to the integrative operation of spinning, non-melting treatment and sintering.

A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated to obtain the finished SiC fiber. The manufacturing process for the production of the fine SiC ceramic fiber allows for flexibility with respect to cross-linking, in that low-cost thermal treatments may replace more complex methods, while obtaining fibers with improved materials properties as compared to currently available SiC fibers.

An optical information medium has a light-transparent substrate and an information recording layer, wherein optical recording and/or reading is performed with a laser beam that enters the information recording layer from the light-transparent substrate side. A cured polysilazane film is disposed on the laser beam incident side of the light-transparent substrate, and the light-transparent substrate or the light-transparent substrate having the cured polysilazane film integrated thereon has a tensile modulus of at least 200 MPa. The medium on its laser beam incident side surface is improved in mar resistance.