14results about How to "Extended operating temperature range" patented technology

The invention discloses an electrolyte of an aqueous zinc-iodine battery, and relates to the technical field of zinc-iodine batteries, the electrolyte is prepared from an I + stabilizer, a hydrogen bond ligand, a low-freezing-point hydrogen donor solvent and a zinc salt, and the molar ratio of the I + stabilizer to the hydrogen bond ligand to the low-freezing-point hydrogen donor solvent to the zinc salt is 1: 0.5: 5: 0.5-1.5. The invention also provides a preparation method of the electrolyte and a zinc-iodine battery prepared by using the electrolyte. The zinc-iodine battery constructed by the invention can realize highly reversible I- / I2 / I + conversion and rapid iodide conversion kinetics in a wide temperature range of-25 DEG C to 40 DEG C, and has high energy density and excellent long cycle stability. In addition, due to the unique solvation structure of the electrolyte, the activity of water molecules in the system is reduced, and then the hydrogen evolution reaction and other side reactions are inhibited. Therefore, the invention provides a feasible strategy for realizing wide temperature range, high capacity and high performance of the zinc-iodine battery.

The invention provides a preparation method of a special aluminum electrolytic capacitor for a low-temperature-resistant detonator trigger, and the method comprises the following steps: cutting a positive electrode foil and a negative electrode foil, and riveting the cut positive electrode foil and negative electrode foil with a positive guide pin and a negative guide pin; placing electrolytic paper between the riveted positive electrode foil and negative electrode foil, winding the electrolytic paper to form a core package, injecting electrolyte into the core package, and sealing the core package in an aluminum shell by using colloidal particles to obtain a semi-finished capacitor; and cleaning the semi-finished product capacitor, sleeving, and sequentially carrying out primary aging sorting, secondary aging sorting, appearance observation and inspection to obtain the capacitor. The preparation method of the aluminum electrolytic capacitor special for the low-temperature-resistant detonator trigger is simple in production process, common in material and low in price, and the prepared aluminum electrolytic capacitor is excellent in electrical performance, wide in working temperature range and small in size.

The invention belongs to the technical field of polyurethane materials, and particularly relates to a compression-resistant and shear-resistant polyurethane material for an expressway bridge support and a preparation method of the compression-resistant and shear-resistant polyurethane material. The water-based polyurethane resin is prepared from a component A and a component B, the component A comprises polyether glycol, a micromolecular chain extender, an anti-hydrolysis agent, a catalyst and an inorganic filler, the component B comprises polyether triol, polyether glycol and diisocyanate, and the polyether glycol is polytetrahydrofuran ether glycol with the number-average molecular weight of 2000g / mol; the polyether trihydric alcohol is polyether trihydric alcohol with the number-average molecular weight of 494 g / mol, and the polyether trihydric alcohol is prepared through a reaction of trimethylolpropane and tetrahydrofuran. According to the invention, polyether triol prepared by reaction of trimethylolpropane and tetrahydrofuran is used as a raw material of the component B, so that the pressure resistance and crystallization resistance of the material can be improved while better shear modulus, mechanical strength, low-temperature flexibility and hydrolysis resistance of the traditional PTMG type polyether are maintained, the use temperature range is enlarged, and the service life of the material is prolonged.

The invention relates to the technical field of ceramic tile glaze, in particular to digital glaze and a preparation method thereof, and a fine matte super-wear-resistant marble ceramic tile and a preparation method thereof. The invention discloses digital glaze which comprises the following raw materials in parts by weight: 35-45 parts of digital powder, 35-55 parts of a solvent, 5-12 parts of a dispersing agent and 5-12 parts of an auxiliary agent, every 100 parts of digital powder comprises the following raw materials in parts by weight: 35 parts of potassium feldspar, 17 parts of modified quartz, 18 parts of dolomite, 7 parts of corundum, 3 parts of calcined alumina, 7 parts of kaolin, 3 parts of zinc oxide and 10 parts of wear-resistant frit. The digital glaze has the advantages of being good in color development, fine and smooth in hand feeling, free of pinhole miliaria and good in wear resistance, and the quality of marble tile products is greatly improved.

