24 results about "Thermal aging" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The application particularly relates to a cast stainless steel multiaxial low-cycle fatigue prediction method, which comprises the following steps: measuring or calculating the axial strain amplitude and the corresponding axial stress, the shear strain amplitude and the corresponding shear stress, and the phase difference between the axial strain amplitude and the shear strain amplitude of a cast stainless steel concerned part; calculating the equivalent axial strain amplitude and the equivalent shear strain amplitude of the cast stainless steel concerned part after correction and containing the influence of thermal aging; and substituting the equivalent axial strain amplitude and the equivalent shear strain amplitude of the cast stainless steel concerned part after correction and containing the influence of thermal aging and the phase difference therebetween into a cast stainless steel multiaxial low-cycle fatigue prediction model containing the influence of thermal aging to calculate the multiaxial low-cycle fatigue life and the fatigue crack direction of the cast stainless steel after thermal aging. The cast stainless steel multiaxial low-cycle fatigue prediction method can accurately predict the fatigue life of the cast stainless steel under multiaxial low-cycle fatigue loading and the direction of fatigue crack initiation and initial propagation.

A busbar covered with a cladding layer and a cladding method thereof. The busbar comprises a metal conductor base and a composite insulating layer formed on the surface of the metal conductor base by a reactive co-extrusion process; the composite insulating layer comprises a polyethylene-based adhesive inner layer in direct contact with the metal conductor base; the raw materials for preparing the polyethylene-based adhesive inner layer comprise, by weight fraction, PA12 75%-85%, antioxidant 0.1%-1%, anti-UV additive 0.1%-2%, color powder 0.5%-5%, and special additive 5%-20%. Through the synergy of material end group design and reactive co-extrusion process, a stable chemical bonding network is constructed in situ at the interface while continuously producing rapidly, which greatly improves the interlayer bonding force, heat aging resistance and long-term reliability of the cladding layer, and is particularly suitable for high-voltage battery systems of new energy vehicles with extremely high requirements for insulation and durability.

The application relates to the technical field of cables and discloses an anti-cracking low-smoke halogen-free flame-retardant cable based on a double-layer functional gradient material, which comprises a cable core, a metal armor layer and an outer sheath located outside the metal armor layer. The outer sheath is a double-layer co-extrusion structure and comprises a first sheath layer and a second sheath layer; the first sheath layer is a low-smoke halogen-free flame-retardant polyolefin sheath material meeting the performance requirements of the code ST8 in IEC 60502-2:2024, the second sheath layer is a low-smoke halogen-free flame-retardant polyolefin sheath material meeting the performance requirements of the code ST12 in IEC 60502-2:2024, delta 1 is 0.3 mm-4.5 mm, delta 2 is 0.3 mm-4.5 mm, and delta 1+delta 2 is 0.6 mm-7.5 mm. The cable takes into account the flame-retardant continuity, anti-cracking performance and mechanical maintenance performance after thermal aging.

The application relates to the technical field of cables, and discloses a high-strength aluminum alloy medium-voltage power cable. The high-strength aluminum alloy medium-voltage power cable comprises, from inside to outside, an aluminum alloy conductor and an insulation layer; the insulation layer is a cross-linked polyethylene nano-composite insulation material, and the raw material components of the cross-linked polyethylene nano-composite insulation material comprise, in terms of weight fractions, 100 parts of a base resin, 3-8 parts of core-shell-star compounded inorganic nano-filler, 0.5-1 part of an antioxidant and 1.5-2.5 parts of a cross-linking agent; the core-shell-star compounded inorganic nano-filler is silica-coated nano-aluminum nitride grafted with polyhedral oligomeric silsesquioxane, and is denoted as AlN@SiO2-POSS. In the application, the inorganic nano-composite filler is used to improve the thermal conductivity of the cable insulation layer, and meanwhile, the dielectric strength, mechanical tensile property and heat aging resistance of the cable are improved.

The application discloses a high-temperature-resistant and porcelainizable silicon resin composite material and a preparation method thereof, and belongs to the technical field of organic polymer materials. The silicon resin composite material is modified by polydopamine modified boron carbide and two kinds of low-melting-point glass powder, and the gradient synergy of the polydopamine modified boron carbide and the two kinds of low-melting-point glass powder can make the silicon resin composite material generate phase transition from a silicon dioxide phase to a B2SiO5 phase and then to a Mg2SiO4 phase in a high-temperature thermal aging process, and the B2SiO5 phase and the Mg2SiO4 phase can form a B2SiO5-Mg2SiO4 ceramic network, which, in cooperation with SiC, endows the composite material with excellent high-temperature mechanical properties. The silicon resin composite material provided by the application can generate phase transition at high temperature, the mechanical properties are significantly improved, good processing performance and mechanical strength are maintained, and the silicon resin composite material is suitable for high-performance structural parts and other composite material products in the field of aerospace.

