61results about How to "No attenuation" patented technology

The invention relates to an electric lead, in particular to a carbon fiber composite core composition and a method for preparing a carbon fiber composite core. The composition comprises high-temperature epoxy resin, a curing agent, an accelerant and carbon fiber. The preparation method comprises the following steps that: the carbon fiber enters a coupling agent sprayer by a creel through a yarn-guide mechanism and a tension control mechanism; a tension controller adjusts the tension; a high-pressure spray head is arranged in the coupling agent sprayer to spray a foggy solvent; the fiber enters a vacuum injection pre-soaking device through the coupling agent sprayer to soak a high-temperature epoxy resin adhesive and then enters a heating molding mould to be cured and molded; the molding mould is divided into three areas for heating, and the three areas are a preheating area, a gelling area and a curing area respectively; the fiber is cured again by a drying cylinder after being cured; and the whole process is continuously driven by a hydraulic driving machine. Compared with the conventional lead, a carbon composite core lead has the advantages of light weight, high strength, low line loss, small sag, high temperature resistance, corrosion resistance, environmental friendliness and the like, and achieves the energy conservation, environmental protection and security of power transmission. The carbon fiber composite core composition and the method for preparing the carbon fiber composite core are widely applied to overhead power lines.

The invention discloses a preparation method of metallurgy-prepared polysilicon solar cell, relates to a solar cell, and provides a preparation method of the metallurgy-prepared polysilicon solar cell, which can adopt silicon material with lower purity (5-6N) and greatly reduce the production cost. The method comprises the steps of adding a phosphorus source to the metallurgy-prepared polysiliconchip to be treated for a phosphorus gettering treatment and removing the gettering layer; leading oxygen with water vapour into the metallurgy-prepared polysilicon chip treated with phosphorus gettering and gettering layer removing for wet-oxygen oxidation, and removing the oxidation layer; and preparing the metallurgy-prepared polysilicon chips treated with the wet-oxygen oxidation and the oxidation layer removing into the cells according to a conventional process, and annealing the prepared cell chip.

The invention relates to a hierarchical structure gaphene-based tensile tansparent conductive elastomer preparation method. The method comprises steps: after being stretched, the polymer elastomer is applied to an opening outer edge of an open container to form closed space, the container is heated, and the polymer elastomer is expanded; a reduced graphene oxide solution coats the expanded elastomer surface, cooling to room temperature is carried out, after restoring the initial morphology, the polymer elastomer is taken down, and thus, the hierarchical structure gaphene-based tensile tansparent conductive elastomer is obtained. The method of the invention is simple, the reaction condition is mild, no special equipment requirements is required, and mass production is facilitated; and the prepared hierarchical structure gaphene-based tensile transparent conductive elastomer presents excellent tensile performance while high transmittance and high conductivity are ensured, and experiments prove that the conductivity can still be smaller than 500 omega per square while the tensile ratio is larger than 400%.

The invention relates to rubber asphalt. The rubber asphalt is compounded from the following ingredients: base asphalt, waste rubber powder, an activating and recycling agent and a fixing and anti-aging agent. Accounted by total weight of the rubber asphalt, per 100% of the rubber asphalt comprises the ingredients in the following percentage: 70-89.4% of the base asphalt, 10-29.4% of the waste rubber powder, 0.1-1% of the activating and recycling agent and 0.5-1.5% of the fixing and anti-aging agent. A preparation method of the rubber asphalt comprises the following steps: heating the base asphalt to 120-160 DEG C; slowly adding the waste rubber powder and the activating and recycling agent into the heated base asphalt according to a certain proportion in a reaction kettle while stirring, wherein stirring speed is 300-1500 round / minute and stirring time is 5-20 minutes; raising temperature of the mixture to 170-180 DEG C, and performing high-speed shearing on the heated mixture by a shearing machine or a colloid mill for 5-30 minutes, wherein the shearing speed is 3000-5000 round / minute; and adding the fixing and anti-aging agent into the mixture and reacting the mixture while stirring for 2-5 hours. Compatibilities of the rubber powder and the asphalt are improved by the preparation method, so that the problem of instabilities of rubber asphalts in high-temperature storage is solved.

The invention relates to the technical field of automobile brake, and specifically relates to a drum-type brake lining. The drum-type brake lining comprises a plurality of arc-shaped steel backings, wherein two arc-shaped friction blocks are arranged on each arc-shaped steel backing, and are distributed at two end parts of the arc-shaped steel backing at a first predetermined distance; and the plurality of arc-shaped steel backings are distributed on an assembly surface of a brake drum in parallel at a second predetermined distance. The invention provides a drum-type brake lining which is simple in production process, low in production cost, good in heat dissipation effect, low in wear rate and few in eccentric wear phenomena.