34results about How to "Meet the requirements of high temperature use" patented technology

The invention provides a solar spectrum selective absorbing coating and a preparation method thereof, wherein the preparation method comprises the following steps of: (1): selecting copper or stainless steel as substrate material; (2): selecting high-temperature oxidation resisting TiAlN as a diffusion impervious layer, using pure metal Cu or Al as a high infrared reflective layer, wherein an absorbing layer consists of two conductive particle-ceramic (AlN) composite layers with different volume percentages of metal nitride conductive particle (TiAlN), using AlN as an antireflection layer, and using SiO2 as a protective layer; (3): controlling components and contents of different film materials by controlling the gas flow and the sputtering power and the like; (4): before placing the substrate material into a vacuum chamber, carrying ultrasound treatment on the substrate material for 10-30 min, drying, after placing the substrate material into the vacuum chamber, roasting for 10-30 min at 100-120 DEG C, before sputtering, bombarding the surface by argon ions; and (5): obtaining a coating with a multi-layer structure, which has high absorption rate Alpha (0.95 +/- 0.02) in the solar spectral region (0.3-2.5 micrometers), and which has quite low emissivity Epsilon (0.04 +/- 0.01) in an infrared region (2.5-50 micrometers).

An adhesive poly-olefin resin composite consists of grafted polypropylene 0.1-40 wt% ( MFR 1-40 wt%), polypropylene 20-48 wt% ( MFR 0.3-40 wt%), linear low-density polythene 20-40 wt% ( MFR 0.8-10 wt%), high-density polypropylene 10-30 wt% ( MFR 2-5 wt%), multi-polymer of ethylene and octane 1-20 wt% in proportion of 1:1 ( MFR 0.5-30 wt%) and polystyrene 1-10 wt%. Grafted polypropylene is unsaturated carboxylic acid, anhydride or carboxylic ester as the first grafting monomer, styrene is the second grafting monomer, the grafting rate of unsaturated carboxylic acid, anhydride or carboxylic ester of polypropylene is 1-10 wt%. It has excellent binding performance with steel, iron and aluminum, peeling strength is >=80 N/10 mm, and softening point is >=120 degree(GB 1613-90). It can be used for chemical container and pipeline.

The invention relates to a proton exchange membrane and preparation method thereof, and the proton exchange membrane is a Poly-p-phenylene ben-zobisthiazole and polyphosphoric acid blend membrane (PBO/PPA), and the method for preparing the Poly-p-phenylene ben-zobisthiazole and polyphosphoric acid blend membrane (PBO/PPA) as a proton exchange membrane comprises: (1) polymerizing and obtaining a PBO/PPA slurry; (2) preparing the PBO/PPA slurry into a PBO/PPA proton exchange membrane; (3) controlling the thickness of the membrane by controlling the concentration of the polymer solution and the compacting temperature and pressure; (4) carrying out a proton conductivity test directly after the membrane is taken out and the membrane is used as a proton exchange membrane is assembled in the H2/O2 fuel monocell for investigating power generation performance. The invention selects an appropriate film forming technology according to the characteristic of the PBO rigid molecular chain, and has the advantages of simple preparation technology and easy control, and the obtained proton exchange membrane has a higher proton conductivity under high temperature with excellent power generation property.

The invention discloses a method for preparing a double-layer wave-permeable heat proofing and insulating composite structural part. The structural part comprises an inner heat insulation material and an outer heat-proof +material. The method includes steps of preparation of the outer heat-proof material, preparation of silicon oxide hollow microspheres, preparation of chopped fiber reinforced silicon oxide hollow microsphere slurry, casting of the chopped fiber reinforced silicon oxide hollow microsphere slurry and thermal treatment of a structural part blank material. Quartz fiber reinforced quartz composite ceramic serves as the outer heat-proof material, chopped fiber reinforced silicon oxide hollow microsphere ceramic serves as the inner heat insulation material, compact combination of the inner and outer materials is realized by means of slurry casting and high-temperature sintering moulding, and integration of advantageous performances of high temperature resistance, heat proofing, heat insulation, wave permeability and the like is realized.

