51results about How to "Reduce the number of cracks" patented technology

The invention discloses a silicon coated nano-titania-doped cement-based composite material. The silicon coated nano-titania-doped cement-based composite material contains cement, silicon coated nano-titania, silica fume, coal ash, sand, a water reducer and water. The invention further discloses a preparation method of the cement-based composite material. Experiment results show that the silicon coated nano-titania-doped cement-based composite material combines the advantages of titania and silicon dioxide and takes full advantage of the characteristics of toughening effects, filling effects, nucleation effects, volcanic ash effects and high strength and toughness of nano-titania and silicon dioxide, so that the rupture strength, compressive strength and durability of the silicon coated nano-titania-doped cement-based composite material are better that those of a silicon coated nano-titania-doped cement-based composite material. Besides, the silicon coated nano-titania-doped cement-based composite material further has electrical properties and can meet the requirements on multifunction and intelligence of structural materials in future.

The invention discloses exosome freeze-drying powder, a preparation method of the exosome freeze-drying powder and a preparation comprising the exosome freeze-drying powder. The preparation method of the exosome freeze-drying powder comprises the following steps of: preparing platelet factor-rich plasma: collecting autologous blood for centrifugation, preparing exosome: collecting autologous fat to prepare fat mesenchymal stem cells, and culturing the mesenchymal stem cells, preparing a freeze-drying liquid: mixing the platelet factor-rich plasma and the exosome and adding trehalose for mixing, and performing freeze-drying: performing freeze-drying on the freeze-drying solution. The preparation comprises the exosome freeze-drying powder, hyaluronic acid and saline. The preparation can effectively solve the problems that the existing cosmetic preparation has a poor filling effect, short maintenance time and high immunological rejection response.

The invention discloses a sloping diamond synthesis block, which comprises a graphite column, conductive steel rings at the two ends of the graphite column, and pyrophyllite blocks in the periphery of the graphite column and the conductive steel rings; the conductive steel rings are filled with pyrophyllite rings and dolomite rings; the periphery of the graphite column is provided with a heating element; an insulating element is arranged between the heating element and the graphite column; the pyrophyllite block consists of two half blocks buckled with each other; and a graphite column cavity is formed in the middle of the two buckled half blocks, and each half block is in a triangular prism shape. The sloping pyrophyllite blocks are formed, and a joint seam of the sloping pyrophyllite blocks is at the corner of the pyrophyllite blocks, and is staggered from the middle part of a non-heating top hammer; hot gas cannot rush to the non-heating top hammer, so that thermal fatigue of the non-heating top hammer can be obviously mitigated, and the top hammer is effectively protected; and the number of the broken non-heating top hammers is greatly reduced, the broken hammer accidents are reduced, the consumption of the hard alloy top hammer is greatly reduced, and the production cost is lowered.

The invention provides a multi-functional high-performance reduction material of polycarboxylic acid series and a preparation method thereof. The preparation method comprises the steps of raising the temperature of a 2-acrylamido-2-methyl propane sulfonic acid solution to 55-85 DEG C under a nitrogen protection environment, conducting sufficient stirring, dissolving the solution uniformly, dropwise adding a mixed solution of polyethylene glycol monomethyl ether methyl acrylate, acrylic acid, diethylene glycol monobutyl ether maleic anhydride monoester and an initiator solution to the 2-acrylamido-2-methyl propane sulfonic acid solution within 2-4 hours, and obtaining a first-order reaction solution after dropwise adding is completed; leaving the first-order reaction solution being subjected to treatment at the constant temperature of 55-85 DEG C for 1-2 hours, then adding a catalyst, conducting a reaction for 1-2 hours at the temperature of 55-100 DEG C, conducting vacuum filtration for two hours, after the reaction is ended, cooling the mixture to the room temperature, then using an alkali solution for adjusting the pH value to be 7, discharging the material, and obtaining the multi-functional high-performance reduction material of the polycarboxylic acid series. According to the multi-functional high-performance reduction material of the polycarboxylic acid series and the preparation method thereof, the main synthesis raw materials are abundant in source, the synthesis process is simple, and good construction performance, mechanical properties and volume stability are achieved.

