877 results about "Heat stability" patented technology

The invention provides a self-assembled monomolecular layer hole transport material based on a polycarbazole derivative and a preparation method and application thereof, and the self-assembled monomolecular layer hole transport material has a structure as shown in a formula I. The self-assembled monomolecular layer hole transport material is simple in structure, high in hole transport property, strong in interface passivation ability, high in thermal stability, and suitable for large-scale application; a polycarbazole derivative is taken as a mother nucleus, an alkyl / aryl chain is taken as a linking group, phosphoric acid is taken as an anchoring group, and rigid conjugated large-plane polycarbazole with a specific structure is taken as the mother nucleus, so that molecular accumulation can be improved, and the hole transport performance of the material can be improved. By taking a phosphate group as a tail end, single-molecule self-assembly can be realized, a perovskite interface can be passivated, the energy loss at the interface is reduced, and the battery performance is improved.

The invention discloses a preparation process of a high-performance Cu-Ni-Fe alloy calculated and designed based on a first principle, and relates to the technical field of alloy material preparation. According to the process, a precise Cu-Ni-Fe ternary alloy thermodynamic database is constructed by combining a first principle with a CALPHAD method, a multivariate phase diagram is calculated based on the database to determine a component range, then optimized components of a work function, an elastic constant and a thermal expansion coefficient are calculated through the first principle, and a finished product is obtained through smelting, heat treatment and forming machining. The final alloy is composed of, by atomic percent, 30%-75% of Cu, 10%-30% of Ni and 10%-30% of Fe, the tensile strength is larger than or equal to 816.4 MPa, the total elongation at break is larger than or equal to 34.27%, the thermal expansion coefficient is smaller than 20 * 10 <-6 > / K, the excellent mechanical property and thermal stability are achieved, the problems that component design is blind and performance fluctuation is large in a traditional process are solved, and the alloy is suitable for the fields of ocean engineering, electronic packaging and the like.

The invention relates to the technical field of composite material performance prediction, and discloses a composite material flame retardant property and thermal stability prediction method based on thermogravimetric analysis and infrared spectrum data fusion. The invention aims to solve the problem that it is difficult to effectively fuse multi-modal data to realize quantitative prediction in the prior art. The method comprises the following steps: firstly, collecting thermogravimetric and infrared spectrum combined data, calculating gas transmission lag time, and carrying out forward correction on infrared spectrum data to realize time sequence alignment; then solid-phase thermogravimetric feature vectors and gas-phase infrared feature vectors are extracted, and a fusion feature matrix is generated; extracting solid-phase and gas-phase characteristics respectively by using a dual-channel LSTM network, and performing weighted fusion based on a self-attention mechanism; and finally, synchronously outputting a flame retardant index predicted value and a flame retardant grade classification result through numerical mapping and classification judgment. According to the method, multi-dimensional feature mining of the whole pyrolysis process of the material is realized, and a rapid and accurate digital evaluation means is provided for screening of the flame-retardant material.

The invention discloses an anti-oxidation and anti-scouring heat prevention and insulation composite material, a preparation method and application, and belongs to the technical field of high-temperature thermal protection materials. According to the method, a two-step in-situ modification method is adopted, hydrolyzed organosilane reacts with phenolic resin to prepare silicon modified phenolic resin, then the silicon modified phenolic resin is bonded with an organoboron compound to obtain boron-silicon co-modified phenolic resin, a curing agent is added, then the boron-silicon co-modified phenolic resin is injected into a fiber reinforcement mold, and a finished product is obtained through a sol-gel reaction and normal-pressure drying. According to the invention, boron and silicon elements are embedded into phenolic aldehyde molecular chains through covalent bonds to form a boron-silicon-carbon hybrid network, a nano ceramic phase and a compact glassy protective layer are generated at high temperature, and the coating has excellent anti-scouring property, thermal stability and heat insulation property. The preparation process is simple and controllable, is suitable for large-scale production, can accurately regulate and control the performance, and is suitable for thermal protection parts of supersonic aircrafts.

