22results about How to "High softening temperature" patented technology

The invention provides a sealing gasket for an alkaline high-temperature electrolytic cell and a preparation method of the sealing gasket. The invention firstly provides the sealing gasket for the alkaline high-temperature electrolytic cell, and the sealing gasket comprises the following material components in parts by mass: 150-180 parts of polytetrafluoroethylene (PTFE) resin, 0-80 parts of polyether-ether-ketone (PEEK), 5-18 parts of calcium carbonate, 10-50 parts of polyphenylene sulfide (PPS) short fibers, 0-20 parts of aluminum oxide, 0-10 parts of molybdenum disulfide, 1-5 parts of barium titanate and 0-15 parts of graphite. The preparation method of the sealing gasket for the alkaline high-temperature electrolytic cell comprises the following steps: at normal temperature, stirring and mixing the material components according to a specific ratio to obtain a mixture, pre-pressing and molding the obtained mixture, sintering, and finally cooling to obtain the sealing gasket for the alkaline high-temperature electrolytic cell. The sealing gasket provided by the invention meets the requirement of the high-temperature working environment of the alkaline high-temperature electrolytic bath as high as 100-300 DEG C, has high-temperature resistance and strong-alkali resistance, and is simple in preparation method, low in production cost and easy to industrially popularize, and existing equipment can be utilized.

This invention discloses a sealing glass with good wettability to titanium alloys, comprising the following components in weight percentage (wt.%): 30-50 wt.% SiO2, 1-5 wt.% Al2O3, 10-30 wt.% B2O3, 10-20 wt.% TiO2, 5-9 wt.% CaO, 1-5 wt.% SrO, 0.1-0.5 wt.% BaO, 2-8 wt.% ZrO2, 1-2 wt.% La2O3, 0-1 wt.% CeO2, and 0.1-0.5 wt.% CoO. This invention also provides a method for preparing sealing glass, comprising the following steps: weighing raw materials according to a mass percentage of a glass composition, mixing them evenly, heating and melting them into a glass melt; after the glass melt is uniform, pouring the molten glass melt into deionized water for rapid cooling and quenching, then drying to obtain glass melt fragments; then ball milling the dried glass fragments into glass powder, drying and sieving to ensure the glass powder particle size is less than 100 micrometers, thus obtaining the desired sealing glass material powder. This invention has a linear thermal expansion coefficient of (50-70)×10⁻⁶ in the range of 20-300 °C. ‑7 / ℃; glass softening temperature is 610-660℃; advantages include chemical stability of level IV or above.

The present invention relates to a polyurethane resin composition including an isocyanate group-terminated urethane prepolymer (E) and a neutralizer (F). The isocyanate group-terminated urethane prepolymer (E) contains a reaction product of a polyol (A) containing a polycarbonate polyol (B) having an average number of hydroxyl functional groups exceeding 2, an organic acid (C), and a polyisocyanate (D), in which a total content of urea groups in the polyurethane resin composition is 0.01 to 0.80 mmol / g with respect to a sum of a mass of the isocyanate group-terminated urethane prepolymer (E) and a mass of the chain extender (G), and the polycarbonate polyol (B) has a deemed average number of functional groups of 2.0 to 3.90.

The invention discloses a high-strength and high-conductivity copper-tin alloy wire resistant to high-temperature softening and a preparation process thereof. The high-strength and high-conductivity copper-tin alloy wire comprises the following raw materials in percentage by mass: 0.25-0.35 wt.% of Sn; according to the Cu-Sn-Zr alloy wire, the tensile strength is 700 MPa or above, the electric conductivity is higher than 75% IACS, the softening-resistant temperature reaches 400 DEG C or above, the use requirement of the high-strength and high-conductivity Cu-Sn alloy wire at the high temperature can be met, and after deformation heat treatment of an alloy rod is completed, the tensile strength of the alloy rod is larger than or equal to 700 MPa, the electric conductivity is higher than 75% IACS, and the softening-resistant temperature reaches 400 DEG C or above; and the alloy bar is subjected to gradient cooling treatment through special gradient cooling equipment, so that the problems of hot cracks and the like in the cooling process are avoided, and the quality of the finished alloy bar is ensured.

