201results about How to "Improve high temperature" patented technology

The invention discloses a lithium manganese oxide material and a preparation method thereof, in particular to a high-crystallinity lithium manganese oxide material and a preparation method thereof, wherein the high-crystallinity lithium manganese oxide material is used for coating a lithium ion battery. The lithium manganese oxide material is obtained by being coated on a lithium manganese oxide precursor with the one-time crystal particle of 0.01-20mum and has the general formula of LiaMn2-b-cMbGcO4-d-eXdZe, wherein M and X are doped elements, G and Z are coating elements of which the concentration is distributed in a decreasing gradient from outside to inside, a is not less than 0.9 and is not more than 1.2, b is not less than 0 and is not more than 0.2, c is more than 0 and is not more than 0.2, d is not less than 0 and is not more than 0.2, and e is not less than 0 and is not more than 0.2. The material serves as the positive pole material of the lithium ion battery, has better normal-temperature and high-temperature cycle performance and excellent high-temperature storage performance, is simple in preparation and easy to operate, control and carry out industrial production.

The invention discloses a nematic phase liquid crystal composition comprising a compound with a first component shown as the general formula I, a compound with a second component shown as the general formula II, a compound with a third component shown as the general formula III, a compound with a fourth component shown as the general formula IV and a compound with a fifth component shown as the general formula V. The nematic phase liquid crystal composition disclosed by the invention has very low overall response time, lower voltage, high resistivity and voltage retention rate, low viscosity, short response time and proper optical anisotropy and dielectric anisotropy; after being treated at high temperature, the nematic phase liquid crystal composition still has high resistivity and excellent high temperature and ultraviolet stability, can be used for a photoelectric display with an active matrix address, and is particularly suitable for manufacturing active matrix TN-TFT (Twisted Nematic Thin Film Transistor) and IPS-TFT (In-Plane Switching Thin Film Transistor) liquid crystal display elements and liquid crystal displays which are rapid in response.

The invention discloses a liquid crystal composite containing a difluorooxymethylene bridge polar monomer compound. The liquid crystal composite comprises the following components in percentage by weight: 1%-40% of compounds shown in a general formula I, 1%-40% of compounds shown in a general formula II, 5%-70% of compounds shown in a general formula III, 1%-60% of compounds shown in a general formula IV, 0%-20% of compounds shown in a general formula V and 0%-20% of compounds shown in a general formula VI. The liquid crystal composite disclosed by the invention has the characteristics of high response speed, low driving voltage and high resistivity and voltage conservation rate, has the capability of improving the viewing angle of a liquid crystal display by heightening the pretilt angle of a liquid crystal in a display and is suitable for a fast-responsive TFT-LCD (Thin Film Transistor Liquid Crystal Display).

A vapor compression refrigerator having a refrigeration cycle (200) is disclosed. In a Rankine cycle (300), a refrigerant is circulated through a pump (310), a heater (320), an expander (330) and a condenser (220) in that order, and power is recovered by the expander 330 due to the expansion of the refrigerant from the heater (320). In a host gas cycle (500), on the other hand, the inlet of the compressor (210) can be connected from a point between the pump (310) and the heater (320) by a switching path (510) having a first restricting portion (510), the refrigerant is circulated by the compressor (210) through the heater (320) and the switching path (510) in that order, and the heater (320) exhibits the function of heating a heat generating device (10).

The invention provides a lithium ion battery electrolyte and a high-energy-density lithium ion battery using the same. The lithium ion battery electrolyte comprises a non-aqueous organic solvent, a lithium salt and additives. The additives comprise a negative electrode film-forming additive, a nitrile or ether nitrile compound, an acid anhydride compound and a lithium salt type additive. Accordingto the lithium ion battery electrolyte, 0.3-20wt% of the negative electrode film-forming additive such as vinylene carbonate and / or fluorocarbonate can form an excellent SEI film on a carbon-containing negative electrode, a silicon-containing negative electrode or a silicon carbon alloy negative electrode and the like, thereby stabilizing the negative electrode and ensuring excellent battery performance; 0.2-6.5wt% of the nitrile or ether nitrile compound, the acid anhydride compound and a combination of them can complex metal ions of a positive electrode or form a protective film on the surface of the positive electrode, thereby stabilizing the positive electrode and improving battery performance; and the 0.5-3 wt% of the lithium salt type additive in the lithium ion battery electrolytecan lower the impedance of the battery so as to improve the low temperature performance of the battery or improve the high temperature performance of the battery.

