414 results about "Acid corrosion" patented technology

The invention relates to the technical field of high polymer materials, and provides an anti-aging cable and a preparation method thereof. The anti-aging cable comprises a conductor and a sheath layer, the sheath layer is prepared from the following raw materials in parts by weight: 40 to 60 parts of ethylene propylene diene monomer, 20 to 30 parts of ethylene-vinyl acetate copolymer, 20 to 22 parts of nano cellulose / montmorillonite composite material, 5 to 10 parts of nano silicon dioxide, 10 to 20 parts of magnesium hydroxide, 5 to 8 parts of zinc borate, 1.5 to 3 parts of composite antioxidant, 0.5 to 1.5 parts of ultraviolet light absorber, 1 to 1.2 parts of anti-aging agent and 1 to 2 parts of silane coupling agent. And 0.3 to 0.5 part of maleic anhydride grafted polypropylene. According to the anti-aging cable prepared in the invention, the high temperature resistance and the acid corrosion resistance of the anti-aging cable are improved, and the aging of the cable is effectively delayed.

The invention discloses a positive electrode material and a secondary battery, and belongs to the technical field of batteries, the material is characterized in that a coating layer is arranged on the surface of a positive electrode active substance, and meanwhile, the roundness of the coated positive electrode material and the ratio relation of the content ratio of free transition metal ions after the acid corrosion effect are regulated and controlled; the balance of the stability and the conductivity in the positive electrode material is coordinated, so that the secondary battery prepared from the positive electrode material has ideal electrochemical performance, and particularly has relatively excellent cycling stability and storage capacity retention rate in a high-temperature environment.

The invention relates to the technical field of thermal insulation decorative plates. A base body layer is prepared from the following raw materials in parts by weight: 25 to 30 parts of quartz, 10 to 15 parts of clay, 8 to 12 parts of fly ash, 7 to 11 parts of a binding and balancing agent, 6 to 9 parts of a talc powder modified tonality agent, 5 to 8 parts of glass beads, 4 to 7 parts of a flame retardant, 2 to 4 parts of a dispersing agent, 1 to 3 parts of a foaming agent and 20 to 25 parts of deionized water. The thermal insulation and decoration integrated board is prepared by matching the base body layer with the facing layer, the base body layer is prepared by blending and coordinating quartz, clay and fly ash with glass beads, a flame retardant, a dispersing agent and a foaming agent, and the added coupling and balancing agent and the added adjusting agent modified by blended talcum powder are matched and jointly synergic, so that the thermal insulation and decoration integrated board is prepared. The thermal insulation property, the impact resistance and the fire resistance of the product are improved in a balanced and coordinated manner, and meanwhile, the product has remarkable water resistance, acid corrosion resistance and thermal cycling stability.

The invention relates to the technical field of mortar, in particular to waterproof and acid-resistant mortar for municipal pipeline repair. 1000 parts by weight of the mortar comprise the following raw materials in parts by weight: 250-500 parts of a cementing material, 20-60 parts of an admixture, 1-5 parts of a water reducing agent, 30-100 parts of quartz powder, 10-40 parts of latex powder, 1-5 parts of a water repellent, 1-5 parts of fibers, 0.1-1 part of cellulose ether, 1-15 parts of a magnesium additive, 0.1-0.8 part of an early strength agent, 1-5 parts of a defoaming agent, 2-8 parts of a thixotropic lubricant, 0.5-3 parts of a retarder and the balance of aggregate. According to the invention, two cementing materials of a mixture of aluminate cement and sulfate-resistant portland cement are adopted, an admixture is doped, hydrophobic additives of a water reducing agent and latex powder are added, aggregate and the like are matched, and magnesium additives such as magnesium oxide and magnesium hydroxide are added, so that weak acid in sewage can be consumed through reaction, and calcium silicate crystals in the mortar are prevented from being corroded by the weak acid at the same time; acid etching resistance protection is formed; the device can be used for plane and vertical face maintenance in municipal sewage pipeline maintenance, and is good in construction state and excellent in performance.