The invention relates to the field of metal processing, and provides a horizontal continuous casting production process of a large rotor winding double-hole copper bar, which remarkably improves the product quality and the production efficiency through innovative design and optimization. The process mainly comprises the steps of raw material preparation, smelting, heat preservation, horizontal continuous casting, casting blank forming, cold rolling, drawing, aftertreatment, quality inspection and the like. Wherein in the raw material preparation stage, the material performance is optimized by accurately controlling the proportion of alloy elements, for example, 0.03%-0.1% of silver, 0.02%-0.05% of magnesium, 0.03%-0.08% of zirconium and 0.02%-0.06% of chromium are added. And the uniformity is ensured by adopting a double-frequency induction technology for smelting. The innovation of the horizontal continuous casting link is particularly prominent, the crystallizer body made of high-heat-conductivity-coefficient copper alloy is matched with the high-purity isostatic pressing graphite double-hole mold, and accurate segmented cooling control is achieved. The most characteristic is that the middle cooling structure effectively solves the problem of non-uniform cooling in the solidification process of the double-hole copper bar by forming a spraying outlet in the rear half section of the mold rod and adopting a high-frequency pulse spraying technology.

The present invention discloses a high-temperature glass powder and a preparation method thereof, and in particular, relates to a high-temperature glass powder for nickel paste of electronic cigarettes and a preparation method thereof. The glass powder comprises a base glass and a second component, the base glass comprises CaO, Al2O3, SiO2, B2O3 and Na2CO3, and the second component comprises one or more of TiO2, CeO2, ZrO2, Nb2O5 or WO3. The preparation method thereof is as follows: the base glass powder raw material is mixed uniformly and then preheated, placed in a glass frit furnace for high-temperature insulation, the second component is added to the mixture and then subjected to high-temperature smelting, water quenching, and crushing. The present invention makes the glass powder have a high softening temperature by adding the second component and smelting in steps, thereby improving the bonding strength between the nickel-based alloy layer and the porous ceramic substrate, reducing the vitrification penetration into the ceramic substrate, and improving the cycle life and stability.

The utility model relates to the technical field of grinding wheel structures, in particular to a light-color dust-free grinding wheel structure which comprises a grinding wheel structure body, stable installation mechanisms are arranged on the surfaces of the grinding wheel structure body, a fixing ring and a frame body, and a light-color dust-free mechanism is arranged on the surface of the grinding wheel structure body. And heat dissipation and chip removal mechanisms are arranged on the surfaces of the grinding wheel structure body and the fixing ring. The grinding wheel structure is more convenient to operate, the structural strength of the grinding wheel structure body and the grinding material layer can be improved when the grinding wheel structure is used, efficient heat dissipation can be conducted when the grinding wheel structure is used, the phenomenon that the grinding wheel structure body and the grinding material layer are broken during working is reduced, and the service life of the grinding wheel structure is greatly prolonged; in addition, when the grinding wheel structure is used, the grinding and cutting performance of the grinding wheel structure body and the grinding material layer can be greatly improved, sufficient curing and crosslinking can be achieved, the good grinding and cutting performance is obtained, meanwhile, the grinding reaction is decomposed, and slag is reduced.

The invention discloses a method for manufacturing a Cu-Cr-Nb-RE material guide rail for an electromagnetic rail gun, comprising the following steps: S1, preparing a blank, including material vacuum induction melting, vacuum electrode gas atomization powder making, and hot isostatic pressing; S2, forging; S3, primary annealing; S4, rough rolling; S5, secondary annealing; S6, intermediate rolling; S7, machining; Cr and Nb in the Cu-Cr-Nb-RE material manufactured by the invention form a large amount of Cr2Nb strengthening phase, which is evenly dispersed in the alloy, can refine and control the grain size of copper, and the Cr2Nb phase is still stable when it exceeds 1600°C, avoiding the problems of fatigue and ablation of the hot end part of the material at high temperature. The Cu-Cr-Nb-RE material guide rail manufactured by the method of the invention not only has high strength and high electrical conductivity, but also has a high softening temperature and a comprehensive performance of high temperature ablation resistance, which significantly improves a series of problems existing in the current guide rail.

