41results about How to "Improve high temperature life" patented technology

A method of fabricating a lithium secondary battery, which improves charge-discharge characteristics, lifespan, and temperature characteristics of the battery and which includes interposing a separator between a positive electrode plate and a negative electrode plate, thus manufacturing an electrode assembly; housing the electrode assembly in a battery case, introducing an additive-containing electrolytic solution, and then sealing the battery case; subjecting the sealed battery case to pre-charging, and then removing gas generated by the pre-charging; subjecting the battery case to formation; and removing gas generated by the formation, wherein the additive is one or more selected from among LiF₂BC₂O₄, 3,9-divinyl-2,4,8,10-tetraoxaspiro[5,5]undecane, LiBC(C₂O₄)₂, poly(ethyleneglycol)borate and derivatives thereof, halogen-substituted carbonate, and vinyl silane, and the pre-charging is conducted in a range of 10% or less of a battery capacity.

The invention provides an anti-agglomeration high-temperature resistant coating of a furnace bottom roller. The coating comprises a substrate, wherein the substrate includes the following components by weight: 35-63 percent of Co, 20-30 percent of Cr, 10-20 percent of Ta, 5-10 percent of Al and 2-5 percent of y. According to the invention, a metal-ceramic material is coated on a furnace bottom roller body in a spraying manner by adopting an explosion method, thus the characteristics of the surface of the furnace bottom roller body is changed, a better prevention of the agglomeration of the furnace bottom roller body is achieved, and further the high-temperature resistance of the furnace bottom roller is enhanced.

This invention relates to a method of fabricating a lithium secondary battery, which improves charge-discharge characteristics, lifespan, and temperature characteristics of the battery and which includes interposing a separator between a positive electrode plate and a negative electrode plate, thus manufacturing an electrode assembly; housing the electrode assembly in a battery case, introducing an additive-containing electrolytic solution, and then sealing the battery case; subjecting the sealed battery case to pre-charging, and then removing gas generated by the pre-charging; and subjecting the battery case to formation, wherein the additive is one or more selected from among LiF2BC2O4, 3,9-divinyl-2,4,8,10-tetraoxaspiro [5,5]undecane, LiBC(C2O4)2, poly(ethyleneglycol)borate and derivatives thereof, halogen- substituted carbonate, and vinyl silane, and the pre-charging is conducted in a range of 50-100% of a battery capacity.

Aiming to solve the problems of poor storage performance of the electrode foil and life time prolong of the capacitor, the invention provides a novel five-stage manufacturing method of low voltage electrode foil for an aluminum electrolytic capacitor, which comprises the processes of first forming, second forming, third forming, fourth forming, fifth forming, high-temperature processing, after-forming 1, after-processing, and after-forming 2. The produced low voltage electrode foil for the aluminum electrolytic capacitor has high forming effect of up to 220 percent to 260 percent, long high-temperature life, good storage performance and less electricity leakage.

The invention provides a preparation method of silver solder paste, which comprises the following steps: 1, preparing raw materials and pretreating the raw material; 2, stirring the raw materials; 3, roasting the raw materials; and 4 grinding the raw materials. The invention also provides silver solder paste prepared by the method. The silver solder paste is prepared from the following raw materials in percentage by weight: boric acid 33-38, potassium fluoborate 28-32, potassium fluoride 20-25, monomer boron 2.0-2.5 and distilled water 10-20. Compared with the prior art, the method has the advantages of stable product quality and high material utilization rate. The product has the characteristics of long soldering high-temperature life, long activity retention time, high solder wettability and high soldered joint quality.

The invention discloses negative electrode lead paste suitable for high and low temperature environments, and a preparation method thereof, and a lead-acid storage battery. The formula of the negativeelectrode plate lead paste comprises the following components in parts by weight: 100 parts of lead powder, 8-11 parts of sulfuric acid, 7-10 parts of deionized water, 0.04-0.06 part of high-strengthshort fiber, 0.1-0.2 part of lignin, 0.1-0.25 part of granular carbon black, 0.65-0.95 part of nano barium sulfate, 0.4-0.6 part of humic acid, 0.25-0.45 part of a surfactant, 2-4 parts of a carbon nanotube solution and 0.10-0.25 part of a hydrogen evolution inhibitor. According to the lead-acid storage battery produced by adopting the negative electrode plate lead paste formula, the high-temperature and low-temperature performances of the lead-acid storage battery are comprehensively improved, and the lead-acid storage battery has the advantages of long high-temperature service life and goodlow-temperature large-current discharge performance.