The present invention relates to the field of metal corrosion and protection, and specifically to a preparation method and application of a modified chitosan Schiff base corrosion inhibitor. The preparation method comprises six steps: (1) preparing a gel-like chitosan dispersion; (2) preparing an ethanol solution of 2,6-dimethyl-5-heptenal; (3) adding the gel-like chitosan dispersion; (4) adding the ethanol solution of 2,6-dimethyl-5-heptenal and conducting a Schiff base reaction; (5) rotary evaporation and dehydration of the reaction product; and (6) washing, filtering, and drying. The present invention utilizes 2,6-dimethyl-5-heptenal, a common food additive, as a modifier to condense with natural polymer chitosan to prepare an acid corrosion-resistant corrosion inhibitor, with a simple process and low production cost. The invention is applied to N80 steel sheets in a hydrochloric acid medium for corrosion protection, uses a low concentration, and effectively improves the corrosion inhibition rate of the corrosion inhibitor on metals. The invention is a green, environmentally friendly, economical, and efficient corrosion inhibitor with good promotion prospects.

The invention relates to the technical field of refractory materials, and discloses a rotary kiln lining refractory material and a preparation method thereof, the raw materials comprise mullite, boron carbide, calcium hexaluminate, silicon carbide, silica powder, alpha-alumina micro powder, coating powder, modified refractory fiber, and a binder. The mullite and the boron carbide are selected as base materials and have excellent acid corrosion resistance, the titanium dioxide and the aluminum oxide are used for treating the refractory fibers, so that a compact enrichment layer is formed, low-temperature sintering is promoted by adding the yttrium oxide, the titanium dioxide is introduced into the refractory fibers, and the corrosion resistance of the refractory fibers is improved. And micropores in the fiber surface can be blocked, so that the porosity of the refractory material is reduced, and the diffusion path of acid steam is prolonged. The refractory material provided by the invention has excellent high-temperature stability and corrosion resistance.

The invention relates to TiC particle reinforced aluminum alloy powder for metal 3D printing, the aluminum alloy powder comprises an aluminum alloy matrix, modified TiC powder accounting for 5-10% of the total amount of the aluminum alloy powder is further added into the aluminum alloy matrix to obtain an aluminum alloy body, and the aluminum alloy body is further treated with modification liquid to obtain the TiC particle reinforced aluminum alloy powder. According to the TiC particle reinforced aluminum alloy powder, the modified TiC powder is added into the aluminum alloy matrix and is matched with the modification liquid for treatment, through coordination and joint synergism of the raw materials, the aluminum alloy fracture performance of the product is excellent, and meanwhile the heat resistance, the impact resistance stability and the acid corrosion stability effect of the product are remarkable.

The invention relates to the technical field of floating cables, and provides a waterproof corrosion-resistant floating cable which comprises a conductor, an insulating layer, a foaming layer and a sheath layer from inside to outside. The sheath layer comprises the following raw material components in parts by mass: 90-110 parts of a styrene-butadiene-styrene block copolymer, 60-80 parts of polypropylene, 80-90 parts of white oil, 15-25 parts of a filler, 2-3 parts of an antioxidant, 1-2 parts of a compatilizer and 1-3 parts of a dispersant; the filling agent is composite calcium carbonate; the preparation method of the composite calcium carbonate comprises the following steps: A1, adding calcium carbonate into an alkaline solution, and uniformly mixing to obtain a mixed solution; a2, adding magnesium chloride and aluminum chloride into water, and mixing to obtain a metal salt mixed solution; and A3, adding the metal salt mixed solution into the mixed solution, stirring, centrifuging, washing and drying to obtain the composite calcium carbonate. According to the technical scheme, the problem of poor acid corrosion resistance of the waterproof floating cable in the prior art is solved.

