109results about How to "High melting point" patented technology

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention provides a diamond / copper multi-layer composite material capable of being subjected to high-temperature silver-copper welding, a preparation method of the diamond / copper multi-layer composite material and a heat dissipation device comprising the diamond / copper multi-layer composite material capable of being subjected to high-temperature silver-copper welding. The diamond / copper multilayer composite material capable of being subjected to high-temperature silver-copper welding is of a sandwich structure, a middle layer is made of a diamond / copper composite material, and an upper layer and a lower layer are respectively made of any one of tungsten copper, molybdenum copper and copper / molybdenum copper / copper (CPC material). The surface of the diamond / copper multilayer composite material is covered with the metal alloy material, so that the diamond / copper multilayer composite material has remarkably improved strength and lower thermal expansion coefficient at high temperature, and can be welded with ceramic at high temperature, so that a silver-copper solder can be used for replacing a gold-tin solder, and the application cost of the diamond / copper multilayer composite material is reduced.

The invention relates to a flame-retardant rubber and plastic thermal insulation material and a preparation method thereof, and belongs to the technical field of high polymer materials. The flame-retardant rubber-plastic thermal insulation material comprises the following components in parts by weight: 50-75 parts of nitrile rubber, 20-45 parts of PVC resin, 10-15 parts of a plasticizer, 1-10 parts of a foaming agent, 1-5 parts of a foaming promoter, 10-40 parts of a composite flame retardant and 2-6 parts of a modified anti-aging agent, cyclohexanehexol phosphate in the composite flame retardant is heated and dehydrated into phosphoric acid, a barrier layer is formed to inhibit release of combustible materials, and dimethylallylamine combusts to absorb heat and cooperates with phosphorus-oxygen double bonds for flame retardance; a pre-product in the modified anti-aging agent reacts with a free radical of a rubber molecular chain, so that the heat resistance and the aging resistance of the material are improved, a maleimide group enhances an intermolecular acting force, the rigidity and the heat resistance of the molecular chain are improved, and material aging caused by high temperature is reduced; the flame-retardant rubber and plastic thermal insulation material prepared by the invention not only has an excellent anti-aging effect, but also has good flame retardance.

The invention discloses a vanadium-based neutron transparent alloy material and a preparation method thereof, the alloy is a disordered solid solution of a body-centered cubic structure formed by a single crystal phase, the chemical composition is V < 1-x > Mx, x is less than 0.1, V is a metal element vanadium, and M is selected from one or more of Al, Nb, Ta, Fe, Sn or Mo. According to the alloy, neutron diffraction peaks generated by metal vanadium can be effectively eliminated while a metal vanadium body-centered cubic crystal structure is not damaged, the neutron transparent alloy material is successfully prepared, the process is simple and feasible, the formula has diversified choices, multiple novel double-element vanadium-based neutron transparent alloys are prepared, and the neutron transparent alloy material has good application prospects. In addition, the multi-element vanadium-based transparent neutron alloy is prepared for the first time, all the materials have excellent chemical and mechanical properties, and compared with an existing Ti2.08Zr alloy, the multi-element vanadium-based transparent neutron alloy has better high-temperature chemical stability.

The preparation method comprises the following steps: preparing PET non-woven fabric raw paper, preparing a nano-zinc oxide particle dispersion liquid, dipping the PET non-woven fabric raw paper in a solution, carrying out heat treatment to form a functional PET non-woven fabric, preparing a functional alkenyl ionic liquid, carrying out heat treatment to form a PET non-woven fabric, and carrying out heat treatment to form the PET reinforced bi-crosslinked polyionic liquid composite solid electrolyte. Adding a cross-linking agent, a lithium salt, a plasticizer and a photoinitiator to prepare an electrolyte precursor solution; the functional PET non-woven fabric is placed in the electrolyte precursor solution, standing and dipping are carried out under the vacuum condition, then thermal polymerization and photopolymerization are carried out, and the solid electrolyte is prepared and applied to the solid polymer lithium ion battery; the zinc oxide particles are compounded into the PET non-woven fabric to form the non-woven fabric which is thin in thickness, high in tensile strength and appropriate in porosity, and the non-woven fabric is cross-linked with the functionalized alkenyl ionic liquid and the electrolyte precursor solution step by step, so that the ionic conductivity, the electrochemical window and the thermal stability of the solid electrolyte and the safety performance of the battery in use are improved.