The invention discloses a polypropylene thermoplastic elastomer for an automobile safety airbag cover board; the polypropylene thermoplastic elastomer comprises 21-48% of high melt strength polypropylene (HMSPP), 10-50% of olefin polymer, 10-40% of styrenic thermoplastic elastomer and 2-15% of compatilizer by weight; a preparation method of the polypropylene thermoplastic elastomer comprises the steps as follows: adding the above components to a double-screw extruder respectively according to a proportion, melting, mixing and dispersing, setting a temperature of each section of the extruder at 230-265 DEG C, extruding and granulating to obtain the product finally. As the high melt strength polypropylene (HMSPP) is adopted as a matrix resin of the thermoplastic elastomer, and the olefin polymer and the styrenic thermoplastic elastomer are used for toughening synergistically, the prepared elastomer material has excellent high temperature and low temperature bursting properties and can meet the requirements that the automobile safety airbag cover board cannot be deformed to fly out and torn excessively during high temperature blasting (85 DEG C.) and does not generate fragments during low temperature blasting (-35 DEG C.); and therefore, the polypropylene thermoplastic elastomer can replace the conventional thermoplastic polyolefin (TPO) to apply to different types of automobile safety airbag cover boards.

A hard film formed by an arc-discharge ion-plating method, having a composition comprising metal components represented by Alx,Cr1-x-ySiy, wherein x and y are respectively atomic ratios meeting 0.45<=x<=0.75, 0<=y<=0.35, and 0.5<=x+y<1, and non-metal components represented by N1-alpha-beta-gammaBalphaCbetaOgamma, wherein alpha,beta and gamma are respectively atomic ratios meeting 0 <=alpha<=0.15, 0<=beta<=0.35, and 0.003<=gamma<=0.25, the hard film having an NaCl-type crystal structure, with a half width of 2theta at an X-ray diffraction peak corresponding to a (111) face or a (200) face being 0.5-2.0°, and the hard film containing oxygen more in grain boundaries than in crystal grains.

A nonaqueous electrolyte secondary battery, comprising a positive electrode having a positive-electrode active material layer reversibly inserting and extracting lithium ions on a positive-electrode current collector, a negative electrode having a negative-electrode active material layer reversibly inserting and extracting lithium ions on a negative-electrode current collector, and a nonaqueous electrolyte solution, wherein at least one of the positive and negative electrodes has a film on the surface and at least one of the positive electrode, the negative electrode and the nonaqueous electrolyte solution contains a nitrogen-containing cyclic compound. Such a nonaqueous electrolyte secondary battery is superior in high-temperature storage stability allowing preservation of favorable discharge rate even after high-temperature storage.

The object of the present invention is to provide a carbonaceous material for an anode of a nonaqueous electrolyte secondary battery which uses a plant-derived organic material as a raw material, has high purity so that alkali metals such as the potassium element and alkali earth metals such as the calcium element are sufficiently removed by de-mineral treatment, and has excellent discharge capacity and efficiency, a novel manufacturing method capable of efficiently mass-producing the carbonaceous material, and a lithium ion secondary battery using the carbonaceous material.The problem described above can be solved by a carbonaceous material for an anode of a nonaqueous electrolyte secondary battery obtained by carbonizing a plant-derived organic material, the atom ratio (H / C) of hydrogen atoms and carbon atoms according to elemental analysis being at most 0.1, the average particle size Dv50 being from 2 to 50 μm, the average interlayer spacing of the 002 planes determined by powder X-ray diffraction being from 0.365 nm to 0.400 nm, the potassium element content being at most 0.5 mass %, and the calcium element content being at most 0.02 mass %.