The invention discloses an aluminum gusset plate capable of purifying air. The aluminum gusset plate comprises an aluminum gusset plate base body, the aluminum gusset plate base body is immersed into a sufficient amount of modified coating agent to be fully treated, and after immersion is finished, the aluminum gusset plate base body is taken out and dried to form a modified coating layer. According to the aluminum gusset plate capable of purifying air, an aluminum gusset plate base body is matched with a modified coating agent for immersion treatment, bisphenol A epoxy resin in the modified coating agent serves as a base body raw material, a flame retardant, a curing agent, a silane coupling agent KH560 and carboxymethyl cellulose are added to serve as functional auxiliaries, and a zeolite additive and a conditioning agent are added to serve as coordinating and coordinating raw materials, so that the aluminum gusset plate capable of purifying air is obtained. The two components are synergic together, the air purification and flame retardance of the product are harmoniously improved, and the product has remarkable scratch resistance and acid corrosion stability.

The invention belongs to the technical field of wood processing, and relates to a manufacturing method of an E0-grade poplar low-odor fiberboard, which comprises the following steps: peeling poplar, chipping, adding an antibacterial and mildew-proof agent, storing for 1-2 months, screening wood chips, washing with water, cooking, separating fibers, and mixing and applying glue. Comprising the following steps: applying a deodorant, an environment-friendly adhesive, a waterproof agent and a curing agent, drying and sorting, paving and forming, pre-pressing, hot-pressing, turning over and cooling, sanding, spraying a sealing agent, inspecting and grading, and packaging and warehousing. According to the E0-grade poplar low-odor fiberboard produced by the method, the acid corrosion odor of an existing poplar board due to parasitic metabolism of microorganisms can be eliminated, the peculiar smell caused by fatty acid oxidation is reduced, the odor of wood is adsorbed, and the odor molecule concentration is reduced. The added titanium dioxide is distributed in the plate, and peculiar smell is continuously eliminated through photocatalysis; the environment-friendly quality and functions of the fiberboard are improved, and the requirements of high-quality life are met.

The invention discloses a halogen-free low-volatility anti-icing photo-thermal super-hydrophobic coating for the surface of a wind power blade and a preparation method thereof. The coating is prepared by compounding functionalized modified multi-walled carbon nanotubes, functionalized modified nano titanium nitride, polydimethylsiloxane / nano silicon dioxide modified epoxy resin and a curing agent. Wherein the multi-walled carbon nanotubes are subjected to amidation and dual functionalization of lauric acid and 3-aminopropyl triethoxy silane; the surface of the nano titanium nitride is uniformly modified through bionic polydopamine coating; hydroxyl-terminated polydimethylsiloxane and nano SiO are doped into an epoxy resin base material, so that the system is endowed with low surface energy and high weather-resistant binding force. After curing and film forming at room temperature for 24 hours or at 80 DEG C for 2 hours, the water contact angle is greater than or equal to 155 DEG C, the ice adhesion strength is less than or equal to 10 kPa, the photo-thermal temperature is greater than or equal to 40 DEG C, and the performance is not attenuated after 50 times of heating and cooling tests; and after 150-hour damp heat, 500-hour ultraviolet radiation, acid corrosion and abrasive paper friction, the coating does not blister or fall off. The coating disclosed by the invention is green and environment-friendly, low in curing energy consumption, high in photo-thermal temperature rise and strong in super-hydrophobic durability, and can be used for remarkably improving the long-term anti-icing capability of wind power blades in cold and high-humidity regions.