The invention discloses an antioxidant carbon aerogel material and a preparation method thereof. The method comprises the following steps: sequentially adding a solvent, a boron-containing modifier and a silicon-containing modifier into phenolic resin for esterification reaction; sequentially curing, drying and carbonizing to obtain boron-silicon modified carbon aerogel; depositing a SiC inner coating on the boron-silicon modified carbon aerogel under the assistance of supercritical CO2; a Zr-Si ceramic oxygen barrier layer and a SiO2 sealing and filling layer are sequentially prepared through a sol-gel method, and the carbon aerogel material with the SiC-Zr / Si-SiO2 composite coating is prepared. The invention also provides the aerogel material prepared by the method, the oxidation resistance of the aerogel material is obviously improved, and the aerogel material can be used for preparing a thermal insulation material applied to the field of high-temperature thermal protection.

The invention discloses Ag-free high-temperature active alloy brazing filler metal and a preparation method and application thereof. The brazing filler metal alloy comprises 9.5-12.5 wt% of Ge, 9-11 wt% of Ti, 0.1-1.5 wt% of Ni and the balance Cu, the melting point of the brazing filler metal alloy ranges from 960 DEG C to 975 DEG C, and the recommended brazing temperature ranges from 1000 DEG C to 1100 DEG C. The product forms comprise foil strips, wires and powder paste. The preparation method comprises the steps of vacuum alloying, spherical gas atomization powder preparation, centrifugal ball milling powder mixing, spark plasma sintering, homogenizing heat treatment, isothermal rolling, isothermal rotary swaging and precise drawing. The alloy brazing filler metal is suitable for ceramic high-temperature direct packaging, diamond material device high-temperature brazing, refractory metal vacuum brazing and the like, high-strength weld joints can be obtained, the service temperature is high, the cost is low, and the problem that Ag element steam pollutes devices can be effectively solved.

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 present invention belongs to the technical field of nickel-based alloy connection, and specifically relates to a brazing method for improving the high-temperature welding performance of nickel-based alloy joints and a prepared multi-layer welded joint. First, the brazing material is processed into an amorphous brazing foil, and then the amorphous brazing foil is pre-placed between the joint surfaces of the workpieces to be welded of the Inconel625 nickel-based alloy, and then the workpieces to be welded are fixed and placed in a vacuum brazing furnace for brazing. After the brazing is completed, the workpiece group is cooled to below 100°C and then solution treated in a vacuum brazing furnace. The amorphous foil-shaped brazing material used in the present invention has a small difference in melting point from the parent material, which is conducive to capillary action and can optimize the formation and performance of the brazed joint; the solution treatment can improve the distribution and morphology of brittle phases such as borides in the brazing seam. The present invention can be used as a special brazing method for multi-layer brazing joints or Inconel 625 nickel-based alloys, and has great application prospects.

The invention provides a wet-process injection material for a bosh, a bosh and the lower part of a furnace body of an iron-making blast furnace and a preparation method of the wet-process injection material. The injection material comprises the following components in parts by weight: 3-9 parts of tabular corundum particles of 3-6 mm, 23-33 parts of titanium corundum particles of 1-3 mm, 10-20 parts of titanium corundum particles of 0-1 mm, 0-6 parts of 88 high bauxite particles of 0-1 mm, 0-8 parts of 97 silicon carbide particles of 0-1 mm, 4-12 parts of 97 silicon carbide 45M powder, 6-13 parts of titanium corundum 200M powder, 4-8 parts of tabular corundum 325M powder and 4-7 parts of 71 pure calcium aluminate cement. The invention relates to a high-strength concrete, which is prepared from the following components in parts by weight: 5 to 10 parts of aluminum oxide micro powder, 5 to 10 parts of 96 silicon dioxide micro powder, 0.05 to 0.1 part of additive 1, 0.03 to 0.07 part of additive 2, 0.01 to 0.03 part of additive 3 and 0.05 to 0.1 part of additive 4. The wet-process injection material is used for being sprayed on the bosh, the bosh and the lower part of a furnace body of an iron-making blast furnace for lining making, so that the furnace shape can be quickly recovered, and various performance indexes such as high-temperature performance, wear resistance and slag iron corrosion resistance of the material can be improved, and the service life of the material on the parts can be greatly prolonged.