The invention relates to a method for improving the durability of a lithium-ion power battery, and the lithium-ion power battery. The method comprises the following steps: conducting calcination on needle coke, and then carrying out high-pressure impregnation, graphitization treatment, pulverization for granulation, coating, and halogenation for purification to obtain an anode material capable of effectively improving the durability of the lithium-ion power battery; on the basis of the anode material, further preparing a negative pole piece and the lithium-ion power battery. The method has the advantages that the electrolyte absorptivity and the preserving capability of the anode material are improved, so that the negative pole piece made of the anode material can preserve more electrolyte; when the method is applied to a lithium-ion power battery encapsulated in a vacuum manner with an aluminum-plastic film, the defect that the quantity of preserved electrolyte is too small as the space between an aluminum-plastic film shell body and a battery core is too small can be overcome. Therefore, the aim to improve the durability of the lithium-ion power battery can be achieved.

An air supply and exhaust structure for supplying a reaction air to a fuel cell and exhausting the reaction air passing through the fuel cell includes: an intake duct configured to guide reaction air to the fuel cell; an exhaust duct configured to discharge the reaction air passing through the fuel cell to an outside of the fuel cell; a blower provided in the exhaust duct and configured to suck the reaction air passing through the fuel cell to promote discharge of the reaction air; and an exhaust side shield unit which is disposed inside the exhaust duct and between the fuel cell and the blower and configured to temporarily block the reaction air discharged from the fuel cell and to retain the reaction air in a periphery of the fuel cell so as to introduce the reaction air to the fuel cell.

The application discloses a liquid crystal composition and application thereof in liquid crystal display. The liquid crystal composition comprises compounds shown in formula I, II, III and IV. The liquid crystal composition has excellent performance, wide nematic phase temperature range, proper positive dielectric anisotropy, proper optical anisotropy, high charge retention rate, quick response, low rotary viscosity and wide application prospect and application value in liquid crystal display. By utilizing the liquid crystal composition, high charge retention rate, low power consumption and quick response time can be maintained. The liquid crystal composition is especially suitable for manufacturing active matrix EN-TFT and IPS-TFT displayers with quick response. The expression formula is as shown in the description.

The invention relates to a liquid crystal medium containing a terphenyl compound and application thereof, and discloses a liquid crystal medium and application of the liquid crystal medium in liquid crystal display. The liquid crystal medium has positive dielectric anisotropy, and is characterized by containing one or more compounds represented by a structural formula (I) which is shown in the description. The liquid crystal medium provided by the invention is excellent in performance, has wide nematic phase temperature range, high reflective index anisotropy, extremely high electric charge retention rate and low rotary viscosity, can maintain high electric charge retention rate, low power consumption and the like, and has extremely high response speed. The composition disclosed by the invention has wide application prospect and application value in liquid crystal display, and is particularly suitable for manufacturing quick-response active matrix TN-TFT, IPS-TFT, FFS-TFT displays with great refractive index anisotropy.

The invention provides a valve rod sealing type closed backpressure adjusting type steam security valve which comprises a valve seat, a valve body and a valve cover. An inlet in the lower portion of the valve body is connected with a protected pressure system through a flange, the valve cover is arranged on the upper portion of the valve body, a valve bonnet is arranged above the valve cover, a spring is arranged inside the valve cover, the valve rod and a clamping ring penetrate through a pressing ring, the pressing ring and the clamping ring form a sealing structure, and a lower adjusting ring and an upper adjusting ring are arranged inside the valve body. The valve rod sealing type closed backpressure adjusting type steam security valve has good valve seat sealing performance, motion performance and adjusting performance on the working condition of high temperature and high pressure steam, and does not pollute the external environment. The design of the valve rod sealing type structure, the closed valve body and the closed backpressure adjusting mechanism meets the requirement of minimal overpressure performance parameters, avoids medium leakage, and meets the actual demands of energy conservation, emission reduction and environmental protection.

Various systems and methods are described for controlling an engine in a vehicle, the engine having a cylinder with a bowl. One example method comprises, during regeneration of a particulate filter positioned in an engine exhaust, timing a late post injection of fuel in an exhaust stroke to spray at least some of the injected fuel into the bowl and without hitting cylinder walls.

