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

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 discloses a high-temperature FeNiCo magnetostrictive alloy and a preparation method thereof. The weight percent of the chemical composition of the alloy is: Ni: 30.0-55.0%, Co: 1.0-22.0%, Cr: 1.0-3.5%, Mo: 1.0- 3.5%, Ti: 1.0-3.0%, Al: 0-2.0%, B: 0-0.006%, and the balance is Fe. The high-temperature magnetostrictive alloy of the invention has a high Curie temperature, good magnetic properties and a large saturation magnetostriction coefficient in a wide temperature range, and can meet the high-temperature use requirements of high-precision instruments and meters.

The invention provides a detachable lightweight high-temperature electrical connector comprising a base assembly, a screw sleeve assembly and a housing assembly. The base assembly, the screw sleeve assembly and the outer shell assembly are arranged from the inside to the outside in sequence; The base assembly comprises a lower base and an upper base, wherein a contact part and a stay spring ring are arranged in the upper base, one end of the upper base is buckled with the lower base, and the other end of the lower base is provided with a nut; The support spring coil is arranged at both ends ofthe contact piece; The peripheral ring of the support spring coil is a support barb structure, and the contact piece is fixed by the support barb; The screw sleeve assembly is installed from the tailend of the shell part and fixed by a retaining ring; The nut presses the base assembly into the housing joint. The invention can meet the requirements of high-temperature use, and the shell materialdensity is small, and the weight reduction purpose can be achieved, and the weight loss is about 30% compared with the existing high-temperature products with the same specification; The contact piececan realize the disassembly function and satisfy the reliability of the assembly between the parts.

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 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).

The invention relates to a non-vacuum solar spectrum selective absorption coating and a preparation method thereof. The preparation method comprises the following steps: (1) selecting copper or stainless steel with low infrared emissivity as a base material; (2) selecting oxide resistant to high-temperature oxidation, nitride and complex or doped oxide as a film material, wherein a metal or an alloy serves as a bonding force increased layer, metal nitride or pure metal serves as a high infrared reflecting layer, an absorption layer is composed of two conducting particle ceramic layers with different metal nitride conducting particle volume fractions, and aluminium nitride and aluminium oxide serve as an antireflection layer; (3) controlling the components and contents of different film materials by controlling gas flow and sputtering power; (4) cleaning the base material before the base material is placed into a vacuum chamber, and carrying out argon ion bombarding on the surface of the base material before sputtering is carried out; and (5) obtaining a multilayer coating, wherein the thickness of the coating is less than 500nm, and the coating has high absorption rate alpha (0.9-0.97) in the solar spectrum range (0.3-2.5microns) and has extremely low emissivity epsilon (0.02-0.18) in the infrared region (2.5-50microns).

The invention relates to a preparation method of polyimide paper. The method includes the steps: (1) performing surface treatment for polyimide chopped fibers and polyimide fiber pulp; (2) dispersing products obtained in the step (1) in water solution with dispersing agents; (3) sequentially performing papermaking, rolling and drying products obtained in the step (2); (4) dipping or coating the surfaces of the products obtained in the step (3) with solution or dispersing liquid of resin binders. The invention further relates to polyimide paper prepared by the method. According to the method, the polyimide fibers and the polyimide fiber pulp directly serve as raw materials, and the method can solve the problems that the polyimide fibers need to be used instantly after preparation as the polyimide fibers are degraded when being stored for a long time, and inner stress of paper surfaces is generated as shrinkage ratio is excessive when the polyimide fibers are imidized and formed. The polyimide paper prepared by the method sufficiently keeps good high-temperature resistance and insulation performance of polyimide materials and has good mechanical strength.

The invention discloses an ultra-low thermal shrinkage polyurethane microfiber base cloth and a preparation method thereof. The preparation method of the ultra-low thermal shrinkage polyurethane ultrafine fiber base cloth comprises the following steps: making nylon 6 or polyester, polyethylene or styrene into The non-woven fabric formed by sea-island short fiber is impregnated in wet slurry, then coagulated and washed with water, and then the polyethylene or styrene is decremented in hot toluene to obtain a wet cloth, and then the wet cloth is impregnated Continuous kneading and drying in the oiling solution can obtain the ultra-low heat shrinkage polyurethane microfiber base cloth; the oiling solution contains amino silicone oil, isomerized decanol polyoxyethylene ether, isomerized decanol polyoxyethylene ether, isomerized decanol Triol ethoxylates, diethylene glycol monobutyl ether and water. The invention has an ultra-low thermal shrinkage rate, the thermal shrinkage value of the finished base fabric is 0.1-1.5%, and the features of fine creases can meet the requirements of high-temperature use and high-temperature dry veneering.