The invention discloses a bio-based cyclic ester monomer and a preparation method of corresponding bio-based polyester. The preparation method comprises the following steps: esterifying bio-based unsaturated fatty acid and diol to obtain corresponding unsaturated diester; the bio-based unsaturated diester is prepared into a bio-based unsaturated cyclic ester monomer and a saturated cyclic ester monomer through a reaction based on olefin metathesis in combination with a depolymerization cyclization method and a catalytic hydrogenation method. The method specifically comprises the following steps: preparing a bio-based unsaturated polyester precursor through a polymerization reaction based on olefin metathesis, and preparing a bio-based unsaturated cyclic ester monomer through a depolymerization cyclization method; carrying out catalytic hydrogenation on the bio-based unsaturated polyester precursor to prepare a bio-based saturated polyester precursor, and preparing a bio-based saturated cyclic ester monomer through a depolymerization cyclization method; the bio-based unsaturated cyclic ester monomer can be subjected to catalytic hydrogenation to obtain a bio-based saturated cyclic ester monomer. The bio-based unsaturated cyclic ester monomer and the bio-based saturated cyclic ester monomer synthesized by the invention can be polymerized to synthesize bio-based polyester with good regularity, and the bio-based polyester is an ecological environment-friendly high polymer material.

The invention discloses an integrated optical fiber sensor for measuring temperature strain at extreme high temperature, and the sensor comprises a crystal optical fiber which comprises a first optical fiber segment, a second optical fiber segment and a third optical fiber segment which are connected in sequence; the first optical fiber grating is formed in the first optical fiber section of the crystal optical fiber; the second optical fiber grating is formed in the second optical fiber section of the crystal optical fiber; wherein the diameters of the first optical fiber section and the third optical fiber section are the same, and the diameters of the second optical fiber section are different from those of the first optical fiber section and the second optical fiber section. The integrated optical fiber sensor can measure the temperature and the strain at the same time in an extremely high temperature environment. The invention further discloses a preparation method of the integrated optical fiber sensor.

The present application relates to the technical field of flame-retardant pipes, and in particular to a low-temperature impact-resistant flame-retardant silicon core pipe and a preparation method thereof. The low-temperature impact-resistant flame-retardant silicon core pipe comprises an inner layer and an outer layer, and the outer layer comprises the following raw materials in parts by weight: 70-90 parts of high-density polyethylene resin, 15-25 parts of star-shaped SBS, 3-5 parts of maleic anhydride grafted high-density polyethylene, 6-10 parts of inorganic flame retardant, 10-15 parts of elastic flame-retardant microspheres, 0.1-0.5 parts of antioxidant, 0.4-0.8 parts of antibacterial agent, 2-4 parts of carbon fiber, 1-3 parts of dispersant and 1-3 parts of silane coupling agent; the invention has the advantages of improving the mechanical properties of the pipe while improving its flame retardant properties.

The minced fillet is used as a raw material to produce the protein jelly food, and the product is rich in high-quality protein and high in nutritional value. A physical fishy smell removing method and a biological fishy smell removing method are combined, so that the fishy smell of the minced fillet is effectively removed. 50-100 parts of pigskin and 100 parts of minced fillet are jointly gelatinized to form binary protein gel, so that on one hand, the gel strength of the prepared product is improved, and meanwhile, the melting point of the product is improved. Besides, a microwave technology (the microwave power is 0.5-20kW and the treatment time is 60-600s) is adopted to combine a thermally induced gelation process and a sterilization process into one, so that microorganisms are effectively killed while the gelation process is realized. The fishy smell-removed minced fillet-pigskin protein jelly food with high gel strength can be obtained, and the food has a soft and elastic texture, a fine taste and extremely high nutritional value of fish meat, can be stored at normal temperature for a long time, can be directly eaten after being unsealed, and can also be shredded, sliced and seasoned for eating.

The application discloses an alloy cushion block for a large walking beam heating furnace and a preparation method thereof, and the preparation method comprises the following steps: S1, determining the melting point of the alloy cushion block based on the atomic penetration depth of an alloy B containing FeO on multiple different alloy A with a melting point higher than that of the alloy B; S2, studying the load-bearing condition of the alloy cushion block to determine the required compressive strength; S3, designing the composition of the alloy cushion block; and S4, carrying out the industrial design of the alloy cushion block and starting smelting. Through reasonable alloy composition and production process design, the application provides a high-temperature heat-resistant alloy cushion block, improves the strength and melting point of the alloy cushion block, enables the alloy cushion block to maintain high strength at high temperature, solves the problem of FeO bonding in a molten state, reduces the phenomenon of heating furnace nodulation, and has universality and is suitable for various casting processes.