The invention provides a modified asphalt composition and a preparation method thereof. The modified asphalt composition comprises, by weight, 87.5% to 98.9% of base asphalt, 1% to 10% of a modifier and 0.1% to 2.5% of a gelatinizing agent (a structure improver). The preparation method comprises the following steps: uniformly dispersing the modifier into the base asphalt at a temperature of 150 to 260 DEG C by using equipment like an ordinary agitator, a high speed shearing machine or a colloid mill to prepare the modified asphalt composition; and adding the gelatinizing agent to allow a sol-gel type colloid structure of asphalt to be converted into a gel type colloid structure and to allow a stable colloid structure of asphalt to be formed. According to the invention, the preparation method for the modified asphalt composition is simple; and the prepared modified asphalt composition has a high softening point, high viscosity, a high penetration index, excellent high and low temperature performance, excellent ageing resistance, small temperature sensitivity and the like, can reduce occurrence of damages like tracks and upheaval on a pavement and prolong a maintenance period of the pavement and is applicable to construction of high-grade highways.

The invention discloses a multifunctional crystal growth system of modular design, relates to crystal growth and is characterized in that the system comprises a lifting and pulling mechanism, a growth mechanism, a pulling-down mechanism and a vacuum device. The lifting and pulling mechanism is arranged at the upper end of the growth mechanism, one side of the growth mechanism is communicated with the vacuum device, the bottom end of the growth mechanism is connected with the pulling-down mechanism by a lower water-cooling rod, and in the growth mechanism, crystals are produced in a lifting and pulling method, in a temperature gradient technique (TGT), in a heat exchanging method (HEM), in a molten-salt growth method, in a Kyropoulos method and in a Bridgman method by connecting with the lifting and pulling mechanism and the pulling-down mechanism, and crystals can be produced in a top-seeded temperature gradient technique (TSTGT). The multifunctional crystal growth system of modular design has the beneficial effects of regulating a temperature field by regulating the gradient and obtaining high temperature and temperature distribution required by growth of different crystals conveniently, thus increasing the research, development and production efficiency, improving the crystal sizes and quality and increasing the use ratio of devices.

The invention relates to a salt-resistant and high-temperature-resistant foam discharge agent and a method for preparing the same, and belongs to the technical field of oil and gas field development.The salt-resistant and high-temperature-resistant foam discharge agent comprises, by weight, 0.2-0.5% of anionic-nonionic surfactant composite systems, 0.02-0.08% of microbial fermentation liquor andthe balance water. The microbial fermentation liquor is glycolipid producing biological surfactant or lipopeptide producing biological surfactant microbial strain fermentation liquor. The salt-resistant and high-temperature-resistant foam discharge agent and the method have the advantages that the salt-resistant and high-temperature-resistant foam discharge agent has salt-resistant and high-temperature-resistant foaming, foam stabilizing and liquid carrying ability and is excellent in condensate oil resistance and methanol tolerance, and accordingly the salt-resistant and high-temperature-resistant foam discharge agent and the method are favorable for environmental protection and sustainable development of oil and gas fields.

The invention discloses a positive dielectric liquid crystal composition. The positive dielectric liquid crystal composition comprises a component A which consists of one or more liquid crystal compounds shown in a general formula I, and an additive component D which consists of one or more compounds shown in a general formula S-1, a structural formula S-2, a structural formula S-3 and a general formula S-4. The positive dielectric liquid crystal composition does not change under the conditions of high temperature and ultraviolet radiation, so that the liquid crystal quality is improved; the positive dielectric liquid crystal composition is applicable to an active matrix electric optical element and a liquid crystal display, and can be applied to civil use and practical TFT-LCDs (Thin-Film Transistor Liquid Crystal Displays) under special severe conditions.

The invention relates to a negative dielectric anisotropic liquid crystal composition or rather a negative dielectric anisotropic liquid crystal composition containing one or more dichlorobicyclohexyl compounds and an application thereof. The composition is mainly used for electrooptical adjustment and is especially suitable for FFS (fringe field switching) displays, IPS (in-plane switching) displays and MVA (multi-domain vertical alignment) / PVA (patterned vertical alignment) / PSVA (polymer-stabilized vertical alignment) configuration VA (vertical alignment) type displays. The liquid crystal composition provided by the invention has high optical anisotropy, excellent low-temperature intersolubility and good high temperature and UV (ultraviolet) stability, and is suitable for fast response display devices in various display modes. The defect of relatively low optical anisotropy is overcome, the optical anisotropy of the composition is effectively improved, and the thickness of the liquid crystal layer is reduced, thereby increasing the response speed of the liquid crystal displays. Applied to the liquid crystal display devices, the liquid crystal composition can obviously solve the problem of slow response of the devices and has huge application prospects and market values.

