31results about How to "Improve microwave permeability" patented technology

Disclosed is high elasticity wave-absorbing anticorrosion nanometer coating with the weight ratio composition of 1-5% nanometer titanium alloy, 1-10% carbon fiber, 1-10% copper powder, 13-25% T-ZnO, 15-30% magneto plumbite type ferrite and 25-68% epoxy modified acrylic acid elastic resin; the radius of nanometer titanium alloy is 20- 50nm; the radius of carbon fiber is 20-30nm and the length of carbon fiber is 100-500nm; the radius of the particle of copper powder is 20-30nm; the radius of the particle of T-ZnO is 40-70nm; the radius of magneto plumbite type ferrite is 20-100nm and the lengthis 100-300nm; the Rho of epoxy modified acrylic acid elastic resin is equal to 1.1-1.2. The high elasticity wave-absorbing anticorrosion nanometer coating has super strong anticorrosion property and avoids the device from corrosion when the device operates under badly corrosive environment for long time; the anticorrosion nanometer coating is bonded firmly with the substrate and has the advantages of high elasticity and good wave-absorbing performance.

The invention relates to an energy-saving door window frame or door window sash or door panel section or door panel or window frame, a window sash and a door window reinforcing rib made of a polyurethane composite material consisting of polyurethane resin and glass fibers and a forming method. The polyurethane composite material comprises the glass fibers, multiple bundles of glass fiber densely distributed layers form a door window frame or door window sash frame or door panel section forming framework or door panel forming framework, or the multiple bundles of glass fiber densely distributed layers and a glass fiber mat form a door window frame or door window sash frame or door panel section forming framework or door panel forming framework, the polyurethane resin is compounded with the inner surface and the outer surface of the door window frame or door window sash frame or door panel section forming framework or door panel forming framework, and accordingly a polyurethane door window frame or door window sash frame or door panel section or door panel is formed. The energy-saving door window frame or door window sash or door panel section or door panel or window frame, the window sash and the door window reinforcing rib have the advantages that firstly, weight is light, and strength is high; secondly, energy conservation and heat insulation are realized; thirdly, environmental protection and energy conservation effects are remarkable; fourthly, corrosion resistance and aging resistance are realized; fifthly, dimension stability is fine; sixthly, weather resistance is fine; and seventhly, insulation property is fine.

The invention relates to a polyurethane composite material special-shaped section for a glass curtain wall and a forming method, wherein the polyurethane composite material special-shaped section is made of polyurethane resin and glass fibers. The polyurethane composite material special-shaped section comprises the glass fibers, multiple beams of glass fibers are densely distributed to form a special-shaped section framework, and the polyurethane resin is compounded with the inner surface and the outer surface of the special-shaped section framework to form the polyurethane special-shaped section. The polyurethane composite material special-shaped section has the advantages that firstly, weight is light and strength is high; secondly, energy conservation and heat insulation are realized; thirdly, healthful, environment-friendly and energy-saving effects are remarkable; fourthly, corrosion resistance and ageing resistance are high and the service life is long; fifthly, dimension stability is good; sixthly, weather resistance is good and high temperature resistance and low temperature resistance are better; seventhly, insulation property is good; eighthly, shock absorption property is fine; ninthly, polyurethane composite material special-shaped section is colorful, a polyurethane composite material is high in hardness, and various coatings can be coated on the polyurethane composite material, so that sections in various colors are manufactured to meet requirements of application in different styles and grades; and tenthly, fatigue resistance of the polyurethane composite material is quite high, so that service safety and reliability of the material are guaranteed.