The invention discloses a continuous casting billet strengthening device and a continuous casting billet strengthening method in a continuous casting process. The strengthening device is arranged at a secondary cold area below a crystallizer and is arranged near a continuous casting billet; and the strengthening device comprises a shot blaster, steel shots, a steel shot collecting box, a shot carrying pipeline and a shot spraying pipeline, wherein the shot blaster is connected with the steel shot collecting box by virtue of a shot carrying channel, the steel shot collecting box is arranged below the shot blaster, and the shot spraying channel is arranged at an exit of the shot blaster.

The invention provides an anti-crack coating agent used for investment-cast casting, and relates to the related technical field of investment casting. The anti-crack coating agent used for investment-cast casting comprises, by component, hydroxyl propyl methyl cellulose, alkylphenol ethoxylates, anti-crack metal liquid, sodium tetraborate, sodium metasilicate, sodium phosphate, the Malay powder, liquid paraffin, dodecanol and deionized water. According to the anti-crack coating agent used for the investment-cast casting, the qualification rate of investment casting products can be increased, the number of cracks and the burst degree of a casting piece are reduced, cracking probability of the casting pieces during the pouring process is reduced through using of the coating agent, and the product qualification rate is improved.

The invention discloses a manufacturing method for prolonging the service life of a KR stirrer, specifically comprising the steps of: selecting a steel core, removing impurities on the surface of the steel core, washing and cleaning the steel core, and airing; welding a group of riveting pieces with different heights ranging from 30mm to 80mm on the surface of the steel core; covering a refractory fiber material layer with the thickness of 0-50mm on the surface of the steel core, coating a castable layer with the thickness of 60-120mm on the refractory fiber material layer, and baking the entire device for 36-60h at the temperature of 80-100 DEG C; and continuously heating the baked device to ensure that the temperature reaches 320-350 DEG C, and maintaining the temperature for 8-16h. The method is simple and energy-saving, and the used materials are not molten at high temperature and can stop the heat from being transmitted to the steel core, therefore, not only is the expansion degree of the steel core alleviated, but also the extrusion stress generated due to the expansion of the steel core can be effectively buffered so that the quantity of the cracks generated after the KR stirrer is baked can be reduced to the minimum.

The invention discloses a horizontal construction joint of a rockfill dam face and a construction method of the horizontal construction joint. The horizontal construction joint comprises a primarily poured block and a secondarily poured block, wherein a joint-crossing steel bar is arranged between the primarily poured block and the secondarily poured block, two ends of the joint-crossing steel bar are arranged in the primarily poured block and the secondarily poured block respectively and is perpendicular to a construction joint formed by the primarily poured block and the secondarily poured block. The joint-crossing steel bar can be arranged by crossing the joint in the middle of the face and can also be arranged in an upper-layer and lower-layer manner by crossing the joint in the face. Double-layer joint-crossing steel bars comprise an upper-layer joint-crossing steel bar and a lower-layer joint-crossing steel bar which are combined respectively to form an upper-layer reinforcing mesh and a lower-layer reinforcing mesh, and the upper-layer reinforcing mesh and the lower-layer reinforcing mesh are connected through connecting bars. With the adoption of the structure, the operation safety of a dam can be improved, the service life of the dam can be prolonged, deformation influences of the primarily poured block in the pouring process are reduced, and the horizontal construction joint is more suitable for being used under weighted cover and blanket zones of the long face rockfill dam and under the condition of temporary stopping of silo pouring due to construction causes.