The utility model discloses a catalytic hydrogenation reactor for treating a biomass raw material with a high acid value and a high iodine value, and belongs to the technical field of oil product hydrogenation. The catalytic hydrogenation reactor comprises a reactor pressure-bearing container, an inner cylinder, an ash discharge port, a feeding assembly, a reaction assembly and a discharging assembly, the inner cylinder is arranged in the reactor pressure-bearing container, the feeding assembly and the reaction assembly are arranged in the inner cylinder, the reaction assembly comprises a ceramic tube bundle internal part, the discharging assembly is arranged above the inner cylinder, and the discharging assembly is arranged above the inner cylinder. The ash discharge port is formed in the center of the bottom of the reactor pressure-bearing container. By arranging the ceramic tube bundle internal part in the catalytic hydrogenation reactor, on one hand, the ceramic tube bundle internal part serves as a reaction assembly and has certain acid corrosion resistance, and on the other hand, the ceramic tube bundle internal part serves as a solid catalyst carrier, selective hydrogenation of high-acid-value and high-iodine-value biomass raw materials is achieved, the iodine value is effectively reduced, and coking of the high-iodine-value biomass raw materials in the reaction process is avoided; in addition, the acid value is maintained as far as possible while the iodine value is reduced, and the solid catalyst and the catalytic hydrogenation reactor are not corroded, so that the stability of the solid catalyst and the yield of the product are improved.

The invention discloses a preparation method of a polycarbosilane composite coating for a radar radome, which comprises the following steps: step 1, pretreating a to-be-coated product, coarsening the to-be-coated product by using abrasive paper or acid corrosion, cleaning the to-be-coated product by using a cleaning solvent, and drying the to-be-coated product in a drying oven, and step 2, carrying out modification treatment on polycarbosilane and resin; 3, adding a flatting agent and a plasticizer into the modified polycarbosilane, and uniformly stirring to prepare a coating solution; 4, adding an inorganic filler and a solvent into the coating solution, and carrying out rapid ball milling to prepare a mixed coating; and 5, preparing a coating on the surface of the antenna housing by adopting an impregnation method, and putting the coating into a drying oven to be cured. Polycarbosilane is converted into SiC at high temperature, epoxy resin ablates and absorbs a part of heat of laser, the contained chopped fibers and inorganic filler can play a role in heat insulation and protection, and the generated SiC and filler can reflect laser, so that the shell has excellent laser ablation resistance, and the shell is effectively prevented from being damaged.

The invention discloses a cable resistant to high temperature and acid corrosion, and the cable comprises a conductor layer which is formed by concentrically twisting a plurality of nickel-coated copper wires; the inner insulating layer coats the conductor layer and is used for improving the thermal conductivity of the cable; the outer insulating layer is sleeved on the inner insulating layer; the anti-bending buffer layer is coated outside the outer insulating layer; the electromagnetic shielding layer wraps the anti-bending buffer layer and is used for forming a shielding layer; the electromagnetic shielding layer is coated with the anti-corrosion functional layer, the anti-corrosion functional layer is a fluororubber belt, and benzotriazole corrosion inhibition microcapsules are embedded in a rubber layer of the fluororubber belt; and the mechanical strengthening layer is arranged outside the anti-corrosion functional layer in a sleeving manner. According to the invention, the conductor layer adopts the nickel-coated copper wire to improve the high-temperature-resistant conductivity, the corrosion inhibition microcapsules are embedded in the corrosion-resistant functional layer to realize long-acting corrosion resistance, the electromagnetic shielding layer is combined with graphene and the tinned copper strip to enhance the broadband shielding effectiveness, and the cable has long-acting corrosion resistance, mechanical property stability in a high-temperature environment and broadband electromagnetic shielding effectiveness.

The invention discloses a method for preparing an upper electrode of a gallium arsenide solar cell for a low-cost space, which comprises the following steps of: corroding a gallium arsenide epitaxial wafer taking germanium as a substrate in a mixed acid corrosion solution, removing an oxide layer and pollutants on the surface of the epitaxial wafer, taking out the epitaxial wafer, and cleaning the epitaxial wafer in deionized water; the surface of the active layer of the epitaxial wafer is tightly attached to the metal grid mesh, the epitaxial wafer is put into vacuum evaporation equipment, electrode metal is evaporated layer by layer in an electron beam evaporation mode, and after evaporation is completed, the epitaxial wafer is taken out from the vacuum evaporation equipment when the epitaxial wafer is cooled to 100 DEG C or below; and placing in a vacuum sintering furnace, heating at a constant temperature for a period of time, cooling to below 100 DEG C, and taking out to obtain the space gallium arsenide solar cell top electrode. A traditional photoetching process is replaced by a metal grid mesh, the surface of an active layer of an epitaxial wafer is tightly attached to the metal grid mesh, and then the epitaxial wafer is put into a vacuum coating machine to be subjected to metal evaporation. And the evaporated metal is deposited on the surface of the epitaxial wafer through gaps of the grid mesh to prepare a conductive upper electrode.

