84results about How to "Avoid pores" patented technology

A flame retardant, electromagnetic interference (EMI) shielding gasket construction. The construction includes a resilient core member formed of a foamed elastomeric material, an electrically-conductive fabric member surrounding the outer surface of the core member, and a flame retardant layer coating at least a portion of the interior surface of the fabric member. The flame retardant layer is effective to afford the gasket construction with a flame class rating of V-0 under Underwriter's Laboratories (UL) Standard No. 94.

A flame retardant, electromagnetic interference (EMI) shielding gasket construction. The construction includes a resilient core member formed of a foamed elastomeric material, an electrically-conductive fabric member surrounding the outer surface of the core member, and a flame retardant layer coating at least a portion of the interior surface of the fabric member. The flame retardant layer is effective to afford the gasket construction with a flame class rating of V-0 under Underwriter's Laboratories (UL) Standard No. 94.

A lightweight portable fire resistant containment system comprises an outer shell and a lid. Free surfaces of the outer shell and lid are covered to prevent ingress of hot gas. The outer shell may have an inner shell forming an insulating air gap. Outer shell, inner shell and lid are fabricated from inorganically bonded high temperature resisting ceramic fibers. The outer surface of the inner shell has a metallic infrared reflecting wrap. An encased phase change material containment absorbs heat by melting or decomposition. A wooden or plastic lightweight portable box enclosure with cover is placed within the interior surface of the containment for storage of valuable documents, photographs and magnetic media. A jump drive within the portable box preferably houses the magnetic media. When the fire resistant containment system is exposed to 1550° F. for 30 minutes the interior of lightweight portable box enclosure remains below 125° F.

The invention provides a vacuum concrete mixing process. The vacuum concrete mixing process is characterized in that via simple structural modification, after a mixing drum of a mixer is sealed, the interior of the mixing drum is vacuumized, that is, before mixing, a certain vacuum degree is formed in the mixing drum, so that contact between freshly mixed concrete slurry and air in the mechanical mixing process is greatly reduced, formation of bubbles in concrete is reduced, and accordingly, the porosity is greatly reduced. Furthermore, the minimum pressure in the mixing drum is controlled, so that the ambient temperature is lower than the boiling point of moisture in the mixing drum, accordingly, moisture evaporation is avoided, the phenomenon that pores are formed by moisture evaporation is prevented, and the porosity is further reduced. The vacuum concrete mixing process is simple, is convenient to operate, and can efficiently improve the concrete compactness, strength and durability.

The invention discloses an anti-corrosion spraying process based on a polytetrafluoroethylene material. The anti-corrosion spraying process based on the polytetrafluoroethylene material comprises thefollowing steps that 1, the surface treatment is carried out on a rolled steel, specifically, the cleaning treatment is carried out on the surface of the rolled steel firstly, sundries and stains on the surface of the rolled steel is washed and cleaned by using pressure water of 290 Kpa, and the time length is 10-15min; then an abrasive paper is used for grinding treatment, projections on the surface of the rolled steel is polished uniformly, and the roughness of the surface of the rolled steel reaches about 20 microns; a fluorocarbon diluting agent is used to wipe the surface of the rolled steel cleanly, and exposing and airing are carried out to obtain the clean and polished rolled steel. According to the anti-corrosion spraying process based on the polytetrafluoroethylene material, through the multiple spraying step process and the anti-corrosion function of the polytetrafluoroethylene material, the adhesiveness of the coating rolled steel is improved, the coating is not prone to fall off in use, and the quality of the rolled steel is improved; and meanwhile, the combination degree among primer, finish paint and the rolled steel is improved, the gap condition is avoided in the coating, the anti-corrosion property and the wear resistance of the rolled steel are greatly improved, and a good application prospect is realized.