The invention relates to the technical field of metal materials, in particular to a ceramic reinforced aluminum alloy composite material and a preparation method thereof. The aluminum alloy composite material comprises the following raw materials in parts by weight: 75-85 parts of an aluminum alloy matrix and 10-20 parts of a ceramic reinforced phase, a preparation method of the ceramic reinforced phase comprises the following steps: step 1, adding silicon carbide and a silane coupling agent into absolute ethyl alcohol, and drying after ultrasonic dispersion; 2, dissolving tetraethoxysilane in an ethanol-water mixed solvent, adjusting the pH value to 3-4, adding the silicon carbide treated in the step 1, stirring to form sol, drying, converting into gel, and calcining to form a coating layer; step 3, dispersing the silicon carbide treated in the step 2 into water, adding nickel nitrate, uniformly stirring, adding a reducing agent, stirring for reaction, and collecting precipitate particles; and 4, adding an interface modifier, and uniformly mixing. The ceramic reinforced aluminum alloy composite material has high strength, high wear resistance and good mechanical property and thermal stability.

The invention discloses a method for improving the thermal stability of a gradient nanocrystalline structure, and belongs to the technical field of metal material processing. According to the method, Mg-RE series alloy is used as a matrix, a matrix alloy ingot is heated for solution treatment, surface strengthening is carried out after water quenching and cooling, a gradient nanocrystalline layer is formed on the surface layer of an alloy sample, finally, the alloy sample is transferred into an aging oven for low-temperature aging, and cooling is carried out, so that the magnesium alloy is obtained. According to the method, the thermal stability of the magnesium alloy gradient nanocrystalline is improved through a synergistic strategy of component design and low-temperature aging, so that the grain growth rate of Mg-RE alloy gradient nanocrystalline structures treated by various different surface strengthening methods in a high-temperature environment can be remarkably reduced; the core bottleneck that a traditional magnesium alloy gradient nanocrystalline material is poor in thermal stability and single in applicable surface treatment method is solved; and the process does not need special equipment, can be seamlessly connected with various existing magnesium alloy surface strengthening production lines, and is low in process cost, simple and convenient to operate and easy to industrially popularize.

The invention provides a method for prolonging the high-temperature service life of a thermal barrier coating of a hydrogen-doped gas turbine. The method comprises the steps that Ni, Co, Cr, Fe, Al, Hf, Si and Y are smelted and cast into master alloy according to the proportion; preparing the mother alloy into high-entropy alloy powder through an inert gas atomization process; high-entropy alloy powder is deposited on the surface of the high-temperature alloy substrate by adopting a high velocity oxy-fuel spraying process, and a bonding layer of the thermal barrier coating is obtained; and preparing a thermal barrier coating on the bonding layer by adopting a plasma spraying process, and carrying out vacuum heat treatment on the thermal barrier coating in advance. The high-entropy alloy bonding layer provided by the invention has better thermal stability, and can still keep strong bonding force between the ceramic layer and the bonding layer alloy after water quenching high-temperature thermal cycle service. And the transition group high-entropy alloy bonding layer is beneficial to formation of a thermal growth oxide layer, has an inhibition effect on diffusion of metal elements and coating degradation in the hydrogen-induced corrosion and high-temperature steam corrosion processes, and can prolong the high-temperature thermal shock service time of the hydrogen-doped gas turbine.

The invention belongs to the technical field of heat-conducting composite materials, and particularly relates to a high-heat-conductivity boron nitride composite film and a preparation method and application thereof. The boron nitride composite film is prepared from the following raw materials: boron nitride nanosheets serving as heat-conducting filler; the cellulose nanofiber is used as a polymer matrix; wherein the mass ratio of the boron nitride nanosheets to the cellulose nanofibers is (4: 6)-(6: 4); the average transverse size of the boron nitride nanosheet is 3-20 [mu] m, the thickness is 48-201 nm, and the aspect ratio is greater than or equal to 200. Through combination of vacuum filtration and a cold pressing process and control of the size and the use amount of the boron nitride nanosheets, high in-plane orientation and close contact of the boron nitride nanosheets in the boron nitride composite film are realized, formation of an efficient heat conduction network is facilitated, the in-plane heat conductivity of the obtained film is up to 74.97 Wm <-1 > K <-1 >, and the in-plane heat conductivity of the obtained film is up to 74.97 Wm <-1 > K <-1 >. Meanwhile, the material has high insulativity, flexibility and thermal stability, and is suitable for the field of thermal management of electronic devices.