The invention belongs to the field of soil remediation materials, and particularly relates to a humic acid composite remediation material for a coal chemical industry polluted site and a preparation method of the humic acid composite remediation material. The method comprises the following steps: 1) uniformly mixing raw materials, alkali liquor and phosphide, standing, taking supernate, adding acid liquor to adjust the pH value of a system, and performing suction filtration to obtain a humic acid solution; 2) drying the solid obtained by the standing operation in the step 1), adding an acid solution, uniformly mixing, filtering, cleaning, adding a strong acid for corrosion, filtering again, cleaning, and drying to obtain a base material; and (3) heating the organic raw material, the emulsifier and the solvent, adding the mixed solution of the acyclic carboxylic acid and the humic acid solution while keeping stirring, adding the initiator, performing thermal reaction, adding the base material while being hot, uniformly mixing, drying and grinding to obtain the humic acid composite repair material. The humic acid composite remediation material can effectively improve the structure and quality of soil and effectively improve the soil remediation efficiency.

The invention relates to the technical field of ceramic membranes, in particular to a ceramic sintering aid and application thereof. The ceramic sintering aid is prepared from, by weight, 2-4 parts of manganese dioxide and 4-8 parts of modified aluminum powder, the modified aluminum powder comprises aluminum particles, and the surfaces of the aluminum particles are wrapped with epoxy resin layers. The mass ratio of the aluminum particles to the epoxy resin is (2-3): 1. Based on the fact that low-valence manganese ions are not resistant to corrosion, the corrosion resistance of the manganese ion-containing ceramic is improved by wrapping the ceramic particles with the corrosion-resistant layer. Meanwhile, the melting point of aluminum oxide is extremely high, and a coating layer is very difficult to form, so that aluminum powder is coated with resin, ceramic is sintered in an inert gas atmosphere, the resin is gasified at a high temperature, and aluminum is molten to form a liquid phase to coat raw material particles; after cooling, the atmosphere is changed into an air atmosphere, so that the molten aluminum is oxidized to form a compact aluminum oxide layer, low-valence manganese oxide which is easily corroded by acid is isolated, and the high-compactness and corrosion-resistant performance of the ceramic is achieved.

The invention discloses an alkali corrosion liquid for silicon in the semiconductor industry and a corrosion method of the alkali corrosion liquid. According to the alkali corrosion liquid, a corrosion method of slow acid corrosion and sufficient alkali corrosion is adopted, the surface roughness of the silicon wafer can be effectively reduced, in addition, in the alkali corrosion liquid, a surfactant, an active additive, sodium dodecyl polyoxyethylene ether sulfate and the like are matched with alkali, so that the surface tension of the alkali is further reduced, the corrosion rate is higher, and the service life of the silicon wafer is prolonged. The surface tension can be effectively reduced, the affinity of the etching liquid and a silicon substrate is improved, the selective etching capability to silicon dioxide in the etching process can be enhanced, corrosion to the silicon substrate is reduced, and a more uniform and accurate etching effect is achieved. Through measurement, the surface roughness Ra of the silicon wafer obtained by the corrosion method is less than or equal to 0.1 mu m, and the single metal cation is lt; and the corrosion rate can reach 1-1.5 microns / minute and is stabilized within + / -5%.