The invention discloses a preparation method of dense sintering type composite aluminum nitride ceramics, and belongs to the technical field of inorganic ceramic materials. The preparation method comprises the following steps: firstly uniformly mixing alcohol aluminum salt, silicate ester, fatty acid, an alcohols solvent-nano-iron powder and sodium fluoride, then adding carbon fiber / graphene oxideaerogel, and carrying out ultrasonic immersing, thus obtaining a mixed immersing solution; after heating and carrying out ultrasonic reaction on the mixed immersing solution, filtering, washing, anddrying, thus obtaining loaded filling aerogel; then reducing the loaded filling aerogel by hydrazine hydrate, thus obtaining reduced loaded filling aerogel; then carrying out temperature rising reaction on the reduced loaded filling aerogel step by step under a nitrogen protection state, thus preparing composite aluminum nitride powder; then mixing the composite aluminum nitride powder with calcium oxide, magnesium oxide, polyvinyl butyral and a solvent, molding through injection molding, then carrying out high-temperature sintering, and cooling, thus obtaining the dense sintering type composite aluminum nitride ceramics. The dense sintering type composite aluminum nitride ceramics obtained by the invention has excellent mechanical performance and excellent heat conduction efficiency.

Provided are manufacturing methods of a substrate and a wiring substrate, including a step A of forming a primary plating layer on a lower side of a glass substrate having a through-hole; a step B of sealing a lower opening of the through-hole by forming a first layer on an upper side using electroplating; and a step C of filling the through-hole by depositing a second layer in the through-hole using electroplating from the upper side. In the step A, the primary plating layer is formed on from a lower opening edge to a partial sidewall surface of the through-hole. In the step B, the lower opening is sealed by growing the first layer from a primary plating layer surface inside the through-hole. In the step C, the through-hole is filled with plating metal by growing the second layer from a first layer surface inside the through-hole toward an upper opening.

The invention relates to an organic light emission diode, which comprises a substrate, an anode layer, an organic light emission unit and a cathode layer covered with a packaging film, wherein the substrate, the anode layer, the organic light emission unit and the cathode layer are successively laminated; the organic light emission unit comprises a hole transmission layer, a light emission layer and an electron transmission layer, wherein the hole transmission layer, the light emission layer and the electron transmission layer are successively laminated on the surface of the anode layer. Since the cathode layer of the organic light emission diode adopts a lamination structure characterized in that a metal layer is doped with organic layers, the thickness of a metal film of the cathode layer is lowered, and the toughness of the metal film is improved. In addition, a plurality of organic layers are arranged, internal stress generated by the metal film in a flexure process is dispersed, the metal film is prevented from generating cracks or pores, the flexural property of the whole diode is improved, and the service life of the organic light emission diode is prolonged. In addition, the invention also provides a preparation method for the organic light emission diode.

The invention discloses a method for preparing a bismuth vanadate functional ceramic and the obtained bismuth vanadate functional ceramic. The method comprises the following steps: by adopting Bi2O3 and V2O5 as raw materials, mixing the Bi2O3 and the V2O5 powders in the molar ratio of 1 to 1 and grinding for 5 hours by adopting absolute ethyl alcohol as a solvent, volatilizing the solvent out, pressing into pieces, putting the pieces into a quartz mould, sealing the quartz mould to inhibit the volatilization of components, putting the sealed quartz mould into a muffle furnace to carry out primary firing, grinding into powder after the firing is completed, pressing into pieces again, putting the pieces into the sealed quartz mould again to carry out secondary firing, controlling the cooling rate to be not more than 3.3 DEG C / min after the firing is finished, and cooling to room temperature to obtain the bismuth vanadate functional ceramic. The obtained bismuth vanadate functional ceramic has the characteristics that the chemical component is BiVO4; the density is above 97%; the dielectric constant is 60 and the dielectric loss is less than 0.005.

The invention discloses retarder-free waterproof magnesium ammonium phosphate cement and a preparation method thereof. The cement comprises dead burned magnesia coated with graphene oxide, ammonium dihydrogen phosphate and mineral admixtures, wherein the mass ratio of dead burned magnesia coated with graphene oxide and ammonium dihydrogen phosphate is (62-78):(22-38), and the mineral admixtures are 5-15% of the total mass of dead burned magnesia and ammonium dihydrogen phosphate. According to the cement, dead burned magnesia powder is pretreated by graphene oxide, so that a comparatively obvious isolation effect is formed between magnesia and an external environment, therefore, the dissolution rate of magnesia is greatly decreased, a forming process of a hydration product is delayed, and the heat release of a whole reaction system is reduced; macroscopically, the time of coagulation is greatly prolonged, and any retarders do not need to be added. Moreover, a dissolution process of the hydration product and phosphate is inhibited, a large amount of pores are prevented from being formed in the cement, and the strength of hardened cement paste is ensured.