The invention relates to a high temperature resistant surface-insulated FeCrAl electrothermal alloy, which is characterized in that a FeCrAl electrothermal alloy matrix is provided with a high temperature resistant insulated composite alumina protective layer containing rare earth; the preparation method for the high temperature resistant surface-insulated FeCrAl electrothermal alloy comprises the following steps: firstly, cleaning the surface of a FeCrAl electrothermal alloy; secondly, putting the FeCrAl electrothermal alloy into sol-gel for soaking; and finally taking the FeCrAl electrothermal alloy out, drying and performing proper heat treatment on the FeCrAl electrothermal alloy, and obtaining a high temperature resistant surface-insulated protective layer on the surface of the FeCrAl electrothermal alloy. For the FeCrAl electrothermal alloy prepared by the method, a compact composite film is formed through high-temperature solution treatment, is well combined with the matrix, takes composite alumina as a main raw material, and is formed on the surface of the FeCrAl electrothermal alloy by rare earth micro-alloying action. The thickness of the composite film is between 5 and 10 mu m, and the composite film has surface insulation, high temperature resistance and the like.

The invention discloses low-noise lubricating grease and a preparation method thereof. The lubricating grease consists of base oil, a thickener and an additive, wherein the thickener accounts for 12-14% by weight of the base oil and the additive accounts for 1.6-2.5% by weight of the base oil. The base oil is a mixture of silicon oil, pentaerythritol, alkylbenzene and poly-alpha-olefin oil, the thickener is a mixture of paraffin, asbestos and ozocerite, and the additive is a mixture of dialkyl dithiophosphate, dodecenylsuccinic acid, zinc naphthenate, di-tert-butyl phenol and polyisobutene. The lubricating grease disclosed by the invention is simple in preparation method. By using the mixture of silicon oil, pentaerythritol, alkylbenzene and poly-alpha-olefin oil as the base oil, the lubricating grease is good in lubricating effect. By using paraffin, asbestos and ozocerite as the thickener, the noise of the lubricating grease is reduced. By adding dialkyl dithiophosphate, dodecenylsuccinic acid, zinc naphthenate, di-tert-butyl phenol and polyisobutene, the resistance to oxidation and wear resistance of the lubricating grease are improved.

The present invention provides a thermosetting resin composite material excellent in mechanical strength and wear resistance at high temperature, which is achieved by converting graphite into thin-layered one and dispersing it in a thermosetting resin homogeneously. A thermosetting resin composite material, wherein an organically modified graphite having an organic compound molecule inserted between graphite layers is mixed with a thermosetting resin, the organically modified graphite being prepared by subjecting graphite to a chemical treatment to form a graphite interlayer compound having a low-molecular substance inserted between graphite layers and subsequently immersing the resultant product in a solution of an organically modifying agent, as well as a process for producing the same. Preferably, the organically modified graphite is mixed with a thermosetting resin to be converted into thin-layered one having a layer thickness of 0.1 to 100 nm, a layer length of 100 nm to 100 μm, and an aspect ratio of 100 to 1,000,000.

The invention discloses an arylamine compound and application thereof in an organic electroluminescent device, and belongs to the technical field of semiconductors. The structure of the arylamine compound is shown as a general formula (1), arylamine serves as a basic framework of the compound, pyrene and adamantane are connected to the same phenyl in the arylamine, and due to the connection mode, the compound has the excellent hole migration capacity, membrane phase state stability and weather resistance; when the arylamine compound is used as a hole transport material of an organic electroluminescent device, the effects of improving the efficiency of the device and prolonging the service life of the device can be shown.

The invention provides a composition, an OLED device, an OLED display panel and a display device. The composition comprises 1%-99% of a partial electron transport type low-mobility metal complex material and 1%-99% of an organic electron transport material, and the electron mobility of the partial electron transport type low-mobility metal complex material is smaller than 1 * E-7cm < 2 >/Vs. According to the invention, the influence of an electric field and temperature on the electron mobility in the electron transport layer can be reduced, the balance of a carrier system in a high-temperatureenvironment is good, and the service life at a high temperature is long.