An inflatable packer includes an inflation assembly having an inner expandable bladder, an expandable support position about the bladder, and a reinforced sealing member positioned circumferentially about a portion of the support structure.

The invention relates to a quick-response liquid crystal composition with negative dielectric anisotropy as well as an application thereof. The quick-response liquid crystal composition with negative dielectric anisotropy provided by the invention has great optical anisotropy and excellent low-temperature intersolubility as well as good high-temperature and UV (Ultraviolet) stability and is suitable for quick-response display devices with various display modes. The quick-response liquid crystal composition with negative dielectric anisotropy overcomes the defect of smaller optical anisotropy, the optical anisotropy of the composition is effectively enhanced, and the thickness of the liquid crystal layer is reduced, so that the response speed of the liquid crystal display is accelerated. The quick-response liquid crystal composition with negative dielectric anisotropy applied to the liquid crystal device can remarkably improve the problem that the liquid crystal display is slow in response and has huge application prospect and market value.

A method of processing semiconductor materials and a corresponding semiconductor structure, including providing a virtual substrate of a GaAs epitaxial film on a Si substrate, and epitaxially growing a relaxed graded layer of In.sub.xGa.sub.1-xAs at a temperature ranging upwards from about 600.degree. C. with a subsequent process for planarization of the InGaAs alloy.

The invention discloses a gel polymer lithium ion battery and a preparation method thereof. The preparation method comprises the following steps: step (a), dissolving P (VDF-HFP) powder into an organic solvent to configure a P (VDF-HFP) solution; step (b), adding and dispersing inorganic micropowder into the P (VDF-HFP) solution; step (c), adding a non-solvent containing P (VDF-HFP) into the mixture obtained in the step (b), followed by fully mixing so as to make a diaphragm coating slurry; step (d), uniformly coating a substrate diaphragm with the diaphragm coating slurry, and performing drying so as to obtain a porous composite diaphragm; and step (e), assembling an electrical core with the porous composite diaphragm that is obtained in the step (d), a positive plate and a negative plate, and injecting a liquid electrolyte containing a lithium salt into the assembled electrical core; and then pressurizing, heating and baking the electrical core to obtain a gel polymer lithium ion battery. The gel polymer lithium ion battery provided in the invention has a simple preparation method and the process for making the gel polymer lithium ion battery is easy to control; besides, the battery has good performance.

The curable resin composition of the present invention comprises a polyol component containing tri- or higher functional polycaprolactone polyol; and a polyisocyanate component containing bifunctional or trifunctional alicyclic isocyanate having one or more chemical structures in which an isocyanate group is bonded to a secondary carbon atom.

According to the present invention, a Ni-base superalloy is comprised 2.0 to 6.0 wt. % of cobalt (Co), 8.0 to 12.0 wt. % of chromium (Cr), 5.0 to 9.0 wt. % of tungsten (W), 3.5 to 6.0 wt. % of aluminum (Al), 3.0 wt. % or less of titanium (Ti), 5.0 to 10.0 wt. % of tantalum (Ta), 0.05 to 0.15 wt. % of carbon (C), 0.02 wt. % or less of boron (B), 0.05 wt. % or less of zirconium (Zr), with the remainder being composed of nickel (Ni) and unavoidable impurities.

The invention concretely relates to a pavement self icebreaking anti-slip pavement layer mixed material and a preparation method thereof. Passive deicing measures are mechanical snow removal, salt spreading icebreaking and the like, labor and materials are wasted, and in addition, negative influence can be caused on the environment. The active deicing measures are measures of adding rubber particles into asphalt mixed materials and using the deformation of the rubber particles so that the pavement can generate self stress to crush ice and snow under the external load effect, but the requirement on running vehicles is strict, aggregate under the vehicle running load effect is easy to get loose, and the durability is poor. Rubber particles, polyurethane bonding agents, fiber, hydrophobic materials and dryers are proportionally mixed to be prepared into the pavement self icebreaking anti-slip pavement layer mixed material to be paved on the pavement for inhibiting the pavement accumulated snow and ice. The anti-slip performance of the pavement in winter under the low-temperature snowy condition is improved, the running safety of the running vehicles after the pavement icing is ensured, the pavement is simple, and the durability is high.