A high-performance chromium bronze rod and a preparation method thereof, wherein the alloy composition of the chromium bronze rod is Cr: 0.2-0.65%, Ti: 0.1-0.5%, Ag: 0.1-0.5%, Mg: 0.1-0.5%, Cu balance, and the percentage of each element above is mass percentage. The preparation process is: semi-continuous casting + electromagnetic stirring → water seal extrusion → pickling → drawing → finished product aging. The alloy element ratio of the present invention is scientific and reasonable. By introducing Ti, Ag, and Mg alloy elements, the size, morphology, and crystal structure of the Cr precipitation phase are controlled, and the strength, electrical conductivity, softening temperature and other properties of the material are improved. The preparation process is simple. The prepared chromium bronze rod has an electrical conductivity of ≥85% IACS, a tensile strength of ≥650Mpa, a softening temperature of ≥650℃, A100mm ≥20%, and a hardness of ≥90HRB, which can meet the requirements of future high-temperature switch materials and enable it to work stably under high temperature conditions.

The invention belongs to the technical field of road paving materials, and particularly relates to a preparation method of a cementing material for cold-mixed colored permeable asphalt, and the preparation method comprises the following steps: 1) under a stirring condition, firstly adding epoxy resin and allyl glycidyl ether into a mixing kettle, stirring and mixing, slowly adding a plasticizer, and stirring and mixing; (2) sequentially adding heavy calcium carbonate, talcum powder and pigment, and stirring until the materials are uniformly dispersed without particles and bubbles, so as to obtain the component A; (3) uniformly mixing the component A and the component B under a stirring condition according to the weight ratio in the claim 1 to obtain a cementing material; and the component B is an alicyclic amine curing agent. The cementing material prepared by the method disclosed by the invention has the advantage of high water permeability, and also has excellent durability and rutting resistance.

This invention provides a high-flatness copper-nickel-tin-zinc alloy and its preparation method, belonging to the field of copper alloy manufacturing technology. The high-flatness copper-nickel-tin-zinc alloy provided by this invention, by mass percentage, comprises the following chemical composition: Ni: 0.2-3.0%, Sn: 0.2-2.0%, Zn: 0.05-0.2%, Fe: 0.01-0.1%, P: 0.02-0.08%, Nb: 0.05-0.28%, Ta: 0.05-0.2%, La: 0.02-0.1%, and the balance Cu. The results of the examples show that the copper-nickel-tin-zinc alloy of this invention has a tensile strength >600 MPa and an elongation A... 11.3 The heat shrinkage rate is 5-7%, the hardness is >180HV, the conductivity is ≥40%IACS, the bending rate is 7-8mm / m, the flatness is ≤0.05mm, and the heat shrinkage rate is ≤0.006%.

The present invention relates to the field of metal processing, and provides a horizontal continuous casting production process for double-hole copper bars of large rotor windings, which significantly improves product quality and production efficiency through innovative design and optimization. The process mainly includes steps such as raw material preparation, smelting, heat preservation, horizontal continuous casting, ingot forming, cold rolling, drawing, post-processing and quality inspection. Among them, the raw material preparation stage optimizes the material properties by accurately controlling the alloy element ratio, such as adding 0.03-0.1% silver, 0.02-0.05% magnesium, 0.03-0.08% zirconium and 0.02-0.06% chromium. Dual-frequency induction technology is used in smelting to ensure uniformity. The innovation of the horizontal continuous casting link is particularly prominent. The crystallizer body made of high thermal conductivity copper alloy is combined with a high-purity isostatic graphite double-hole mold to achieve precise segmented cooling control. The most distinctive feature is the middle cooling structure, which effectively solves the problem of uneven cooling during the solidification process of the double-hole copper bar by setting a jet outlet in the rear half of the mold rod and using high-frequency pulse jet technology.

The present invention relates to a thermoplastic composition comprising an aromatic polycarbonate and a copper chromium spinel laser direct structuring additive. The composition comprises: a) 85 to 95% by weight of an aromatic polycarbonate; the present invention relates to a composition comprising, by weight, b) 2-15% of a copper-chromium spinel laser direct structuring additive, c) 0.05-5% of a flame retardant comprising a flame retardant salt or an organic flame retardant, d) 0.1-2% of an acid-modified polymer, e) 0-5% of a siloxane-based rubber. The invention also relates to a molded article comprising said thermoplastic composition, to a method for producing a circuit carrier using said molded article, and to a circuit carrier obtained by said method.