The invention provides a curing agent, a two-component coating, a coating and application of the two-component coating and the coating, and belongs to the technical field of heavy anti-corrosion coatings. The curing agent provided by the invention is prepared from the following raw materials in parts by mass: 60-85 parts of a phenolic aldehyde amine curing agent, 5-20 parts of diethylenetriamine and 5-20 parts of a hydroxymethyl urea compound. The hydroxymethylurea compound is introduced into the curing agent, and carbonyl of the hydroxymethylurea compound has a strong electron withdrawing effect, so that adjacent secondary amino groups hardly participate in an epoxy curing reaction at room temperature; hydrogen on a secondary amine group in the introduced hydroxymethyl urea compound and hydroxymethyl of the hydroxymethyl urea compound are subjected to a dehydration self-polymerization reaction to form a macromolecular product, so that erosion of hydrogen ions is effectively prevented, internal gaps of the coating are filled, further corrosion of water, the hydrogen ions and salt to the coating is prevented, and the purpose of resisting acid corrosion is achieved.

The invention discloses a preparation process of carboxylated shell-based activated carbon for organic matter adsorption, and particularly relates to the technical field of adsorption materials, and the preparation process comprises the following steps: mixing coconut shell powder and walnut shell powder, crushing, and loading potassium hydroxide in stages in a gradient manner; carrying out two-stage microwave activation in an inert atmosphere, namely low-temperature pre-activation in the first stage and high-temperature activation in the second stage, and introducing carbon dioxide; the activated product, phosphoric acid, a laccase-peroxidase complex enzyme preparation and a buffer solution are subjected to ultrasonic synergistic modification, and then a weak acid reaction is maintained through dynamic pH regulation and control; and finally, performing graded washing and gradient drying to obtain a finished product. According to the method, high-density carboxyl grafting and graded pore construction are synchronously realized under mild conditions through a synergistic effect of directional catalysis of biological enzyme and dynamic regulation of microwave, so that the problems of structural damage caused by strong acid corrosion, pore imbalance caused by fixed parameters and stability reduction caused by insufficient post-treatment in a traditional process are solved; the adsorption performance and the regeneration cycle performance of the material are also obviously improved.

The invention relates to the field of resin coatings, and particularly discloses a coating containing a resin composition as well as a preparation method and application of the coating. The coating containing the resin composition is prepared from the following raw materials: the resin composition, a curing agent and an auxiliary material mixture, and the weight ratio of the resin composition to the curing agent to the auxiliary material mixture is 100: (30-50): (50-150). Wherein the resin composition is formed by compounding triglycidyl isocyanurate, bisphenol F type episulfide resin and tetraglycidyl amine type epoxy resin. The preparation method comprises the following steps: respectively adding the auxiliary material mixture into the resin composition and the curing agent according to a certain ratio, uniformly mixing, and then mixing to finally obtain the coating containing the resin composition, the test shows that the coating has good bonding strength, high temperature resistance, acid corrosion resistance, rapid cooling resistance and rapid heating performance, the surface drying time meets the construction requirement, and the coating has good application prospects. The coating can be applied to the inner wall coating of the wet desulphurization chimney.

The specific embodiment of the invention provides an anti-rust coating and a coating, the anti-rust coating comprises a water-based rust conversion agent and a water-based epoxy coating, the water-based rust conversion agent comprises a water-based acrylic emulsion and ammonium polyacrylate salt, the pH value of the water-based rust conversion agent is 6-8, Fe < 3 + > is converted into a stable complex in situ through a carboxyl chelation reaction, and the stable complex is added into the water-based epoxy coating. The water-based rust conversion agent and the epoxy coating have the advantages that the water-based rust conversion agent is added into the water-based epoxy coating, the continuous acid etching risk of a matrix is avoided, the water-based epoxy coating comprises polydopamine grafted and coated silicon dioxide, micropores can be reduced by the coating, permeation of water, oxygen and chloride ions can be inhibited, hydrolytic stripping and secondary corrosion can be prevented, and the water-based rust conversion agent and the epoxy coating have good compatibility; the formed coating is excellent in interlayer adhesive force and compact and firm in film layer, and the long-acting protection requirement in a severe corrosion environment can be met when the anti-rust coating is used for coating corrosion prevention of a steel member.