The invention relates to a low-temperature preparation method of a ceramic coating absorbing waves in the frequency band of 8-18 GHz. Firstly, the surface of a substrate material is uniformly brushed with slurry containing a wave absorbing agent by adopting a brushing method, and a wave-transmitting layer is prepared on the surface of the wave absorbing agent through a chemical vapor deposition technology after standing and drying in the shade. The wave absorbing coating and the substrate material are well bonded, and the wave absorbing performance of the material can be remarkably improved. The method has very strong designability, for example, a coating structure and components can be optimized by adjusting the type of wave absorbing agents, the type of wave-transmitting layers, deposition time and other parameters, and accordingly the substrate material can obtain good wave absorbing performance.

The invention relates to the technical field of light-thermal conversion, in particular to a tower-type heat collector light-thermal conversion coating and a preparation method thereof. The invention provides the tower-type heat collector light-thermal conversion coating, which is arranged on a metal matrix, and comprises a transition layer, a high-infrared reflecting layer, and absorbing layer and an emission reducing layer sequentially arranged from inside to outside. The transition layer comprises a metal layer, a compound gradient layer and a compound layer sequentially arranged from inside to outside. The structure is simple, the process is simple and convenient, and the manufacturing cost is low. According to the tower-type heat collector light-thermal conversion coating provided by the invention, the transition layer is coated by adopting a gradual three-layer transition way from the metal layer to the metal compound layer, so that the binding force of the coating and the metal matrix is improved, the service life is long, and the tower-type heat collector light-thermal conversion coating can be applied in high temperature and bad atmospheric environment; and meanwhile, the light-thermal conversion coating provided by the invention has higher absorption rate within a solar spectrum range, has lower emissivity within an infrared region, has the characteristics of high temperature resistance and oxidation resistance, and meets the requirement on solar energy high temperature utilization.

The invention relates to the technical field of lubricating grease, and particularly discloses lubricating grease as well as a preparation method and application thereof. The lubricating grease provided by the invention takes melamine cyanurate as an anti-wear agent, takes a mixture of octyl/butyl diphenylamine and a phenol antioxidant as an antioxidant, and further comprises a composite lithium-calcium thickening agent; wherein the mass ratio of the composite lithium-calcium thickening agent to the anti-wear agent to the antioxidant is 1: (0.1-0.3): (0.2-0.5). The lubricating grease disclosedby the invention is good in oxidation resistance, good in wear resistance, good in anti-shearing performance, good in anti-corrosion protection effect, suitable for friction pair working conditions of large vibration, high temperature and high-frequency sliding, and particularly suitable for lubricating an electric hammer air cylinder.

The invention discloses a high-strength heat-resistant magnesium alloy and belongs to the technical field of magnesium alloy materials. The high-strength heat-resistant magnesium alloy comprises the following components in percentage by mass: 5.5-6.2% of Y, 0.5-0.7% of Ce, 0.4-0.6% of Zr, 0.2-0.5% of Sb and the balance of Mg and inevitable impurities. The magnesium alloy is prepared by taking pure Mg and Sb as well as intermediate alloys of Mg-25%Y, Mg-25%Ce and Mg-25%Zr as raw materials, smelting and casting to obtain magnesium alloy ingots at first, then performing solid-solution treatment on the magnesium alloy ingots sequentially for 8 hours at 525 DEG C, and performing aging treatment for 16 hours at 225 DEG C. The magnesium alloy disclosed by the invention has relatively high room-temperature and high-temperature strength, and has relatively good strength stability at 200-300 DEG C.

The invention provides a steel wire rope lubricating grease composition which comprises the following components, by weight: 54-65 parts of base oil, 15-25 parts of a thickening agent, 15-35 parts of a tackifier, and 1-10 parts of an additive. The steel wire rope lubricating grease with a high dropping point is obtained by optimally proportioning the types and dosages of the base oil, the thickening agent, the tackifier and the additive, and the problem that the lubricating grease drips at a high temperature is solved. The dropping point of the steel wire rope lubricating grease can reach over 95 DEG C, so that the high-temperature use requirement is met. The invention also provides a preparation method of the steel wire rope lubricating grease composition.

