36results about How to "Improve aging stability performance" patented technology

A catalyst and a process for selective catalytic reduction of nitrogen oxides in diesel engine exhaust gases with ammonia or a compound decomposable to ammonia are described. The exhaust gas to be cleaned is passed together with ammonia or a compound decomposable to ammonia over a catalyst which comprises a zeolite or a zeolite-like compound containing 1-10% by weight of copper, based on the total weight of the zeolite or of the zeolite-like compound, and a homogeneous cerium-zirconium mixed oxide and / or a cerium oxide. The zeolite used or the zeolite-like compound used is selected from the group consisting of chabazite, SAPO-34, ALPO-34 and zeolite-β.

A pencil-type glow plug for a self-igniting internal combustion engine is described. The pencil-type glow plug includes a plug body in which a combustion chamber pressure sensor is integrated, and a bar-shaped heating element that protrudes out from the plug body at one end, into the combustion chamber of the internal combustion engine. A force-measuring element of the combustion chamber pressure sensor is accommodated behind the heating element, which moves axially under the influence of force. The force-measuring element is sealed against combustion chamber gases by a steel diaphragm made of a stainless precipitation-hardened maraging steel.

The present invention relates to a thermoplastic composition that provides improved thermal aging stability along with durability. The thermoplastic composition comprises a polyamide resin, and a polyhydric alcohol, wherein a majority of the polyhydric alcohol particles have a particle size that is less than about 70 microns. It has been found that a combination of a polyamide resin and a polyhydric alcohol with this particle size produces a superior product demonstrating greater thermal stability and durability than the polyamide resin alone.

PCT No. PCT / JP98 / 00676 Sec. 371 Date Nov. 10, 1998 Sec. 102(e) Date Nov. 10, 1998 PCT Filed Feb. 18, 1998 PCT Pub. No. WO98 / 40441 PCT Pub. Date Sep. 17, 1998Disclosed is water based ink having metallic luster adapted for a direct-filling ball-point pen, which is used by being directly filled into the tube, said ink comprising, based on the total amount of the ink composition, 1% to 20% by weight of a metallic color pigment comprising metallic powder and a color pigment adsorbed thereon, 0.1% to 1.0% by weight of a water-soluble or water-dispersible polymer agent which imparts pseudo-plasticity, and water, thereby providing ink satisfactory in beauty and luster and excellent in aging stability and writing properties.

The invention relates to a transductor regulator with a magnetic core which is made up of a nanocrystalline alloy which is almost free of magnetorestriction. The core has as low cyclic magnetization losses as possible and as rectangular a hysterisis cycle as possible. Said alloy has the composition: FeaCobCucM′dSixByM″z, M′ representing an element from the group V, Nb, Ta, Ti, Mo, W, Zr, Hf or a combination of these and M″ representing an element from the group C, P, Ge, As, Sb, In, O, N or a combination of these and the following conditions applying: a+b+c+d+x+y+z=100%, with a=100%−b−c−d−x−y−z, 0≦b≦15, 0.5≦c≦2, 0.1≦d≦6, 2≦x≦20, 2≦y≦18, 0≦z≦10 and x+y>18. The inventive transductor regulators are particularly advantageously used in motor vehicle voltage supplies, rail power supplies or in aircraft power supplies.

An object of the present invention is to provide a method for manufacturing such a dry lithographic printing master plate that has eliminated uneven plate performance and more specifically that provides a stable adhesiveness between a heat-sensitive layer and a silicone rubber layer as well as a high aging stability of a coating solution. Provided is a method for preparing a master plate useful for making a dry lithographic printing plate comprising at least a heat-sensitive layer and a silicone rubber layer which are stacked in this order on a substrate, said method comprising the steps of: (1) dissolving a diorgano-polysiloxane and a curing catalyst in a solvent; (2) dissolving a cross-linking agent in a solvent; (3) mixing the solution obtained in the step (1) with the solution obtained in the step (2); and (4) applying the mixture obtained in the step (3) over the heat-sensitive layer to thereby form the silicone rubber layer.

A photomask blank has a chemically amplified negative resist film comprising (A) a polymer comprising recurring units of specific structure and recurring units having fluorine, (B) a base resin adapted to reduce its solubility in alkaline developer under the action of acid, (C) an acid generator, and (D) a basic compound. The resist film is improved in receptivity to antistatic film.

A diesel particle filter having an oxidation catalyst comprising platinum and palladium deposited thereon is described. The conversion of hydrocarbons and carbon monoxide can be significantly improved by mixing zeolites as HC storage components into the oxidation catalyst. Furthermore, the particle filter is coated with a second catalyst which does not contain any zeolites from the inlet end to part of the length.