The utility model provides an electric drive controller laser welding system which comprises a tray used for containing an electric drive controller. The conveying assembly is used for promoting the tray to move in the X-axis direction; the jacking and press-fitting assembly comprises a jacking mechanism and a press-fitting mechanism, the press-fitting mechanism is located above the jacking mechanism, the jacking mechanism is used for jacking the tray, and the press-fitting mechanism is used for press-fitting the electric drive controller on the tray; the laser emitting assembly comprises a composite laser output unit used for conducting laser welding on the electric drive controller. The detection assembly comprises a positioning detection unit, an in-welding detection unit, a laser ranging unit and a post-welding detection unit; and the composite laser output unit is arranged, high-quality welding of the electric drive controller is achieved, the risk of overvoltage and overcurrent is greatly reduced, effective heat conduction is better facilitated, the temperature rise of the electric drive controller structure is reduced, the thermal stability of a device is improved, the service life of the device is prolonged, and the bolt cost and the labor cost are reduced.

The invention relates to the technical field of heat storage, in particular to a dynamic heat storage and supply regulation and control system and method based on energy efficiency optimization. According to the method, multi-source parameters such as the server load rate, the cooling return water temperature and the heat supply side return water temperature are subjected to collaborative modeling, so that instantaneous surplus heat is converted into schedulable heat storage, the heat supply side return water temperature difference is stabilized within a target interval by releasing the stored heat and adjusting the auxiliary heat source intervention proportion in a linkage mode, and the heat supply efficiency is improved. Room temperature deviation and energy efficiency deterioration caused by heat source fluctuation are avoided, and meanwhile closed-loop correction is conducted on heat charging and discharging power, the heat supply demand range and the index weight, so that the system gradually approaches the balance point of the lowest energy consumption and the optimal thermal comfort degree in long-term operation. Therefore, on the premise that the thermal comfort of a building group is guaranteed, the waste heat utilization rate is remarkably increased, the unit heat supply energy consumption is reduced, and the problems of insufficient heat supply stability and low waste heat utilization efficiency caused by asynchronous heat supply adjustment and waste heat recovery response are effectively solved.

The invention discloses a high-thermal-stability nickel-based wrought superalloy and a preparation method thereof, belongs to the technical field of superalloys, and aims to solve the problems of poor high-temperature structure stability, narrow thermal deformation process window and the like of the existing superalloy. The high-thermal-stability nickel-based wrought superalloy is prepared from the following components in percentage by mass: 9.0 to 12.0 percent of Cr, 12.0 to 16.0 percent of Co, 6.0 to 7.5 percent of W, 2.0 to 4.0 percent of Mo, 3.6 to 4.5 percent of Al, 1.4 to 2.0 percent of Ti, 1.2 to 1.8 percent of Nb, 0.2 to 0.8 percent of V, less than or equal to 1.0 percent of Fe, 0.03 to 0.10 percent of C, 0.01 to 0.03 percent of B, 0.02 to 0.08 percent of Zr, 0.01 to 0.02 percent of Ce and the balance of Ni and other inevitable impurities. Wherein the sum of the contents of W and Mo is 8.5-11.5%, and the mass ratio of W to Mo is 2.0-3.5. The high-thermal-stability nickel-based wrought superalloy has good high-temperature structure stability and excellent high-temperature performance.

A heat-resistant insulated PVC material for communication cables comprises the following components and parts by weight: polyvinyl chloride 45-55; stabilizer 5-10; plasticizer 15-25; nitrile oxide 3-8; aluminum hydroxide 10-15; magnesium hydroxide 20-30; smoke suppressant 1-5; skin coupling agent 1-3; IPPP 10-20. The product obtained by this invention is lightweight, has good physical and mechanical properties, excellent mechanical balance, superior flame retardancy, good thermal stability, and no dripping.