The invention relates to the technical field of electrical contact wires, in particular to a preparation method of a chromium-zirconium-copper wire for a rivet electrical contact, which comprises the following steps: S1, non-vacuum melting; s2, casting; s3, hot extrusion; s4, cold rolling and solid solution treatment; s5, drawing and aging; s6, carrying out online annealing; the chromium-zirconium-copper alloy has good electrical conductivity and thermal conductivity, high strength, good wear resistance and high softening temperature. The chromium-zirconium-copper alloy serves as an electrical contact material, high cost of an Ag-based material is avoided, the strength, the softening temperature and the abrasion resistance of a Cu-based material are improved, and compared with a traditional preparation process of a chromium-zirconium-copper wire, the preparation method has the advantages of being high in production efficiency, stable in quality, capable of achieving continuous operation, capable of achieving large-scale production and the like.

The utility model discloses glass with high compression resistance, which relates to the technical field of glass and comprises composite glass and mounting protection components arranged on two sides of the composite glass, and each mounting protection component comprises a concave support plate and a rubber strip pad fixedly connected to one side of the inner wall of the concave support plate. A plurality of sets of first springs are fixedly connected to the inner wall of the side, away from the rubber strip pad, of the concave supporting plate, a plurality of sets of buffering parts are arranged on the inner wall of the bottom of the concave supporting plate, a long bottom plate is arranged at the upper ends of the buffering parts, and the composite glass comprises two sets of pressure-resistant glass bodies. By means of the arrangement, a user can conveniently mount and dismount the glass, the working efficiency is improved, the problem that traditional glass is generally fixed through glue dripping sealing in the mounting process is solved, the composite glass is protected in a buffering mode through mounting of the two mounting protection assemblies, the composite glass is prevented from being damaged due to the fact that the composite glass is affected by large external force, and the service life of the composite glass is prolonged. The practicability of the device is improved.

The invention discloses a transparent sapphire ceramic connecting method based on glass solder, and belongs to the technical field of welding. The method comprises the following steps: preparing glass solder powder from two pieces of sapphire ceramics to be welded according to a route of ball milling, drying, founding, water quenching, ball milling, drying and sieving, pressing the glass solder powder into sheets, and presintering and densifying; placing the glass solder piece between the two pieces of to-be-welded ceramic for assembly; the assembled sample is put into a muffle furnace to be heated to the welding temperature, and rapid cooling is conducted after heat preservation is conducted for a certain time; and the cooled connector is placed in the muffle furnace again for annealing, and then the whole connecting process is completed. The glass solder comprises the following components in percentage by weight: 30%-40% of RE2O3, 5%-10% of Al2O3, 30%-40% of SiO2, 10%-20% of B2O3, 5%-10% of BaO and 5%-10% of K2O. According to the method, the sapphire ceramic joint with high strength and high light transmittance can be obtained.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a heat-resistant polylactic acid-based degradable photo frame material and a preparation method thereof. The preparation method comprises the following steps: S1, preparing modified lignin by taking lignin and bromododecane as raw materials, then preparing benzene ring-containing polylactic acid by taking the modified lignin and D-lactide as raw materials, and finally performing surface grafting treatment on the benzene ring-containing polylactic acid to obtain modified polylactic resin; s2, adding the modified polylactic resin, poly (butylene succinate), talcum powder, an auxiliary agent and an antioxidant into a stirring kettle, and heating and stirring to obtain a mixture; and S3, carrying out extrusion molding on the mixture, and cooling to obtain the heat-resistant polylactic acid-based degradable photo frame material. Through the synergistic effect of the components, the composite material is ensured to have good heat resistance, and the impact strength is remarkably improved.