The invention discloses a pulse copper plating process with low TOC and high deep plating capacity. The pulse copper plating process comprises the following steps that 1, pretreatment is conducted, specifically, a substrate is subjected to cleaning, oil removing and acid etching rust removing treatment; 2, surface treatment: treating the surface of the substrate by using a treating agent; thirdly, acid copper sulfate copper plating is conducted, specifically, the treated substrate is placed in a copper plating tank, and electroplating is conducted through a copper electroplating solution of high-purity copper sulfate with the purity being 99.8%; 4, post-treatment is conducted, specifically, the copper-plated substrate is cleaned and dried; step 5, inspection: performing external inspection and performance inspection on the dried substrate; by adding the electroplating liquid, reducing the bath changing frequency and reducing the sewage treatment capacity, the production cost is reduced, the pollution to the environment is greatly reduced, and the production cost of an enterprise is reduced; tOC is low under the same load condition, the cylinder changing frequency is reduced, and wastewater discharge is reduced; meanwhile, due to low TOC, the service life of the additive can be doubled, and the production cost is reduced.

The invention provides a preparation method of a back contact heterojunction solar cell. The method comprises the following steps of: after polishing and cleaning two surfaces of a silicon wafer, sequentially depositing a passivation layer i, a doping layer n, a silicon nitride isolation layer and a sacrificial layer on the back surface; the sacrificial layer pattern is etched through picosecond laser, and the doping layer n layer is exposed through HF acid corrosion; synchronously etching a passivation layer i and a doping layer n in a back opening region by adopting alkali liquor, and performing front texturing; a passivation layer i and a doping layer p are secondarily deposited on the back surface, a doping layer n is secondarily exposed through HF acid after a P region pattern is etched through laser, a passivation layer i and an anti-reflection layer are deposited on the front surface, a TCO transparent conductive layer is deposited on the back surface, a P / N region electrode is subjected to silk-screen printing and light injection curing, and finally a P / N region is isolated through laser. According to the method, the rear texturing process is combined with the laser and wet etching, so that the front film layer is prevented from being corroded by the wet method, the process is simplified, the cost is reduced, and high-efficiency and low-damage industrial mass production is realized.

The invention discloses magnesium phosphate cement paste based on low-temperature calcined phosphate tailings and a preparation method of the magnesium phosphate cement paste, and relates to the technical field of magnesium phosphate cement materials. Uniformly mixing soluble phosphate, low-temperature calcined phosphate tailings, light calcined magnesia and a delayed coagulation substance to obtain a mixed dry material; adding the calculated water reducing agent into water, and fully and uniformly mixing for later use; the mixed dry material and the water reducing agent mixed solution are mixed, magnesium phosphate cement paste is obtained, the dry material mixing time is not less than 1 min, and the stirring time is not less than 150 s when the mixed solution is added. The phosphate tailings are used for replacing dead-burnt magnesium oxide, so that a large amount of consumption of the existing accumulated phosphate tailings can be realized, the value of the phosphate tailings is improved, effective elements in the phosphate tailings are fully utilized, cyclic utilization of resources is realized, meanwhile, the manufacturing cost of the magnesium phosphate cement can be remarkably reduced, and impurities such as silicon and aluminum in the phosphate tailings possibly form a compact structure; the acid corrosion resistance and the salt corrosion resistance of MPC are improved.

The invention provides an anti-PID multi-layer composite photovoltaic packaging adhesive film and a preparation method and application thereof.The adhesive film comprises a first EVA adhesive film layer, a second EVA adhesive film layer and a third EVA adhesive film layer which are sequentially stacked, the first EVA adhesive film layer comprises an acid absorbent, the second EVA adhesive film layer comprises an ion trapping agent, and the third EVA adhesive film layer comprises a second EVA adhesive film layer and a third EVA adhesive film layer which are sequentially stacked. And the third EVA adhesive film layer comprises an ion trapping agent and an acid absorbent. The acid absorbent is added into the first layer of the anti-PID multilayer composite photovoltaic packaging adhesive film to absorb acetic acid generated by EVA hydrolysis, so that the reaction between the acetic acid and sodium salt on the surface of glass is effectively reduced; an ion trapping agent is added into the second layer to effectively block sodium ion migration, and a dual initiation system improves the crosslinking degree to further block ion migration; an ion trapping agent is added into the third layer to further absorb free ions, and an acid absorbent prevents acid corrosion to the battery piece and the lead; the multi-layer structure synergistically realizes high-efficiency PID resistance.