The invention discloses a FeNi soft magnetic composite material based on tetrabutyl orthosilicate hydrolysis coating and a preparation method of the FeNi soft magnetic composite material. According to the method, through a controllable sol-gel process, tetrabutyl orthosilicate is hydrolyzed to generate SiO2 gel, then a uniform and ultrathin SiO2 gel layer is generated on the surface of FeNi powder in situ, and then heat treatment densification is performed to obtain the FeNi soft magnetic composite material coated with SiO2 in an insulation mode. The SiO2 insulating layer is firmly combined with the matrix metal powder, the thermal stability is good, high frequency and high resistivity are achieved, and meanwhile dilution of non-magnetic relative magnetic performance is reduced to a great extent. The final magnetic core is obtained through compression molding and annealing heat treatment, has the excellent characteristics of high effective magnetic conductivity and low high-frequency magnetic core loss, and is particularly suitable for various efficient and miniaturized power electronic devices in the MHz frequency band.

The invention relates to the technical field of alloy preparation, particularly provides a 650 DEG C high temperature resistant titanium-based composite material plate, and further provides a preparation method of the plate. The titanium-based composite material plate resistant to the high temperature of 650 DEG C, provided by the invention, is prepared from the following chemical components in percentage by mass: 6.0 percent to 7.0 percent of Al, 1.0 percent to 3.0 percent of Zr, 0.5 percent to 2.0 percent of Mo, 0.4 percent to 1.0 percent of Nb, 0.4 percent to 1.0 percent of W, 0.1 percent to 0.4 percent of Si, 0.4 percent to 0.7 percent of B, 0.01 percent to 0.10 percent of C and the balance of Ti and inevitable impurities. According to the titanium-based composite material component system provided by the invention, a vanadium element which is easy to generate interface reaction at high temperature is abandoned, and refractory metal elements such as niobium and tungsten are adopted to cooperate with a ceramic reinforced phase formed by boron, carbon and the like, so that the high-temperature performance and the thermal stability of the material are improved; meanwhile, by controlling the content of molybdenum, aluminum and other elements within a specific interval, the hot working performance of the material is remarkably improved while high strength is maintained, and the contradiction between insufficient high-temperature performance and poor hot working performance of a traditional titanium-based composite material is effectively solved.

The application discloses a phase change composite microcapsule, a rapid heat management fabric and a preparation method and application thereof. The phase change composite microcapsule with a thorn ball structure is prepared, and the attapulgite with a polarity significantly different from that of the phase change core material is introduced into the shell layer, so that the attapulgite is preferentially dispersed on the surface of the shell layer to form a super-high specific surface area heat conduction structure, and the heat conduction efficiency and the cycle stability are improved. Therefore, the microcapsule prepared by the application has good dispersibility and thermal stability, can be used for preparing a composite phase change fiber by melt spinning and woven into a fabric, realizes the unification of flexibility and high-temperature rapid heat management performance, and breaks through the limitation of low heat conduction efficiency and poor processing adaptability of traditional phase change materials.

The invention provides a glass substrate material and hard disk substrate glass formed by the glass substrate material, the glass substrate material contains 38%-63% by mole of SiO2, 12%-22% by mole of Al2O3 and 5%-32% by mole of MgO; the sum of the molar percentages of SiO2, Al2O3 and MgO is less than or equal to 100%. The glass substrate material has one of the following characteristics: i) Tg is 640-820 DEG C; ii) an elastic modulus of from 85 to 130 Gpa; iii) the Hv is in the range of 480 to 2000 kgf / mm < 2 >; and iv) the linear expansion coefficient at 30-380 DEG C is 25-64 * 10 <-7 > / k. Compared with a traditional hard disk substrate material, the glass substrate material disclosed by the invention is higher in strength and thermal stability and better in scratch resistance and wear resistance, and can meet harsh requirements of high-capacity and high-performance hard disks.