This invention relates to transition layer materials and welding processes for welding dissimilar steel and aluminum materials, belonging to the field of welding technology. The transition layer material for welding dissimilar steel and aluminum materials of this invention comprises a copper layer, a copper alloy layer, and a zinc alloy layer arranged sequentially; the copper layer is adjacent to the steel base material, and the zinc alloy layer is adjacent to the aluminum base material; the copper content in the copper alloy layer is 62.0%-64.0%; the zinc content in the zinc alloy layer is 89.0%-91.0%; the mass ratio of the copper layer, copper alloy layer, and zinc alloy layer is (0.9-1.1):(2.3-2.7):(1.8-2.2). By sequentially setting the copper layer, copper alloy layer, and zinc alloy layer between the steel base material and the aluminum base material, a gradual transition from the steel base material to the aluminum base material is achieved, effectively avoiding the formation of brittle Fe-Al intermetallic compounds during direct welding, and enhancing the mechanical properties and durability of the welded joint.

The invention discloses high-dosage rubber powder modified asphalt and a preparation method thereof, and the rubber powder modified asphalt is prepared by adding 22-30 parts by weight of modified rubber powder into 100 parts by weight of road petroleum asphalt, the modified rubber powder is prepared from the following components in parts by weight: 85 to 95 parts of common rubber powder, 3 to 6 parts of phenolic resin, 0.6 to 1.2 parts of microcrystalline wax, 2 to 5 parts of naphthenic oil, 0.2 to 0.6 part of antioxidant and 0.2 to 0.6 part of EVA (Ethylene Vinyl Acetate). The preparation method comprises the following steps: (1) preparing the modified rubber powder; and (2) preparing the modified asphalt cement. According to the invention, co-melting and blending of the rubber powder and the asphalt are improved, the mixing amount of the rubber powder in the rubber asphalt can be obviously increased, the pavement and durability are greatly improved, the production cost and environmental pollution of the asphalt mixture are effectively reduced, and the asphalt mixture has economic and social double benefits, is simple in preparation process and has relatively high practical application value.

The application belongs to the technical field of adhesives and sealants, and specifically provides a sealing wax as well as a preparation method and application thereof. The sealing wax comprises the following components in parts by mass: microcrystalline wax 40-60 parts, polyethylene wax 1-5 parts, ethylene-vinyl acetate copolymer 3-8 parts, low-molecular-weight polyisobutylene 2-5 parts, medium-molecular-weight polyisobutylene 2-5 parts, tackifying resin 15-20 parts, and flame retardant 3-5 parts. The number-average molecular weight of the low-molecular-weight polyisobutylene is less than 5000, and the viscosity-average molecular weight of the medium-molecular-weight polyisobutylene is 10000-40000. Through the design and mutual compounding of the components, the sealing wax has a high melting point, a low water absorption rate, a high volume resistivity, good high-temperature and low-temperature resistance, and strong waterproof and moisture-proof performance, high mechanical strength and toughness, high insulation, high transparency, and strong sealing effect, and has good flow leveling property and good flame retardant performance, and can meet the strict use requirements of high-end electronic equipment.

This invention relates to the field of polymer synthesis technology. This invention provides a controlled polymerization method for a high-alternation-degree ETFE copolymer, comprising the following steps: (1) adding a solvent to a high-pressure reactor, replacing the air, and then filling it with an initial monomer mixture to a total pressure of 1.5-2.5 MPa, wherein the monomer mixture is a mixture of tetrafluoroethylene and ethylene; (2) heating to 60-85°C, adding an initiator to initiate the polymerization reaction; (3) simultaneously adding the monomer mixture continuously or semi-continuously during the polymerization reaction; (4) adding a chain transfer agent, and discharging the product after the reaction, i.e., the high-alternation-degree ETFE copolymer. This invention also provides a controlled polymerization method for a high-alternation-degree ETFE copolymer. This invention also provides an application of the high-alternation-degree ETFE copolymer in new energy, aerospace, high-end equipment manufacturing, and photovoltaic fields. The high-alternation-degree ETFE copolymer of this invention has high alternation degree (>92%), high thermal stability, and excellent mechanical properties.

The invention provides a CMAS corrosion resistant material with stable phase, the CMAS corrosion resistant material is solid solution ceramic, the molecular formula of the solid solution ceramic is (Zr1-x-yHfx) TayO2 + 0.5 y, x is greater than 0.4 and greater than 0.1, and y is greater than 0.4 and greater than 0.1. By doping the elements Hf and Ta, the high-temperature phase change of ZrO2 is inhibited, the high-temperature stability of (Zr1-x-yHfx) TayO2 + 0.5 y is enhanced, and meanwhile, the melting point and CMAS corrosion resistance of the material are improved. Meanwhile, the invention also provides a preparation method of the material.