An optoelectronic semiconductor chip has a semiconductor body and a substrate on which the semiconductor body is disposed. The semiconductor body has an active region disposed between a first semiconductor layer of a first conductor type and a second semiconductor layer of a second conductor type. The first semiconductor layer is disposed on the side of the active region facing the substrate. The first semiconductor layer is electrically conductively connected to a first termination layer that is disposed between the substrate and the semiconductor body. An encapsulation layer is disposed between the first termination layer and the substrate and, in plan view of the semiconductor chip, projects at least in some regions over a side face which delimits the semiconductor body.

The invention provides an improved antioxidant for foods, feeds, cosmetics and pharmaceuticals, and also compositions which contain this antioxidant as preferably sole added antioxidant additive.

An actinic ray- or radiation-sensitive resin composition according to the present invention comprises a sulfonic acid-generating compound that is decomposed by an action of an acid to generate a sulfonic acid having a volume of 240 Å3 or more and a compound that generates the acid when exposed to actinic rays or radiation.

Provided is a positive resist composition for an electron beam, an X-ray or EUV, including: (A) a resin capable of decomposing by the action of an acid to increase the dissolution rate in an aqueous alkali solution; (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation, represented by the following formula (ZI) or (ZII); (C) a basic compound; and (D) an organic solvent, wherein a concentration of all solid contents in said composition is from 1.0 to 4.5 mass %, and a total amount of the compound represented by formula (ZI) or (ZII) is 12 mass % or more based on all solid contents in said composition:wherein symbols in the formulae are defined in the specification.

The invention provides a quantum-dot composition, a quantum-dot luminescent material, a preparation method therefor and a luminescent device containing the quantum-dot luminescent material. The quantum-dot composition comprises a micro emulsion and a macromolecular precursor for dispersing the micro emulsion, wherein the micro emulsion comprises quantum dots, a dissolving medium for dissolving thequantum dots and an emulsifier for wrapping the dissolving medium. Firstly, the quantum dots are dissolved in the dissolving medium, and then, the quantum dot dissolved dissolving medium is added into the macromolecular precursor. The emulsifier is amphiphilic, one end of the emulsifier is connected with the macromolecular precursor, the other end of the emulsifier is connected with the dissolving medium, the quantum dot dissolved dissolving medium can form the micro emulsion by using an emulsifying action of the emulsifier, and the contact between the quantum dots and the macromolecular precursor is effectively avoided, so that the quantum dots can be present inside the micro emulsion and are stably dispersed in the macromolecular precursor, the luminescence efficiency of the formed quantum-dot luminescent material is increased, and the aging stability of the quantum dots is improved.

The invention relates to a zinc oxide piezoresistor ceramic with high voltage gradient, low residual voltage and low leakage current and a preparation method thereof, and belongs to the technical field of piezoresistor material preparation. The method comprises the following preparation steps: mixing Bi2O3, Sb2O3, MnO2, Cr2O3, Co2O3 and SiO2, and adding deionized water for grinding; adding ZnO anddeionized water into the ground slurry, and grinding again; adding Al(NO3)3, In(NO3)3, Y(NO3)3 or Y2O3 into the ground ZnO slurry, and grinding again; tabletting and sintering the ground slurry The resistor ceramic prepared by the method has the characteristics of small leakage current, high gradient, low residual voltage, large current capacity and stable aging performance, and can better meet the application demand on overvoltage of transmission line arresters, GIS (Gas Insulated Switchgear) arresters and deeply-limited power systems.

An optical recording medium which has a substrate and, formed thereon, a recording layer containing at least two types of dye, that is, a dye A and a dye B, characterized in that the above dye A and the above dye B satisfy the following requirements (1) and (2): (1) they have a decomposition starting temperature of 150 to 250 DEG C, (2) a refractive index n(A) and an exhaustion coefficient k(A) of the dye (A) at the wave length of a laser light for recording, and a refractive index n(B) and an exhaustion coefficient k(B) of the dye (B) at the above wave length satisfy the following formulae: n(B) / n(A) > 0.7 k(B) / k(A) > 10.

Disclosed is a ceramic sintered shaped body containing Y2O3-stabilized zirconia with a sintered density of at least 99% of the theoretical sintered density and having a mean grain size of <180 nm. The zirconia fraction of the sintered shaped body comprises tetragonal and cubic phases. Also disclosed is a process for the production of a ceramic sintered shaped body containing Y2O3-stabilized zirconia, which process comprises dispersion of a submicron powder and comminution of the dispersed submicron powder by means of grinding media having a diameter of less than or equal to 100 μm to a particle size d95 of <0.42 μm; shaping of the dispersion to form a body, and sintering of the body to form the sintered shaped body.