The invention relates to the technical field of wave-absorbing materials, in particular to a magnetic wave-absorbing agent and a preparation method thereof. The preparation method is to use the vacuum coating method to alternately deposit a certain thickness of magnetic material and dielectric material on a substrate uniformly coated with a sacrificial layer to obtain a multilayer film, then remove the sacrificial layer to obtain a multilayer magnetic film, and then crush the multilayer magnetic film to obtain a magnetic film. Nanosheet-like absorbent. The preparation process is simple and easy to adjust, and the prepared magnetic nanochip absorbent has smooth surface, few internal defects, small stress, controllable magnetic composition, multilayer structure, large aspect ratio and good surface insulation. It can break through the magnetic permeability bottleneck of the magnetic nanocrystalline absorbent prepared by the existing ball milling method due to rough surface, large internal defects and stress, poor microstructure control ability, and limited width-to-thickness ratio. The microwave permeability of magnetic absorbers and suppresses their permittivity.

The invention discloses an electronic paramagnetic imager. The electronic paramagnetic imager comprises a sample container, a quick-scanning resonator, a pair of quick-scanning coils, a pair of main magnets, a pair of gradient magnets, a main magnet driver, a gradient magnet driver, a quick-scanning coil driver, a microwave source, a power amplifier, a signal amplifier, a quick digitalizerand a computer. A signal is directly recorded by the quick digitalizer, and the electronic paramagnetic imager has the advantages that the ratio of signal to noise is extremely high, the data collecting timeis short, and big-power input is achieved, and the frequency can be adjusted. Theelectronic paramagnetic imager reconstructs a two-dimensional image of a tumor according to space distribution of a sample signal. The work frequency of the imager is low frequency about 250 MHz, the electronic paramagnetic imager can measure a tumor model of a mouse and the human body, the microwave permeability is better, the measuring range is larger relatively, and an operation does not need to be performed.

The invention relates to a composite energy-saving door window frame or door window sash frame with high strength, low proportion, insulation property, microwave transmission, corrosion resistance, fine heat insulation effect and high decoration and a forming method. The composite energy-saving door window frame or door window sash frame comprises a door window frame or door window sash frame made of double-component materials, one surface of the door window frame or door window sash frame is made of glass fiber reinforced plastic sections while the other surface of the door window frame or door window sash frame is made of wood sections, and the surface made of the glass fiber reinforced plastic sections matches with the surface made of the wood sections to form the composite energy-saving door window frame or door window sash frame. The composite energy-saving door window frame or door window sash frame has the advantages that firstly, weight is light, and strength is high; secondly, energy conservation and heat insulation are realized; thirdly, healthfulness, environmental protection and energy conservation effects are remarkable; fourthly, corrosion resistance and ageing resistance are realized, and the service life is long; fifthly, dimension stability is good; sixthly, weather resistance is fine, and high temperature resistance and low temperature resistance are better; seventhly, insulation property is good; eighthly, shock absorption is fine; and ninthly, composite energy-saving door window frame or door window sash frame is colorful, the hardness of a polyurethane composite material is high, various coatings can be coated on the polyurethane composite material, and accordingly sections in various colors can be manufactured.

The invention belongs to the technical field of electronic materials, and particularly relates to a microwave frequency band (0.5GHz-18GHz) electromagnetic wave absorbent and a preparing method thereof. The absorbent is made of pure ferrum, pure aluminum, pure chromium and polycrystalline silicon. By mass, larger than or equal to 65% but smaller than or equal to 78% of pure Fe, larger than or equal to 5% but smaller than or equal to 12% of pure aluminum, larger than or equal to 2% but smaller than or equal to 12% of pure chromium and larger than or equal to 8% but smaller than or equal to 16% of polycrystalline silicon are molten, and nanocrystalline / amorphous biphase particles with the grain size of 10-50 nm are formed. According to the prepared absorbent, when an electromagnetic absorption material is prepared with the 30-40% of absorbent and paraffin as an auxiliary material, on the frequency band of 0.5 GHz-18 GHz, magnetic conductivity [mu]'max is larger than or equal to 7 but smaller than or equal to 8, and [mu]''max is larger than or equal to 4 but smaller than or equal to 5. The technology is simple, operability is high, and cost is low. The absorbent is suitable for batched production.