The invention discloses an experimental device and method for electrochemical testing of boiling nitric acid corrosion in a high-temperature reduced-pressure environment, and relates to the technical field of electrochemical testing, the experimental device is composed of a reduced-pressure boiling corrosion reaction system, an electrochemical testing system, a heating system, an acid gas absorbing and drying system, a vacuum degree control system and an automatic integrated control system; the decompression boiling corrosion reaction system is connected with the acid gas absorption and drying system, the vacuum degree control system and the heating system are respectively connected with the acid gas absorption and drying system and are in contact with the decompression boiling corrosion reaction system, and an automatic integrated control system is adopted to control the experimental device. The experimental device and method can test and simulate the electrochemical corrosion behavior of the high-temperature reduced-pressure boiling nitric acid in the evaporator environment for spent fuel post-treatment, and can realize the weight loss and electrochemical test of various materials under the condition of reduced-pressure boiling strong corrosive solution at the same time.

The invention provides a preparation method of triphenylchloromethane, and belongs to the technical field of medical intermediates. The preparation method comprises the following steps: preparing a suspension from pure benzene, a composite catalyst and an adsorbent, dropwise adding carbon tetrachloride to obtain a reaction solution, heating the reaction solution to 60-80 DEG C, treating with 808nm laser while stirring, and performing post-treatment to obtain the triphenylchloromethane. The composite catalyst catalyzes pure benzene and carbon tetrachloride to react to generate triphenylchloromethane, hydrogen chloride is released, the adsorbent can adsorb hydrogen chloride in situ, and acid corrosion and catalyst poisoning can be prevented while forward proceeding of the reaction is maintained; the composite catalyst and the adsorbent are used for realizing catalysis-adsorption synergistic promotion of forward proceeding of the reaction, so that the dosage of the catalyst is reduced, the reaction time is shortened, the output of wastewater is reduced, and the reaction yield and the purity of triphenylchloromethane are improved.

The invention relates to a solar cell, and particularly provides a back contact solar cell and a preparation method thereof, and a cell assembly, and the preparation method of the back contact solar cell comprises the steps: carrying out the oxygen injection of a film layer region of a first semiconductor opening region or a second semiconductor opening region to be opened, and forming an oxygen-containing film layer which is liable to be corroded by an acid; and then solution corrosion is carried out to form an opening, and the opening mode is not easy to damage the bulk silicon layer or the functional film layer, so that the conversion efficiency of the battery is ensured.

The invention provides a multifunctional window and a preparation method thereof, and relates to the technical field of windows. The multifunctional window comprises a base layer, a bonding layer and a functional layer which are sequentially stacked, the material of the base layer comprises at least one of glass and plastic; the material of the functional layer comprises sapphire; the bonding layer is prepared from the following raw materials in parts by weight: 5 to 55 parts of acrylic resin, 15 to 30 parts of urethane acrylate, 5 to 10 parts of amino silane, 3 to 15 parts of siloxane and / or siloxane derivatives, 0.1 to 1 part of 4, 4-diaminodiphenylmethane, 0.1 to 1 part of dibutyl phthalate and 0.1 to 1 part of photoinitiator; the bonding layer is obtained by crosslinking and curing the preparation raw materials. By selecting the materials of the base layer, the bonding layer and the functional layer, the prepared multifunctional window has good light transmission, wear resistance, acid corrosion resistance and high strength, and is suitable for being applied to multiple fields.