The present invention discloses a SOFC or SOEC with a long-life sealing interface and a preparation method thereof, and belongs to the field of fuel cell technology. The sealing interface of SOFC or SOEC is formed by the contact between a sealing layer, a battery cell, and a metal connector. The present invention adopts spinel as a coating material for the metal connector, and adopts a staged heat treatment to form a spinel coating with high density and strong adhesion to improve the durability and overall performance of the metal connector; the present invention also optimizes the sealing layer material system, that is, the sealing layer is prepared by using a SiO2-MgO-Al2O3-SrO-V2O5 system, which not only improves the resistivity of the sealing layer, but also improves its hardness and fracture strength, and at the same time, the thermal expansion coefficient of the sealing layer is matched with the thermal expansion coefficient of the metal connector and the battery cell under the premise of ensuring airtightness, thereby improving the durability of the sealing interface and making it have a long life.

The invention provides an electromagnetic rail gun armature capable of reducing aluminum adhesion and a surface modification method, belonging to the field of electromagnetic rail guns. The armature surface of the invention has a modified film, the modified film has positive mixing heat with the copper alloy material of the electromagnetic rail, has conductive properties, and has a higher softening temperature and surface hardness than the Al alloy matrix material of the armature itself. The modified film is a pure tungsten film, a pure silver film, a titanium alloy film, a TiC alloy film, a tungsten stainless steel film or / and a chromium stainless steel film, the modified film thickness is 800nm-8μm, and the modified film presents a columnar crystal structure. The modified film is prepared on the armature surface by magnetron sputtering. The power of magnetron sputtering is 30W-200W, the temperature of the armature surface is 298K-423K, the sputtering time is 30min-300min, and the protective gas is argon. The invention can effectively reduce the aluminum alloy adhesion problem caused by melt deposition during the electromagnetic gun armature launch process by preparing the modified film on the armature surface.

The invention relates to the technical field of brake pad friction materials, in particular to a high-temperature-resistant brake pad friction material which comprises the following components in parts by mass: 6-10 parts of matrix phenolic resin, 10-15 parts of a secondary composite binder, 15-20 parts of plant fibers, 8-12 parts of sepiolite powder, 15-20 parts of filler and 8-12 parts of a friction performance regulator. According to the high-temperature-resistant brake pad friction material, the material preparation uniformity is creatively improved through the granulation technology, a surface bonding structure can be introduced into the friction material through the secondary composite binder, the overall melting point is higher than that of phenolic resin, and evenly-distributed metal sulfide can be generated under the high-temperature condition; therefore, the overall high-temperature resistance of the friction material is improved, the softening temperature of the friction material is increased, the long-acting and stable friction coefficient is obtained, and the heat fading problem is solved.

The present invention relates to the technical field of heating wire preparation, and specifically to a copper-tin alloy heating wire and a preparation method thereof, wherein the copper-tin alloy heating wire comprises raw materials including: 1.5wt%-2.0wt% tin, 0.1wt%-0.3wt% silver, 0.03wt%-0.05wt% zinc, 0.05wt%-0.1wt% lanthanum, and the remainder is copper and unavoidable impurities. The present invention can obtain a copper-tin alloy heating wire with high tensile strength and excellent bending resistance even when the upper continuous casting method is adopted through the mutual coordination of various elements. The copper-tin alloy heating wire prepared by the present invention has the advantages of high purity, fine grain structure, good high temperature resistance, stable conductivity, etc., and the tensile strength is ≥800MPa, the oxygen content is ≤3ppm, and the number of repeated bendings without breaking is ≥10 times.

The invention relates to the technical field of liquid crystal panels, in particular to a glass tube for a UVA ultraviolet fluorescent lamp used in a liquid crystal alignment process and its application. The components and mass fractions of the glass tube for the UVA ultraviolet fluorescent lamp are specifically as follows: SiO2 86.938% to 92.938%, CaO 0.035%, Na2O 4.263% to 7.263%, Al2O3 2.433% to 4.433%, K2O 0.497% to 0.997%, P2O5 0.070%, SO3 0.060%, Fe2O3 0.064% to 0.144%, TiO2 0.071%, Cl 0.081% to 0.281%, ZrO2 0.094%, and ZnO 0.004%. The glass tube of the invention can produce a T12UVA ultraviolet fluorescent lamp suitable for liquid crystal light alignment, and the manufactured ultraviolet fluorescent lamp has better light decay characteristics and lifespan.