The application discloses a kind of eutectic solvent and its preparation method and application, the eutectic solvent is used for the dissolution, separation or regeneration of cellulose and / or starch, the eutectic solvent includes first solvent, second solvent and water;The first solvent is selected from at least one of the compounds shown in formula 1.The eutectic solvent of the application has very good solubility for cellulose and / or starch, can quickly dissolve a large amount of cellulose and / or starch, is suitable for the dissolution, separation and regeneration of cellulose and / or starch, etc., and is low in cost, easy to prepare, the raw materials used are all harmless to the environment, can be recycled, is an environmentally friendly solvent system.

The present invention relates to a liquid crystal composition. The liquid crystal composition comprises four compounds having different structural formulas and a chiral compound. The four compounds having different structural formulas are at least one compound selected from general formula I, at least one compound selected from general formula II, at least one compound selected from general formula III, and at least one compound selected from general formula IV, respectively. By optimizing the content of each component in the liquid crystal composition, a clearing point is improved while reducing a phase transition point of the N-TB. Also provided is a bistable liquid crystal dimming device prepared by applying the liquid crystal composition, which widens the working temperature range of the bistable liquid crystal dimming device, and improves the value of the bistable liquid crystal dimming device in practical applications.

A stator sheet (110) for a stator (100) of a rotary electric machine (200) is described, in which the stator sheet (110) has a yoke region (111) with a radially inner edge (1110) and a radially outer edge (1111), and in which a plurality of first recesses (1112) are provided in an outer region of the yoke region (111) along the radially outer edge (1111). Here, the first recess (1112) has a radially outer boundary (1116), which has a curvature in the same direction as the radially outer edge (1111), and a connecting strip (1114) is formed between the first recess (1112) and the radially outer edge (1111), which connecting strip can be elastically deformed in the radial direction to interact with a mounting surface (113a) of the stator housing (113) and exert an elastic action.

The invention discloses an airtight, cold-resistant, low-smoke, flame-retardant, low-voltage power cable for use in an explosive environment, and relates to the technical field of power cables. The cable comprises a central conductor, wherein the outer side of the central conductor is tightly coated with an internal insulation, and the outer sides of a plurality of the internal insulations are jointly coated with an insulating inner sheath, the outer side of the insulating inner sheath is tightly wound with an internal wrapping tape, the outer side of the internal wrapping tape is tightly sleeved with a steel belt armor, and the outer side of the steel belt armor is tightly wrapped with an external wrapping tape. The invention effectively avoids the cable from dissipating heat too quickly in a low-temperature environment and affecting the normal use of the cable, and when the external temperature of the cable is high, the internal telescopic soft bag expands to fill the internal cavity of a limit fan-shaped box, which can accelerate the heat dissipation process of the cable, so that the cable can be kept within a suitable range in a high-temperature environment, ensuring that the internal temperature of the cable can remain stable when operating in low-temperature and high-temperature environments, thereby effectively providing the safety and stability of the cable.

The invention relates to the technical field of composite materials, and in particular to a composite plastic based on a PPO material and a preparation method thereof. The invention uses a polyphenylene ether having a chain-branched triazine group and polyvinyl chloride modified by a long-chain fatty acid ester as raw materials for blending, and can prepare a composite plastic with good thermal stability and plasticity; the triazine group is chain-branched on the polyphenylene ether side chain, and can significantly improve the thermal stability of the polyphenylene ether; the triazine group has excellent heat resistance and can maintain structural stability at high temperatures, so that the modified polyphenylene ether has a higher use temperature range; the introduction of the long-chain fatty acid ester can further improve the performance of the polyvinyl chloride at high temperatures; the prepared composite plastic can have good thermal stability through the combination of the two; the flexible characteristics of the long-chain fatty acid ester can adjust the toughness of the composite plastic, and combined with the rigidity of the modified polyphenylene ether, the rigidity and toughness of the composite plastic can be better balanced.