The application discloses a rare earth high-weatherability PPR pipe and a production method thereof, and comprises the following steps: raw material pretreatment, premix preparation, extrusion molding, inner and outer spray cooling and shaping, cutting and spraying. The rare earth high-weatherability PPR pipe improves performance through the synergistic effect of a rare earth composite stabilizer, titanium white and carbon black. The rare earth composite stabilizer captures free radicals, and forms a triple protection system with the titanium white and the carbon black, thereby significantly enhancing weatherability. The titanium white reduces interface defects through coating and forms complementation with the carbon black. The rare earth cooperates with the titanium white to prolong oxidation induction time and thermal aging life. The carbon black also improves antistatic property. The cooperation of the additives optimizes dispersion, ensures that the pipe tensile strength and elongation at break reach standards, and takes into account weatherability and mechanical property.

This invention relates to the field of chlorinated polyvinyl chloride (PVC) technology, specifically to a high Vicat softening temperature, high-temperature resistant CPVC pipe and its preparation method. The pipe is obtained by extrusion and heat treatment of a composition containing a specific core-shell type heat-resistant and impact-resistant modifier. The modifier has a multi-layered shell structure with cross-linked polybutyl acrylate as the core and containing gradient-distributed epoxy functional groups. The preparation method includes a stepwise mixing of raw materials and an extrusion process that controls the short residence time of the melt. This invention significantly improves the Vicat softening temperature of the pipe while also achieving excellent impact resistance, internal pressure thermal stability, and long-term thermal aging performance.

A columnar thermal protective coating reinforced with micron-sized porous particles and its preparation method are disclosed, belonging to the field of chemical materials. The method involves preparing a nanoscale columnar structure by injecting a suspension of material into plasma using ASPS on a preheated metal substrate. Micron-sized porous particles are then embedded into the nanoscale columnar structure via radial powder feeding to form a columnar thermal protective coating reinforced with these particles. The nanoscale columnar structure provides a strong and robust matrix for the coating system, while the encapsulated micron-sized porous particles effectively reduce the tendency for sintering and densification during service, ensuring the coating maintains excellent thermal insulation performance and achieving synergistic performance optimization. This invention effectively alleviates the degradation of the microstructure, thermal insulation capacity, and mechanical properties of traditional SPS coatings during high-temperature service due to thermal aging, improving high-temperature sintering resistance and thermal insulation performance.

The utility model relates to stress relief technical field especially relates to a kind of aluminium veneer welding stress relief vibration table.The utility model provides such a kind of aluminium veneer welding stress relief vibration table, including support seat, support, placement plate, exciter, vibration detector and vibration sensor etc., six support seats are symmetrically distributed, six support seat top are all fixedly connected with same support, two rectangular holes are set up on support, support top is fixedly connected with placement plate, several oval holes are set up on placement plate, exciter is installed in placement plate top left rear side, vibration detector is installed in placement plate top right front side, vibration sensor is installed on vibration detector.The utility model is replaced by vibration aging with traditional thermal aging, without high-temperature heating, energy consumption is greatly reduced, and processing time is shortened to within 30 minutes, greatly improve production efficiency, avoid the deformation, oxidation or mechanical property drop problem caused by high temperature of aluminium veneer, especially applicable to sheet and high-precision component.

This invention relates to the field of rubber technology, specifically to a rubber sealing strip and its preparation method. The rubber sealing strip, by weight, comprises the following components: 50-70 parts EPDM rubber, 30-50 parts nitrile rubber, 15-25 parts core-shell composite filler, 5-10 parts carbon black, 3-8 parts modified boron nitride nanosheets, 1.5-3 parts peroxide vulcanizing agent, 1-2 parts co-crosslinking agent, 1-2 parts antioxidant, and 1-3 parts lubricant; wherein the core-shell composite filler is a composite material with porous nano-silica as the core, an organosiloxane network, and embedded nano-tungsten disulfide as the shell. The rubber sealing strip provided by this invention solves the problems of insufficient mechanical properties, wear resistance, and thermal stability, as well as poor filler dispersion in traditional rubber sealing strips; it improves the tensile strength, wear resistance, and heat aging resistance of the rubber.

The application relates to the technical field of polyether ether ketone film processing, in particular to a polyether ether ketone film for high-temperature equipment in the semiconductor industry and a preparation method thereof, which is prepared from the following raw materials in parts by weight: polyether ether ketone resin 100 parts, two-dimensional boron nitride nanosheet 2-5 parts, low-molecular-weight PEEK copolymer 5-8 parts, perfluoropolyether silane coupling agent 1-3 parts, high-temperature-resistant antioxidant 1-2 parts and nucleating agent 0.1-0.3 parts. The two problems of thickness uniformity control and high-temperature thermal aging are solved synchronously through the above-mentioned formula, so that the polyether ether ketone film has both precise forming capacity and long-term thermal stability.