This disclosure provides an optically active nanocomposite material having a textured substrate and a multilayer optical stack comprising multiple nanosheets. The nanosheets may be chiral and composed of materials such as transition metal chalcogenides, MXenes, or nanocarbon. The optically active nanocomposite material exhibits linear birefringence (LB) and linear dichroism (LD), and optionally circular dichroism (CD). The nanocomposite material also exhibits optical asymmetry. g The factor may be greater than or equal to 1. Furthermore, the nanocomposite material exhibits thermal stability, for example, remaining stable at temperatures above or equal to about 250 °C. This disclosure also provides different methods for preparing such nanocomposite materials using a layer-by-layer self-assembly (LBL) process.

The invention discloses a flame-retardant friction electronegative material and a preparation method and application thereof.The preparation method comprises the steps that liquid metal and nano-clay are evenly mixed to obtain composite nano-particles, and the mass part ratio of the liquid metal to the nano-clay is (1-4): 1; the composite nano particles are evenly dispersed into the organic silica gel precursor solution, a liquid metal / nano clay / organic silica gel mixed solution is obtained, and the mass fraction of the composite nano particles in the liquid metal / nano clay / organic silica gel mixed solution is 1-20%; and uniformly coating a substrate with the liquid metal / nano clay / organic silica gel mixed solution, and curing at 60-80 DEG C for 5-10 hours to obtain the flame-retardant friction electronegative material on the substrate. The flame-retardant friction electronegativity material has good flame retardance and thermal stability, and the flame retardance of the organic silica gel is greatly improved through the synergistic effect of the liquid metal and the nano clay.

The invention discloses a whisker-reinforced composite porous ceramic material as well as a preparation method and application thereof, which are based on a new process of combining silicon carbide and cordierite and are combined with factors such as silicon carbide particle size and sintering conditions to really realize effective combination of low thermal expansion characteristic of cordierite and high strength characteristic of silicon carbide. The invention aims to synchronously improve the thermal shock resistance and mechanical bearing capacity of a product so as to provide a DPF filter body material with better performance. Furthermore, in order to optimize the filtering performance, mullite whiskers grow in the composite matrix in situ, and a more efficient particulate matter trapping network is constructed, so that the mechanical reliability, the thermal stability and the filtering efficiency are synergistically improved.

In some embodiments, a near-eye, near-eye display system comprises a stack of waveguides having pillars in a central, active portion of the waveguides. The active portion may include light outcoupling optical elements configured to outcouple image light from the waveguides towards the eye of a viewer. The pillars extend between and separate neighboring ones of the waveguides. The light outcoupling optical elements may include diffractive optical elements that are formed simultaneously with the pillars, for example, by imprinting or casting. The pillars are disposed on one or more major surfaces of each of the waveguides. The pillars may define a distance between two adjacent waveguides of the stack of waveguides. The pillars may be bonded to adjacent waveguides may be using one or more of the systems, methods, or devices herein. The bonding provides a high level of thermal stability to the waveguide stack, to resist deformation as temperatures change.

This invention relates to the field of zirconium-based amorphous alloy preparation technology, specifically to a phosphorus-containing bulk zirconium-based amorphous alloy and its preparation method. The general formula for the composition of this zirconium-based amorphous alloy is: (Zr... a Cu b Al c M （100‑a‑b‑c） ) 100‑x P x Where 53.5≤a≤60, 25≤b≤33.3, 7.5≤c≤10, 0.35≤x≤0.6, and a, b, c, and x are atomic ratios, and M is one or more of Fe, Co, Ni, and Nb. Phosphorus is introduced into the alloy in the form of a copper-phosphorus alloy, resulting in an amorphous fraction greater than or equal to 80%. Adding phosphorus can significantly improve the gas efficaciousness (GFA) of the matrix alloy, increasing the critical diameter for amorphous formation from 3-5 mm to 8-14 mm, and the compressive fracture strength from 1.8 GPa to 2.4 GPa. The zirconium-based amorphous alloy has a large critical diameter for amorphous formation and good thermal stability.