This invention provides a temperature-sensitive, environmentally friendly microcapsule and its preparation method, relating to the field of polymer materials. The microcapsule is composed of chitosan, cellulose derivatives, gelatin, and dopamine. The microcapsule can achieve different cross-linking structures depending on the component ratios, and can controllably release the core substance within a temperature range of 90-150℃. The materials provided by this invention eliminate toxic reagents, and the microcapsules are all environmentally friendly materials, causing no environmental pollution. The microcapsule preparation method is characterized by temperature sensitivity and controllability, being green, environmentally friendly, and pollution-free, with a simple preparation method suitable for large-scale industrial production. Utilizing temperature-sensitive, biodegradable, and comprehensively environmentally friendly materials, it has broad application prospects in catalyst coating, drug coating, and other fields, meeting the needs of multiple sectors.

The invention discloses an aluminum alloy battery frame for electric vehicles and a preparation method thereof. The weight percentages of the components of the aluminum alloy are as follows: Si: 0.75-0.80%, Fe: ≤0.15%, Cu: 0.10-0.15%, Mn: 0.45-0.50%, Mg: 0.58-0.63%, Cr: 0.10-0.15%, Zn: ≤0.10%, Ti: 0.03-0.05%, Zr: 0.05-0.1%, and the balance is Al. The battery frame is obtained by smelting, alloying, degassing and deslagging, casting, homogenizing, extruding and aging the aluminum alloy. The battery frame can meet the following requirements: 1) tensile strength ≥305MPa, yield strength ≥280MPa, elongation ≥13%; 2) there is no loss of strength after short-term baking at 205°C for 1h, and the strength loss is within 10MPa after long-term baking at 150°C for 1000h; 3) the collision crush test meets the requirements of the three-peak curve, the energy absorption is ≥30KJ, and the cracking form is uniform without breakage.

The present invention relates to a pharmaceutical preparation, and in particular to a suspension type budesonide inhalation aerosol and a preparation method thereof. The budesonide inhalation aerosol comprises budesonide, phospholipids and calcium chloride; the budesonide micropowder particles are prepared by high pressure homogenization combined with spray drying technology, and perfluorooctane bromide is not used. The budesonide inhalation aerosol has a high fine particle fraction (FPF), and the delivery dose uniformity RSD is less than or equal to 15%. The suspension type budesonide inhalation aerosol prepared by the method of the present invention has a high fine particle dose and good delivery dose uniformity.

The invention discloses a high-strength and high-toughness ADC12 cast aluminum alloy and a preparation method thereof, and belongs to the technical field of aluminum alloy preparation. The ADC12 cast aluminum alloy comprises the following chemical components in percentage by weight: 9.6%-12.0% of Si, less than or equal to 1.3% of Fe, 1.5%-2.5% of Cu, less than or equal to 0.5% of Mn, less than or equal to 0.3% of Mg, less than or equal to 0.5% of Ni, less than or equal to 1.0% of Zn, less than or equal to 0.2% of Sn, 0.1%-0.3% of Tb and the balance of aluminum and inevitable impurity elements. According to the ADC12 cast aluminum alloy, the content of a copper element is reduced, and meanwhile, a trace amount of rare earth terbium element is added to refine a structure, so that the strength and the toughness are improved, and the strength reduction caused by the reduction of the copper element is made up. Meanwhile, artificial aging treatment is provided, and the strength is further improved by separating out a secondary strengthening phase, so that the ADC12 material which is low in cost, high in strength and high in toughness is developed, and the high-strength requirement under the extreme condition is met.

The invention discloses soldering paste resistant to high-temperature post-soldering residues and a preparation method of the soldering paste. The soldering paste comprises soldering flux and paste flux according to the weight ratio of (8-9): (1-2). The solder comprises a tin-bismuth series alloy and a titanate coupling agent modified halloysite nanotube. On the basis of the flux paste, the flux paste comprises the following raw materials in parts by weight: 35-65 parts of composite rosin; 35 to 55 parts of a solvent; 5-15 parts of tartaric acid; 5-10 parts of a thickening agent; 1-3 parts of a corrosion inhibitor; 2-4 parts of an antioxidant; and 2-3 parts of oleyl alcohol polyoxyethylene ether. The high-temperature-resistant soldering paste left after welding has the advantages of being resistant to high temperature, low in splashing and good in wettability, the welding effect is hard and firm, and welding spots are full and bright. In addition, the preparation method provided by the invention has the advantages of being simple, easy to operate and beneficial to large-scale production and application.