The invention relates to a suspended labyrinth sleeve structure, and belongs to the technical field of fluid control valves. The suspended labyrinth sleeve structure comprises a valve body, an upper cover, a sleeve assembly and a valve core assembly; an inlet flow passage and an outlet flow passage are distributed on the valve body and are correspondingly arranged at the two ends of the valve body; the sleeve assembly is mounted on an upper cavity convex table of the valve body; the valve core assembly is arranged in the sleeve assembly; the valve core assembly adopts a pilot valve core structure, and can linearly move along the inner wall of the sleeve; an upper cover is arranged in the axial direction of the outlet flow passage of the valve body; a gasket is arranged between the valve body and the upper cover; and the valve body and the upper cover are connected into a whole through studs and nuts. The suspended labyrinth sleeve structure can effectively achieve the effect of pressure drop, the service life of the whole sleeve assembly is prolonged, a high temperature and high pressure can be borne, and the working conditions of a high pressure difference and a high sealing gradecan be adjusted. The suspended labyrinth sleeve structure is relatively low in machining precision requirement, the thrust of a required actuator is small and the sealing effect is reliable.

The invention belongs to the technical field of casting, and mainly relates to a component design of a novel 9Cr-3W-3Co martensite heat-resistant steel material. Ni element is added in a component design process, and on the premise that the plasticity of the material is not reduced, the strength of the material is increased, and the room-temperature mechanical property of the material is improved; more trace elements such as B and N are added, so that the B element is greatly distributed on the M23C6 carbide after heat treatment, and the high-temperature endurance strength of the material is improved; a trace amount of Mo element is added, so that the effects of solid solution strengthening and precipitation strengthening are achieved; and the content requirement of Cu element is lowered, and the brittleness tendency of the Cu element is reduced.

The invention provides a urea-based lubricating grease composition for an electric hammer cylinder. The urea-based lubricating grease composition comprises the following components by mass: 6.5%-11.2%of a thickening agent, 2.0%-3.0% of an antioxidant, 0.05% of an antirust agent, and 2.0%-6.0% of an extreme-pressure anti-wear agent, with the balance being base oil, wherein the thickening agent isprepared by subjecting raw materials consisting of octylamine, aniline and diphenylmethane diisocyanate to an addition reaction, and the viscosity range of the base oil at 40 DEG C is 168-180 mm<2>/s.According to the urea-based lubricating grease composition for the electric hammer cylinder, the shear stability of lubricating grease is improved, the lubricating grease has the characteristics of good oxidation resistance, good wear resistance, good corrosion resistance, good protection effect and the like, the lubricating working condition of the electric hammer cylinder can be better met, theuse temperature range of the lubricating grease is 20-180 DEG C, and the lubricating grease has wide popularization value.

The invention relates to high-temperature plateau mountain vehicle hub bearing lubricating grease and a preparation method thereof. The high-temperature plateau mountain vehicle hub bearing lubricating grease comprises the following components in percentage by weight: 70-90% of base oil, 5-20% of a thickening agent, and 1.5-12.5% of an additive, wherein the base oil is mineral oil with the viscosity of 180-220 mm<2>/s at 40 DEG C, and the thickening agent is a composite lithium-based thickening agent. According to the full mineral oil type high-temperature plateau mountain vehicle hub bearinglubricating grease provided by the invention, on the premise of excellent high-temperature performance, extreme-pressure anti-wear performance and water resistance, the production cost is controlled,the problem of fat loss of existing hub bearing lubricating grease is solved, and the hub bearing lubricating grease can be used within the temperature range of -30 DEG C to 180 DEG C for a long timeand can meet the use requirements of various vehicle hub bearings in areas (including plateau mountainous regions) at -30 DEG C or above.