The invention relates to the technical field of frozen soil roadbed ventilation regulation and control, and discloses a ventilation roadbed wind collecting device which comprises a wind guide channel, a wind collecting device and a wind collecting device, and the outlet end of the wind guide channel is used for communicating with a ventilation structure in a roadbed body; the air collecting cover is rotatably arranged at the inlet end of the air guide channel around the axial direction of the air guide channel; the wind collecting cover is provided with an opening used for collecting natural wind, and the included angle between the direction of the opening and the extending direction of the roadbed body is an acute angle. Through the arrangement, the device can effectively collect natural wind from different directions, so that the air inlet efficiency of the ventilation roadbed under the variable wind direction condition is improved, and the thermal stability of the roadbed is further improved.

The invention provides an extrusion cogging method for realizing alloy surface nanocrystallization, which comprises the following steps: A) sequentially performing two-stage solution treatment and equal-diameter angular extrusion on an alloy bar, and applying alternating pulse current while performing equal-diameter angular extrusion to obtain an alloy subjected to dynamic strain aging pretreatment; b) placing the alloy subjected to dynamic strain aging pretreatment in a magnetic field, driving magnetic nanoparticles to impact the surface of the alloy by utilizing high-frequency vibration, and carrying out surface nanocrystallization; and C) placing the alloy workpiece subjected to surface nanocrystallization in a mold, and simultaneously carrying out in-situ superplastic forming and aging strengthening to obtain the formed alloy workpiece. According to the method, the dislocation density and the nano-structure thermal stability of the alloy material can be improved; the surface roughness Ra of the alloy material is effectively reduced to be smaller than or equal to 0.05 mu m, phase change is induced while in-situ superplastic forming deformation is conducted, a strengthening phase (such as gamma ') can be finer and more evenly distributed, and therefore higher strength and fatigue performance are obtained.

The application discloses a kind of superhigh temperature self-adaptive insulated cable of composite and preparation method thereof, which uses carbon nanotube fiber bundle as conductor, multiple layer aerogel-ceramic nanofiber composite felt as insulator, stress buffer layer formed by negative thermal expansion coefficient material is arranged between layers, and the outer sheath is chemical vapor infiltration SiC carbon fiber braided sleeve.The cable of the application has the advantages of ultra-light, high thermal stability, self-adaptive sealing and strong thermal shock resistance, and is suitable for extreme high temperature environment above 800 DEG C;The preparation method includes supercritical drying, pre-stretching winding and other key processes, to realize the high performance and reliability of the cable.

The application belongs to the field of new materials, and discloses a lead-free perovskite X-ray shielding composite material and a preparation method and application thereof, and comprises the following steps: mixing ANF / DMSO dispersion liquid with ethanol to obtain re-protonated ANF dispersion liquid; mixing the re-protonated ANF dispersion liquid, CsI powder and ethanol, and stirring to obtain two portions of the same CsI / ANF dispersion liquid; mixing re-protonated ANF, Cs3Bi2I9 powder and ethanol, and stirring to obtain Cs3Bi2I9 / ANF dispersion liquid; sequentially filtering the first portion of CsI / ANF dispersion liquid, the Cs3Bi2I9 / ANF dispersion liquid and the second portion of CsI / ANF dispersion liquid by using a gel-gel method, and vacuum hot-pressing to obtain a composite gradient film with a biomimetic symmetrical structure, which is used as a lead-free perovskite X-ray shielding composite material; and the application realizes continuous and efficient X-ray shielding effect, and can improve the mechanical flexibility and thermal stability of the material.

This invention relates to a design method and system for multi-principal element alloys with enhanced L12 phase dissolution temperature based on multi-scale features. The method obtains the optimal alloy composition by constructing a neural network model. This model uses the alloy composition-atomic scale descriptor L12 phase performance characteristics as input features, and the L12 phase interface fracture energy, L12 phase local thermal vibration entropy, and L12 phase interface phonon density of states overlap integral as output targets. The initial weights and thresholds of the neural network model are optimized using a genetic algorithm. The optimized weights and thresholds are then used to train the neural network model, resulting in a regression model for predicting L12 phase performance. This invention comprehensively demonstrates the enhanced thermal stability of the L12 phase from three dimensions—interface fracture resistance, atomic thermal vibration stability, and interface phonon matching—by outputting three unique physical parameters. This provides a new approach for the design of high-performance heat-resistant alloys and can be applied to the material development of hot-end components such as aero-engine turbine blades and gas turbine combustors.