The present application relates to the field of photovoltaic technology, and particularly relates to a solder strip preparation method, a solder strip and a solder strip preparation device. The solder strip preparation method comprises: stage-wise calendering a base material to form a first segment and a second segment on the base material, the first segment and the second segment being different in shape; wrapping a protective tape on the first segment; plating a tin-resistant metal coating on the second segment; removing the protective tape from the first segment, and plating a solder coating on the first segment, the melting point of the tin-resistant metal coating being greater than the melting point of the solder coating. The solder strip prepared by the solder strip preparation method does not have the phenomenon of tin accumulation at the bending part, avoids the contact between the solder strip and the film strip, avoids the micro-short circuit phenomenon of the photovoltaic module, and prolongs the service life.

The invention discloses an iron maltol-oxalic acid eutectic crystal which is formed by taking iron maltol as a medicinal active component and oxalic acid as a eutectic crystal ligand and adopting a suspension stirring method. In an X-ray powder diffraction pattern obtained through Cu-K alpha radiation measurement, the iron maltol-oxalic acid eutectic crystal has characteristic diffraction peaks at the diffraction angles 2 theta of about 14.7 + / -0.2 degrees, 17.0 + / -0.2 degrees, 17.6 + / -0.2 degrees, 24.8 + / -0.2 degrees, 26.6 + / -0.2 degrees and 26.9 + / -0.2 degrees. The iron maltol-oxalic acid eutectic crystal is good in stability, and does not generate crystal transformation in at least 60 days under an accelerated condition. Compared with iron maltol, the iron maltol-oxalic acid eutectic has the advantages that the solubility of the iron maltol-oxalic acid eutectic in water is relatively low, the dissolution rate of the eutectic with low solubility is generally low, the drug concentration peak value in a short time can be avoided, the toxic and side effects of the iron maltol are reduced, and the medication compliance is improved.

The present application relates to a kind of polymerization device of high viscosity polymer, belong to polymerization reaction device technical field.The present application includes reaction main body, with reaction inner cavity, reaction inner cavity is equipped with even root for stirring high viscosity polymer's helical stirring shaft, helical stirring shaft includes main shaft and the helical blade connected in the outer side of main shaft, and the helical blade in each adjacent two helical stirring shafts is staggered with each other on the side of mutual approach;Main shaft is equipped with the heat-conducting medium passage that is penetrated from top to bottom, and the heat-conducting medium passage in each main shaft is connected by connecting short pipe to be connected to be the serpentine heat-conducting medium circulation total passage, one end of heat-conducting medium circulation total passage is heat-conducting medium inlet, and the other end is heat-conducting medium outlet, and heat-conducting medium inlet and heat-conducting medium outlet are located in the same end of the reaction main body;Reaction main body outer side is equipped with heating box, and heating box is used to heat heat-conducting medium, and heating box is located in the side close to heat-conducting medium inlet and heat-conducting medium outlet.

This is to provide a polyamide resin composition that has good mechanical characteristics such as tensile characteristics, bending characteristics and impact resistance, and low water absorption. The polyamide resin composition of the present invention comprises 55 to 78% by mass of an aliphatic polyamide resin (A), 20 to 35% by mass of glass fiber (B), 1 to 9% by mass of a crosslinking agent (C), 0.1 to 1.5% by mass of a heat-resistant agent (D) and 0 to 6% by mass of an inorganic filler other than glass fiber (E) in 100% by mass of the polyamide resin composition, and the aliphatic polyamide resin (A) has an average number of carbon atoms per one amide group of exceeding 6.

The utility model discloses a kind of ventilation devices of graphitization furnace, it is related to ventilation device technical field, including pipe body, the inside of pipe body is provided with airflow passage through pipe body, the equal-interval air hole of array is on the outer wall of pipe body, the air hole and airflow passage are communicated, the both ends of airflow passage are provided with ladder groove, the sleeve pipe is sleeved in the ladder groove, the sleeve pipe in one is equipped with screw plug, another sleeve pipe is connected with the ventilation pipe of outside. The utility model discloses a kind of ventilation devices of graphitization furnace, pipe body is made of high purity graphite, high purity graphite has very high melting point and thermal stability, can withstand the extreme high temperature required in graphitization process, improves the stability of gas supply pipeline when graphitization furnace is used, simultaneously, can help evenly distribute heat, ensure the consistency of temperature in furnace, improves the quality of production.