In automotive exhaust gas catalysts with a metallic honeycomb composed of corrugated and smooth sheet layers, it is known that the heat capacity and thermal conductivity of the honeycomb can be reduced by perforations in the sheet layers. As a result, the honeycomb heats up more rapidly and the catalytic coating applied on the honeycomb reaches its operating temperature more rapidly. A disadvantage here is the reduction in the support surface area by the perforations in the sheet layers. According to the invention, suitable adjustment of the properties of the coating suspension used for the catalytic coating and of the dimensions of the holes relative to one another allows the holes to be filled permanently with catalyst material. The resulting catalyst has, at the same coating concentration as a catalyst with unperforated sheet layers, a significantly reduced heat capacity and thermal conductivity.

An optoelectronic semiconductor chip has a semiconductor body and a substrate on which the semiconductor body is disposed. The semiconductor body has an active region disposed between a first semiconductor layer of a first conductor type and a second semiconductor layer of a second conductor type. The first semiconductor layer is disposed on the side of the active region facing the substrate. The first semiconductor layer is electrically conductively connected to a first termination layer that is disposed between the substrate and the semiconductor body. An encapsulation layer is disposed between the first termination layer and the substrate and, in plan view of the semiconductor chip, projects at least in some regions over a side face which delimits the semiconductor body.

The invention belongs to the field of transparent heat insulation films, and discloses preparation and application of a degradable, transparent and high-mechanical-strength high-performance ATO heat insulation film based on natural cellulose nanofibers. Fiber raw materials are selected to prepare CNF with a small diameter (20 nm) and a large length-diameter ratio (50) and ATO with a particle sizeof 30-50 nm for blending and suction filtration; a filter cake is attached to the smooth surface of PDMS and dried to form a film, a high-transparency flexible base film is obtained, and due to the good ultraviolet band absorption and infrared band reflection performance of ATO, the composite film has an excellent heat insulation effect. And meanwhile, the nano sizes of ATO and NFC are beneficialto ensuring the high transparency of the composite film. Meanwhile, due to the hydrophilicity of the CNF, the composite film is subjected to a certain mechanical action in a common aqueous solution and is easily dispersed in water again to achieve a recyclable and degradable effect, so that a degradable, transparent and high-performance ATO heat insulation film new material with high mechanical strength is obtained.

The invention relates to the field of additives or auxiliary agents for food, fodder, cosmetics, and pharmaceuticals, especially antioxidative additives and antioxidants. The invention particularly relates to an improved antioxidant for food, fodder, cosmetics, and pharmaceuticals as well as compositions containing said antioxidant as preferably the only antioxidative additive to be added.

The present invention relates to a thermoplastic composition that provides improved thermal aging stability. The thermoplastic composition includes a polyamide resin, glass fibers, tin(II) oxalate, and a functional additive. It has been found that a combination of a polyamide resin with tin(II) oxalate and a functional additive produces a superior product demonstrating greater thermal stability than the polyamide resin alone.

The invention provides a quantum dot composition, a quantum dot light-emitting material, a preparation method thereof and a light-emitting device containing the quantum dot composition. The quantum dot composition includes microemulsions and polymer precursors of dispersed microemulsions, wherein the microemulsions include quantum dots, a dissolution medium for dissolving the quantum dots, and an emulsifier for wrapping the dissolution medium. Firstly, the quantum dots are dissolved in the dissolution medium, and then the dissolution medium in which the quantum dots are dissolved is added to the polymer precursor. Since the emulsifier is amphiphilic, one end is connected to the polymer precursor, and the other end is connected to the dissolution medium. The emulsification of the emulsifier makes the dissolution medium in which the quantum dots are dissolved form a microemulsion, which effectively avoids the quantum dots and the polymer precursor. body contact, thereby ensuring that the quantum dots exist inside the microemulsion and are stably dispersed in the polymer precursor, improving the luminous efficiency of the formed quantum dot luminescent material and the aging stability of the quantum dots.

Belonging to the field of materials, the invention discloses a method for preparation of ZnO varistor ceramic by common doping of aluminum, gallium and yttrium ions. The method includes the preparation steps of: mixing Bi2O3, Sb2O3, MnO2, Cr2O3, Co2O3 and SiO2, adding deionized water and conducting ball-milling; adding ZnO and deionized water into the ball milled slurry, and performing ball milling again; adding Al(NO3)3, Ga(NO3)3, Y(NO3)3 or Y2O3 into the ball milled ZnO slurry, and conducting ball milling again; and subjecting the ball milled slurry to tabletting sintering. The varistor ceramic prepared by the method provided by the invention has the characteristics of small leakage current, high gradient, low residual voltage, large current capacity and stable aging performance, and is more suitable for the application requirements of power transmission line lightning arrester and GIS lightning arrester, and depth limit power system overvoltage.