The invention relates to the technical field of preforming welding material, and particularly discloses a preparation technique of a nanoparticle composite material film for welding; the technique includes steps of material mixing-vacuum defoamation- curtain coating and film formation-drying and curing-after-treatment. The preparation technique is featured by simple and feasible practice, strong controllability, high efficiency, and low cost; the technique can effectively guarantee the component of the prepared nanoparticle composite material film, uniform and stable dimension, excellent processing performance and high reliability of low-temperature sintering and welding; the preparation technique can be widely applied to the field of preforming welding material.

The invention discloses a polysulfonamide-based carbon fiber reinforced composite material and a preparation method thereof. The polysulfonamide-based carbon fiber reinforced composite material is prepared from the following raw materials in percentage by weight: 70-90% of polysulfonamide chopped fiber and 10-30% of short carbon fiber. The polysulfonamide-based carbon fiber reinforced composite material is prepared by adopting the following method: (1), carrying out ultrasonic treatment on the polysulfonamide-based carbon fiber and the short carbon fiber in a pretreating agent, washing and drying; and (2), carrying out hot-forming. The polysulfonamide-based carbon fiber reinforced composite material is prepared from the polysulfonamide and the carbon fiber which are used as the raw materials, is used for preparing high-performance engineering plastics by virtue of a hot-pressing technique, has good mechanical performances, heat resistance and electrical insulation property, and can be used for the electrical insulation fields of motors and transformers.

An energy storage device comprising one or more cells, wherein each cell is defined by a pair of electrodes and a separator placed therebetween, wherein each cell is bounded by two current collectors, the geometric form and size of said separator being identical to the form and size of said current collectors, and wherein in each cell, one electrode is printed on one of said two current collectors and the other electrode is printed on one face of the separator, the two electrodes being electronically insulated by means of said separator, and wherein the peripheral region of the separator, which surrounds the electrode printed thereon, is sealed.

The invention discloses a mixed crystal Ti (C, N)-based metal ceramic material and a preparation method thereof. According to the mixed crystal Ti (C, N)-based metal ceramic material and the preparation method thereof, two kinds of Ti (C, N) with different granularities are combined, Ti (C, N) particles with different granularities serve as a core, TaC, NbC, Mo2C and other carbides form a uniform outer ring structure with the core, finally, a typical core-shell structure is formed, the core-shell structures with different sizes form a mixed crystal structure, and the defect that hardness and toughness of a single and uniform crystal structure cannot be considered at the same time is overcome; and a Ti (C, N) solid solution is an infinite solid solution, when the N / C ratio is larger than 5 to 5, the activity of N is increased, pores are easily formed, and by adopting the combination of Ti (C0.5, N0.5) and Ti (C0.7, N0.3), local pores caused by the fact that the N / C ratio is larger than 5 to 5 are avoided.

The present invention is to provide a simple membrane assay method for detecting or quantitating an analyte in a specimen sample using an assay device equipped with a membrane bound with a capture-substance to capture the analyte, comprising the steps of filtering a specimen sample using a filter, dropping the filtrate onto said membrane and detecting the presence of the analyte in said specimen sample, as well as a simple membrane assay kit for detecting the presence of an analyte in a specimen sample, comprising (1) a filter tube, and (2) an assay device equipped with a membrane bound with a capture-substance to capture the analyte. The method or the kit can decrease the occurrence of false positivity and can provide a highly accurate detection of the analyte such as pathogen and antibody in a specimen collected in a medical scene or by an individual.

In a welding machine and welding method, for welding cylinder members together about an outside diameter, which prevents the cylinder members from being deformed and corrects the deformation of a portion to be welded, a laser beam, generated by a laser generator, is dispersed in two directions by a spectroscope. The laser beams focus on an outer cylinder member using two optical heads, respectively, in a plane perpendicular to a center axis of outer cylinder member. The optical heads are separated from each other by approximately 90 degrees in the plane. The outer and inner cylinder members are welded to each other in the circular direction using laser beams. Therefore, directions, in which the cylinder members are deformed due to the laser beams, are perpendicular to each other creating uniform radial deformation.