34 results about "Square decimeter" patented technology

The invention relates to a crucible for growing silicon ingot in the field of solar energy, in particular to a crucible for growing polysilicon ingot. The crucible for growing the polysilicon ingot is characterized in that: a bottom plate 2 of the crucible is provided with a plurality of holes 3; and the depth of the holes 3 is 1 to 25 mm, the aperture of the level part of the holes 3 and the bottom plate 2 of the crucible is 1 to 30 mm, and the distributed density of the holes 3 and the bottom plate 2 of the crucible is 1 to 100 per square decimeter. By adopting the crucible for growing the polysilicon ingot to grow polysilicon ingot, the directionality of crystal grains of the polysilicon ingot can be remarkably improved, crystal grains of the polysilicon ingot predominate in <110> and <112> crystal orientation, multiple parallel twins boundaries caused by <111> crystal face are reduced, the number of crystal boundaries is reduced, and simultaneously the percentage of sigma 3 shallow energy level crystal boundary is improved so as to effectively prolong the minority carrier lifetime of a silicon chip, and the conversion efficiency of solar cells made of the silicon chip is improved.

The invention relates to an aluminum profile, in particular to a thermal insulation aluminum profile with the surface carved with patterns. A manufacturing method of the thermal insulation aluminum profile with the surface carved with the patterns sequentially comprises the steps of preparation of a polyurethane thermal insulation glue component A and a polyurethane thermal insulation glue component B; manufacturing of the thermal insulation aluminum profile, wherein the component A and the component B are stirred according to the mass ratio of (6-8):1, then are poured into an aluminum profile groove moving at a speed of 0.15-0.2m / s and form the thermal insulation aluminum profile after standing and being cooled and solidified; preparation of modified powder coatings, wherein the mixture melts and is extruded out at the temperature of 130-140 DEG C, and then is cooled and broken to obtain the modified powder coatings; electrostatic spraying and solidification at the temperature of 100-120 DEG C for 10-18min; curving processing, wherein the patterns are carved in the curved surface and colored for the first time, particularly, hard anodizing is carried out in an electrolyte with the electric current density being 4-5 amperes per square decimeter and the temperature being 22-28 DEG C, and the electrolyte contains vitriol, acetic acid and a mixed solution formed by mixing glycolic acid and succinic acid according to the mole ratio of 1:1; the patterns are colored for the second time. The thermal insulation aluminum profile with the surface carved with the patterns has the dustproof and antibacterial performance, and is good in impact resistance, abrasion resistance and weather resistance, and high in glossiness.

The present invention provides a novel ageing-resistant and combustion-resistant wood-based panel with an immersion film paper veneer and a preparation method thereof. The method comprises the following steps: (1) sequentially paving an adhesive film, a medium density decal, an adhesive film and a decorative sheet on a substrate layer and assembling; 2) after assembling is completed, placing in a thermocompressor for hot pressing, wherein the adhesive film is film paper which is obtained by soaking kraft paper with gram weight of 40-60 grams / square decimeter by using phenolic resin and then drying and molding, the adhesive dipping amount of the kraft paper is 180%-250%, the medium density decal is film paper which is obtained by soaking kraft paper with gram weight of 210-2400 grams / square decimeter by using phenolic resin, and the adhesive dipping amount of the kraft paper is 30%-35%; and 3) cropping and trimming an ageing-resistant and combustion-resistant decorative panel. The decorative panel provided by the present invention has low formaldehyde emission and good ageing-resistant and combustion-resistant properties.

The invention relates to industrial waste water treatment, in particular to a chlorine dioxide-electroheterogeneous catalytic oxidation method for treating anisole waste water. Firstly, anisole is subjected to chlorine dioxide catalytic oxidation treatment, and in the presence of a catalyst, it is treated for 10 to 60 minutes to remove most of the organic matter; after the chlorine dioxide catalytic oxidation treatment, in the presence of a catalyst, the electro-multiphase Catalytic oxidation treatment, in the electric field, the DC voltage between the electrodes is 5-15V, and the current density is 200mA-400mA per square decimeter under the external electric field, so that the organic pollutants in the anisole wastewater are catalyzed and oxidized on the surface of the catalyst. The experimental results show that the combined technology can directly meet the discharge standard for the treatment of anisole wastewater, and the operating cost is low.

The invention relates to an electrochemical polishing method for a bearing retainer. The electrochemical polishing method for the bearing retainer comprises the steps of: preparing, electrochemical polishing, electrolyte mixing, cleaning by using cold water, passivating, cleaning by using hot water, drying and rust preventing; the electrolyte is prepared from phosphoric acid, water and chromic anhydride in a volume ratio of 8:4:1; the temperature of the electrolyte is controlled to be below 40 DEG C; in the electrochemical polishing step, the current density is 35A / square decimeter, the working voltage is 8-10V, the distance between the negative pole of an electrochemical polishing machine and a processed workpiece is 5-10mm, and the electrochemical polishing time is 90s; the preparing step comprises the sub-steps of: preparing the electrolyte, adding the electrolyte in an electrolytic vessel, placing a lead plate in the electrolytic vessel, connecting the lead plate and the negative pole of the electrochemical polishing machine, and preparing the processed workpiece; and the step of preparing the processed workpiece comprises the following sub-steps of: performing oil removing and cleaning on the processed workpiece, cleaning by using hot water, cleaning by using cold water, hanging on a hanger, and connecting the processed workpiece with the positive pole of the electrochemical polishing machine. According to the electrochemical polishing method, the clamping as well as the material charging and discharging are convenient, the occupying area is small, the cost is low, the burr removing effect is good, the labor intensity is obviously reduced, and the time and the labor are saved.