The invention relates to a pitch mixed material cracking resistance tester which is used for solving the problem of test detection of pitch mixed materials and comprises an environmental box, a fixed support seat, a sticking platform plate, a slide plate, a slide plate displacement loading mechanism, a spoke type sensor, a rotating coupling and a servo motor, wherein the fixed support seat is installed in the environmental box; the sticking platform plate is installed on the fixed support seat and touches and is connected with the slide plate in a movable fit way; the bottom of the slide plate is connected with the slide plate displacement loading mechanism; the slide plate displacement loading mechanism is connected with the servo motor by the rotating coupling, and the spoke type sensoris connected to a coupling disk of the rotating coupling; a side support seat of which the bearing is embedded into the environmental box is installed on the rotating coupling; and the servo motor isconnected outside the side body of the environmental box. The invention has simple structure and simple and convenient use and is suitable for carrying out a cracking resistance test on various pitchmixed materials.

The present invention discloses a layer -like and column -shaped composite structure of corrosion -resistant coating and preparation methods. It is a alloy layer on the surface of the pre -processing substrate to spray alloy powder through the low -pressure plasma spraying method.Preheat the surface of the alloy layer on the surface of the alloy alloy layer to obtain a composite melting layer of the columnar structure through the plasma melting technology melting alloy powder and ceramic powder mixed powder, and the cycle is re -to obtain until the multi -layer layer and column that continuously changes along the thick direction performance alternately alternately alternately alternatelyGradient structure.The present invention not only improves the binding force and corrosion resistance of the coating and the matrix; it can also obtain a multi -layer and column intercess of the multi -layer and column alternative gradient structure that continuously changes along the thick direction, and improve the impact performance of the coating material.

The invention discloses a silicon coated nano-titania-doped cement-based composite material. The silicon coated nano-titania-doped cement-based composite material contains cement, silicon coated nano-titania, silica fume, coal ash, sand, a water reducer and water. The invention further discloses a preparation method of the cement-based composite material. Experiment results show that the silicon coated nano-titania-doped cement-based composite material combines the advantages of titania and silicon dioxide and takes full advantage of the characteristics of toughening effects, filling effects, nucleation effects, volcanic ash effects and high strength and toughness of nano-titania and silicon dioxide, so that the rupture strength, compressive strength and durability of the silicon coated nano-titania-doped cement-based composite material are better that those of a silicon coated nano-titania-doped cement-based composite material. Besides, the silicon coated nano-titania-doped cement-based composite material further has electrical properties and can meet the requirements on multifunction and intelligence of structural materials in future.

The invention discloses a freeze-dried exosome powder, a preparation method thereof, and a preparation containing the freeze-dried exosome powder. The preparation method of the freeze-dried exosome powder includes the following steps: preparation of platelet-rich factor plasma: taking Autologous blood, prepared by centrifugation, prepared by exosomes; obtained from autologous fat, prepared adipose-derived mesenchymal stem cells, and cultured the mesenchymal stem cells; prepared by lyophilization: platelet-rich factor plasma, and exosomes The body is mixed, and trehalose is added therein, and mixed to obtain the preparation; freeze-drying: the freeze-dried liquid is subjected to freeze-drying to obtain the preparation. The preparation includes freeze-dried exosome powder, hyaluronic acid and physiological saline, which can effectively solve the problems of poor filling effect, short maintenance time and large immune rejection in existing cosmetic preparations.

The invention provides a transparent conductive substrate, which includes a glass substrate and a transparent conductive adhesive. A strip-shaped groove is provided on one surface of the glass substrate according to the direction of the pre-designed conductive circuit. The transparent conductive glue is filled in the strip grooves to form conductive lines in the glass substrate. The transparent conductive substrate and its manufacturing method provided by the present invention open a strip-shaped groove according to a pre-designed conductive circuit on the glass substrate, and fill the transparent conductive glue into the strip-shaped groove to form a conductive circuit, thereby reducing The number of cracks on the surface of the glass substrate effectively improves the strength of the transparent conductive substrate. The invention also provides a manufacturing method of the transparent conductive substrate.