The application belongs to the technical field of ceramics and relates to a low-temperature aging-resistant zirconia ceramic as well as a preparation method and application thereof. Before sintering treatment of a zirconia ceramic body, a vacuum evaporation plating technology is used to form an evaporation layer on the surface of the zirconia ceramic body, and then sintering treatment is performed, so that a zirconia ceramic with a yttrium oxide protective layer is finally obtained; the evaporation layer is a metal yttrium layer or a yttrium oxide layer, and the thickness of the evaporation layer is greater than or equal to 1 nm. Through the evaporation plating technology, a nanoscale yttrium oxide shell layer with a controllable thickness and a dense structure is formed on the outer layer of the zirconia ceramic, and in a hydrothermal aging environment, the dense shell layer can effectively block the erosion of water on yttrium elements in the zirconia matrix, thereby significantly inhibiting the occurrence of low-temperature aging phase change and greatly improving the long-term stability and service life of the zirconia ceramic material.

The present application relates to the technical field of light building materials, in particular to a long-acting antibacterial and mildew-proof ceramic tile adhesive and a preparation process thereof. The present application overcomes the problems of poor tensile bonding strength, poor anti-sliding property and lack of long-term antibacterial and mildew-proof property of traditional inorganic adhesives. A cross-linking network is constructed by a magnesium phosphate inorganic framework, a modified emulsion and tackifying resin, and combined with antibacterial and mildew-proof materials and hydrophobic closed-void aggregate. The adhesive not only has excellent anti-sliding property and transverse deformation property, but also blocks water penetration through a dense hydrophobic structure, realizes intelligent slow release of metal ions and heat aging resistance, has good long-acting antibacterial property, zero-level mildew-proof property and light thermal insulation property, and the adhesive meets the performance requirements of adhesive in the JC / T 547-2017 standard.

This utility model provides a surge arrester that effectively prevents current leakage and short circuits through a multi-insulation design of insulating sleeves, alkali-free glass fiber tape, and vulcanized silicone rubber sheds, ensuring stable operation of the surge arrester in harsh environments and extending its service life. Simultaneously, the design of heat dissipation jackets, heat dissipation channels, heat dissipation holes, and the formation of a heat dissipation cavity creates an excellent heat conduction path. This allows the internal heat generated by the surge arrester core to be quickly conducted to the heat dissipation jacket via the alkali-free glass fiber tape, and then conducted to the heat dissipation holes through the heat dissipation channels. This significantly shortens the heat transfer distance, enabling the internal heat to dissipate quickly to the external environment, effectively improving heat dissipation efficiency. It also prevents the insulation performance degradation caused by prolonged high temperatures accelerating the thermal aging of the vulcanized silicone rubber sheds and insulating sleeves, ensuring the performance stability of the surge arrester core, further extending the surge arrester's service life, reducing operating costs, and improving safety.

This invention discloses a waterproof, pressure-resistant, and reliably insulated submarine cable and its preparation method, relating to the field of cable technology. The preparation method specifically includes the following steps: S1: Extruding pressure-resistant insulating material onto a conductive core and heat-treating it to form a pressure-resistant insulating layer; S2: Wrapping an aluminum-plastic composite tape around the pressure-resistant insulating layer to form a shielding layer; S3: Winding a steel tape onto the shielding layer to form an armor layer; S4: Extruding a waterproof reinforcing material onto the armor layer and heat-treating it to form a waterproof reinforcing layer, thus obtaining a waterproof, pressure-resistant, and reliably insulated submarine cable. The submarine cable prepared by this invention possesses excellent waterproof and pressure-resistant insulation properties through the pressure-resistant insulating layer and the waterproof reinforcing layer. It also exhibits excellent mechanical and thermal aging resistance properties, enabling it to adapt to harsh underwater working environments and greatly ensuring the stable and reliable operation of the submarine cable, which is of great significance.

The present application relates to the technical field of sealing, in particular to a kind of silicone rubber seal and preparation method thereof.The present application overcomes the problems of poor sealing performance and poor heat aging resistance of silicone rubber seal.By controlling the adding batch of raw materials, forming stable chemical bond by radiation grafting, filler reinforcement, degassing and vulcanization to build dense structure, crosslinking agent and chain extender are used to balance performance, silicone oil is used to optimize the surface of seal, and polar bonding, polyamide hot melt bonding and other methods are used to improve the bonding strength with the metal to be sealed;By increasing the filler, modifying the base material, and adding chain extender to form a crosslinked network, the conditions of the preparation process are optimized, so that the silicone rubber seal has good aging resistance and sealing effect.