This invention provides a liquid crystal composition comprising 40%–70% component I, 0%–20% component II, 0%–20% component III, 5%–40% component IV, and 0%–30% component V. This liquid crystal composition exhibits a high clearing point and low rotational viscosity, which is beneficial for increasing the operating temperature range of the liquid crystal material and improving its response speed.

The present invention discloses a low-voltage bandgap reference voltage circuit without curvature compensation, comprising: a current source, a low-voltage loop oscillator, a charge pump, a clock amplitude converter, a voltage generator inversely proportional to absolute temperature, and a voltage generator directly proportional to absolute temperature; the current source generates a bias current; the clock signal output by the low-voltage loop oscillator is used as the input clock signal of the charge pump, and the charge pump obtains a voltage-multiplied output clock and a DC voltage, which are input into the clock amplitude converter to obtain a two-phase clock; the two-phase clock inputs a voltage generator inversely proportional to absolute temperature to obtain a voltage inversely proportional to absolute temperature; the voltage inversely proportional to absolute temperature is input into a voltage generator directly proportional to absolute temperature to obtain a reference voltage output. The present invention broadens the normal operating temperature range of the circuit and improves the power supply rejection ratio under the condition of low power supply voltage and no curvature compensation.

This invention discloses a method for measuring the attitude of a moving object based on a dual-line laser, belonging to the field of attitude measurement technology. A laser penetrates a reference laser receiving target and strikes a standard laser receiving target. One laser beam is fixedly illuminating a point on the reference laser receiving target. The line connecting the center points of the two targets is parallel to the laser beam and moves synchronously with the moving object. Coordinate systems are established at the center of the left side of both the reference and standard laser receiving targets. The coordinate values ​​of the laser illumination point in each target coordinate system are read, and the attitude angle of the moving object in space is calculated using spatial geometry. The attitude measurement method includes: measuring the yaw angle obtained by rotating the moving object around the Y-axis of the coordinate system, measuring the pitch angle obtained by rotating the moving object around the X-axis of the coordinate system, measuring the roll angle obtained by rotating the moving object around the Z-axis of the coordinate system, and calculating the coordinate value of one of the laser illumination points in the coordinate system of the standard laser receiving target (when no roll occurs).

The invention relates to a spatial light and small camera structure and thermal control function integrated design and forming method, which comprises the following steps of: after the spatial light and small camera structure design is completed, designing a heating loop and a ceramic insulating layer of the heating loop along a structure base body according to thermal control requirements, and obtaining a camera structure and thermal control function integrated design model. And then the camera structure, the ceramic insulating layer and the heating loop are fused or sintered together through a 3D printing process. The integrated design can greatly reduce the temperature gradient of the camera structure, so that the temperature control is more uniform; the heat transfer efficiency is obviously improved, and the thermal control power consumption is reduced; and the temperature control reliability can be greatly improved. The insulating layer is made of a high-thermal-conductivity and high-resistivity ceramic material, so that the selection range of a camera structure material is effectively expanded.

The invention provides a highly-integrated two-axis rotary table, and relates to the technical field of rotary tables. The rotary table comprises an orientation transmission device. The pitching transmission device comprises a power arm and a data arm which are symmetrically arranged, the pitching transmission device is arranged on the turntable device, and a high-frequency box device used for installing an antenna array plane is arranged between the power arm and the data arm; the two sides of the high-frequency box device are rotationally connected with the corresponding power arm and data arm; an outer circulation channel and an inner circulation channel are arranged in the turntable device; the inner circulation channel is provided with a refrigerating system. A complete air cooling circulation channel is formed by combining the pitching transmission device and the high-frequency box device, independent heat dissipation of the rotary table is achieved, the heat dissipation requirements of different antenna array planes and related equipment in the high-frequency box can be met, and the applicability of the rotary table is improved.