The invention relates to a modular electric heating simulation heat source for ETG. The modular electric heating simulation heat source comprises at least two stacked modules. The module comprises a module box and an electric heating unit arranged in the module box. The electric heating unit is wrapped with a heat insulation layer. The electric heating unit comprises a cladding, a coil holding threaded pipe and a resistance wire spiral coil. The coil holding threaded pipe is mounted in the cladding. The resistance wire spiral coil is installed in the coil maintaining threaded pipe, and the coil maintaining threaded pipe is provided with internal threads matched with the resistance wire spiral coil. The beneficial effects of the heat souorce are as follows: the spiral coil simulates the radioactive source for heating, it is guaranteed that the heat flow path of the electric heating unit and the heat flow path of the radioactive source fuel pellet single body are basically the same, surface temperature distribution is basically consistent, overall temperature distribution is also basically consistent, a radioactive source is replaced to test and verify the performance of the generator, early-stage research cost is greatly reduced, and the research progress is accelerated.

The invention discloses an organic electrolytic solution taking gamma-butyrolactone as a basic solvent. The organic electrolytic solution comprises a catenulate quaternaries main electrolyte, a mixedsolvent and a flame retardant additive, wherein the mixed solvent comprises the following components by weight proportion: 30-45 parts of gamma-butyrolactone, 15-25 parts of ethyl trifluoroacetate, 10-15 parts of 1,3-dioxolane-2-ketone, 10-20 parts of ethylene carbonate and 10-20 parts of methyl ethyl carbonate. The organic electrolytic solution replaces the traditional polycarbonate ammonium saltwith tetraethyl ammonium tetrafluoroborate, so that a battery has good low-temperature performance; the change of various electric parameters of the electrolytic solution is obviously small after 500h storage at 115 DEG C high temperature, so that the high-temperature service life of the electrolytic solution is long; and the methyl ethyl carbonate is added, so that the low-temperature conductivity and the low-temperature performance of the electrolytic solution can be improved.

The invention relates to the technical field of metal heat treatment, and discloses a large-diameter tungsten bar annealing device and annealing process. The annealing device comprises a first trough,a feeding device, a hydrogen protection box, an induction coil, an IGBT high-frequency induction power supply, a discharging device, a second trough, a motor, an electric control cabinet and a cooling system. The large-diameter tungsten bar annealing device and annealing process provided by the invention can achieve the effects that the internal stress of the large-diameter tungsten bar can be effectively eliminated; the phenomena of splitting, edge breakage, surface micro-cracks and the like which possibly occur in subsequent processing are avoided, the processability of the tungsten bar isimproved, the service life of consumables such as machining tools is prolonged, the service performance of the tungsten bar is improved, and the high-temperature service life of the tungsten bar is prolonged, have the advantages of being high in speed, high in quality, low in cost and convenient to maintain, can guarantee smooth implementation of industrial production, and achieve the reduction ofproduction cost and improvement of the production quality.

The invention belongs to the technical field of silicon-based ceramic core preparation, and particularly relates to a silicon-based ceramic core with excellent mechanical properties. The silicon carbide ceramic is prepared from the following raw materials in parts by weight: 30-50% of porous quartz glass powder, 10-15% of a mullite mineralizer, 18-22% of a plasticizer, 10-15% of silicon carbide whiskers, 5-10% of silicon oxide, 1-5% of metal oxide sol, 3-5% of a silicon resin enhancer and the balance of silicon carbide powder. According to the invention, a layer of metal oxide sol is pre-sprayed on the surface of the silicon-based ceramic core, the silicon resin reinforcer is permeated into the silicon-based ceramic core under a vacuum condition, and the reinforced ceramic core has excellent physical properties through silicon carbide oxidation compounding and connection support of the porous quartz glass powder as a core skeleton; the high temperature resistance, the impact resistance, the high temperature resistance, the service life and the like of the product can be improved, and the excellent ceramic core with a compact internal structure and a high-strength and high-stability carbide and nitride outer layer for toughening and reinforcing can be obtained.