The application relates to the technical field of building waterproofing, and discloses a composition for non-cured rubber asphalt waterproofing paint, non-cured rubber asphalt waterproofing paint, a preparation method and application thereof. The composition contains bitumen I, SBS, SBR, a composite filler and a modifier; the composite filler is a combination of nano-silicon dioxide, nano-calcium carbonate and slag powder in a content mass ratio of 1:0.5-2:2.5-12; a raw material composition A for forming the modifier contains bitumen II, modified fibers, white mud and fly ash; the non-cured rubber asphalt waterproofing paint provided by the application has excellent low-temperature bending property, heat aging property, high-temperature anti-flowing property and bonding strength, and the utilization rate of solid waste is significantly improved, and the cost is reduced.

This invention discloses a modified asphalt with targeted regulation of wax crystallization and its preparation method, relating to the field of asphalt, and involves the preparation of matrix asphalt; purification of diatomaceous earth to obtain purified diatomaceous earth; heating random polypropylene to a molten state in an oven, then pouring it into a high-speed shear mill, adding a hindered amine light stabilizer, shearing it uniformly, and then incorporating random copolymer polypropylene, shearing it uniformly to obtain blended modified random polypropylene; the modified asphalt of this invention, through the synergistic design of materials and processes, simultaneously achieves multiple functions such as anti-photooxidation, inhibition of reversible thermal aging, and improvement of low-temperature impact resistance and cold resistance, breaking through the performance bottleneck of traditional modified asphalt in cold-region applications.

The application provides a gas-sensitive material surface passivation method based on fluorination and heat aging synergistic treatment and application of passivation material, and belongs to the technical field of material preparation. The method provided by the application comprises the following steps: performing a heat aging reaction on the gas-sensitive material, and determining an active defect generation rule of the gas-sensitive material in the heat aging reaction; determining a plurality of target stages in the heat aging reaction according to the active defect generation rule; and performing a gas phase fluorination reaction on the gas-sensitive material in each target stage of the plurality of target stages respectively, so as to obtain a passivation material. The gas-sensitive material surface passivation method based on fluorination and heat aging synergistic treatment and the application of the passivation material provided by the application are used to improve the service life and stability of the gas-sensitive material.

This invention discloses a method for assessing the aging of transformer insulation paper based on furfural and the beluga algorithm, comprising the following steps: (1) non-uniform accelerated thermal aging experiment; (2) multi-dimensional feature data acquisition; (3) constructing an IBWO-MLP prediction model to predict the degree of polymerization of insulation paper in hot spot areas; (4) establishing a field-based DP estimation model to predict the degree of polymerization of insulation paper in hot spot areas; (5) aging status assessment and lifetime prediction: outputting the remaining lifetime prediction results of insulation paper at transformer hot spots. This invention's method can accurately assess the aging degree of insulation paper in transformer hot spot areas under uninterrupted power supply conditions, with high accuracy and strong applicability, which helps in the early diagnosis of insulation faults.

This utility model discloses a magnetoelectric speed sensor for monitoring engine speed, including a housing and a body installed inside the housing. A probe body is disposed inside the body, and a probe base is disposed on the rear side of the housing. Connecting lines are disposed on the rear outer wall of the probe base near both the left and right sides. Multiple bonding pieces are equidistantly disposed on the circular outer wall of the body, and a heat-conducting rod is fixedly connected to one end of each bonding piece. Multiple heat dissipation columns are disposed inside the circular outer wall of the housing. By installing the bonding pieces, heat-conducting rod, and heat dissipation columns, the heat dissipation columns dissipate heat to the outside of the housing, effectively reducing the body temperature and minimizing thermal aging of electronic components caused by prolonged exposure to high temperatures. This ensures the stable performance of electronic components and guarantees that the signal processing circuit can accurately amplify, filter, and shape the sensed signal.

This invention relates to the field of cable technology and proposes a heat-resistant overhead insulated cable and its manufacturing process. The heat-resistant overhead insulated cable includes a conductor, a shielding layer, and an insulation layer arranged sequentially from the inside out. The insulation layer comprises the following components by weight: 100 parts polyvinyl chloride, 5-8 parts chlorinated polyethylene, 30-40 parts plasticizer, 4-5 parts stabilizer, 10-15 parts filler, 1-3 parts antioxidant, 2-4 parts lubricant, and 8-10 parts phenylmaleimide compound. The phenylmaleimide compound is composed of 2,4,6-trichlorophenylmaleimide and N-phenylmaleimide in a mass ratio of 1:1.5-2. The heat-resistant overhead insulated cable provided by this invention solves the technical problems of insufficient heat resistance, easy softening and deformation at high temperatures, low mechanical property retention after long-term thermal aging, and easy brittle fracture in existing overhead insulated cables.