The application discloses an accident-tolerant nuclear fuel cladding coating and a preparation method and application thereof, and belongs to the technical field of nuclear fuel cladding coating. The coating is a Cr-based binary alloy coating deposited on the surface of a zirconium alloy base, and is selected from Cr-Fe, Cr-V or Cr-Mo alloy coatings, wherein the content of Fe is 3-10 wt%, the content of V is 3-20 wt%, and the content of Mo is 1-5 wt%. The preparation method adopts a magnetron sputtering process, and is realized by controlling parameters such as vacuum degree, temperature, gas pressure, bias voltage and power. Through alloying, the application effectively inhibits the element interdiffusion between the coating and the zirconium alloy base at high temperature, reduces the formation of brittle intermetallic compounds and Kirkendall holes, significantly improves the thermal stability and service life of the coating under accident conditions, meanwhile, the process is mature, the coating quality is high, and the coating is suitable for surface protection of zirconium alloy fuel cladding of nuclear power stations.

Provided are aluminum 3xxx series alloy products having improved thermal and electrical stability, and methods for forming such products. Methods include DC casting a molten aluminum alloy, withdrawing the aluminum alloy from the mold to form an ingot, homogenizing the ingot at a homogenization temperature from 500 °C to 650 °C for a period of time from 1 to 5 hours. Methods include reducing the temperature to a soaking temperature from 350 °C to 550 °C and soaking the ingot for a period of time from 1 to 15 hours. Methods include hot rolling the homogenized ingot to produce a hot rolled aluminum alloy, and cold rolling the hot rolled aluminum alloy to produce to an aluminum alloy product.

The invention relates to the technical field of aluminum electrolytic capacitor processing, and discloses a branched-chain carboxylate composite high-temperature-resistant aluminum electrolytic capacitor electrolyte and a preparation method thereof. Branched-chain carboxylate ammonium salt with a specific steric hindrance structure is used as a composite main solute; the steric hindrance effect brought by the branched chain structure greatly enhances the thermal stability of carboxylate anions and ammonium ions at a high temperature, the upper limit of the working temperature of the aluminum electrolytic capacitor can be stably increased to 135 DEG C or above, and the branched chain carboxylate can still keep high dissociation degree and ion mobility at a high temperature. The high-temperature ESR of the capacitor can be remarkably reduced by combining the optimally selected high-boiling-point and medium-viscosity solvent combination, the dynamic repair of the aluminum oxide dielectric layer on the surface of the anode foil can be promoted by adding the efficient film forming accelerant, the leakage current of the capacitor at the high temperature is greatly reduced, all the additives play a complementary role around the main solute, and the service life of the capacitor is prolonged. And an efficient and stable high-temperature-resistant electrolyte system is jointly constructed.

The invention discloses a preparation method of an environment-friendly bio-based PVC (polyvinyl chloride) film. The preparation method comprises the following steps: step S01, pre-treating and modifying bio-based raw materials; s02, PVC resin environment-friendly activating treatment is carried out; step S03, precisely compounding and pre-mixing according to a compound formula; step S04, carrying out high-shear melt blending and homogenization; step S05, carrying out in-situ grafting modification on the bio-based compatilizer; step S06, carrying out melt tape casting and preliminary shaping; s07, carrying out two-way stretching modification and performance strengthening; and S08, environment-friendly post-treatment and finished product rolling are conducted. The environment-friendly stabilizing agent has the beneficial effects that pollution can be reduced from the source, resource circulation can be realized, meanwhile, the interface bonding force between a biological base and PVC and the thermal stability of a system can be greatly improved, and the problems of poor compatibility and poor effect of the environment-friendly stabilizing agent are solved; the tensile strength, the barrier property, the surface activity and the antioxidant and antibacterial properties of the film can be remarkably improved, and the film is suitable for popularization and application.