Radiation-protective coating of radioelectronic equipment

FIELD: instrument making.

SUBSTANCE: invention relates to instrument making. Radiation-protective coating contains a transition metal of the sixth period of the Periodic system of chemical elements, a post-transition metal of the sixth period of the Periodic system of chemical elements and/or a lanthanoid and an absorbent material containing a chemical element with an atomic number less than the said chemical elements. Radiation-protective coating consists of multiple alternating layers from particles of at least one transition metal of the sixth period of the Periodic system of chemical elements, a post-transition metal of the sixth period of the Periodic system of chemical elements and/or a lanthanide and from the said absorbent material.

EFFECT: invention allows to ensure optimal protection of hardware components from natural ionizing radiations from the space environment.

6 cl, 1 dwg

 



 

Same patents:

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to devices for magnetic resonance. Device contains electric device or component, which includes printed circuit board, and radiofrequency shield, made with possibility of shielding electric device or component, with radiofrequency shield including earth bus of printed circuit board. Device is placed in opening of magnetic-resonance scanner in radiofrequency (B1) field. Earth bus of printed circuit board includes electro-conductive sheet or layer, which has openings, suppressing vibration of earth bus, induced due to changing in time gradient of magnetic field. Magnetic-resonance system contains magnetic-resonance scanner, including basic magnet, winding for creation of magnetic field gradient and one or more radiofrequency coils for production of radiofrequency (B1) field in studied area. Device is placed in opening of magnetic-resonance scanner.

EFFECT: application of invention makes it possible to improve efficiency of MR-compatible electric device work due to reduction of vibration, caused by radiofrequency field.

14 cl, 11 dwg

FIELD: printing industry.

SUBSTANCE: structure of a multi-layer printed circuit board consists of signalling dielectric signal layers comprising topological pattern of printed assembly, alternating with shielding layers made of a grid which is provided with printed conductors tracking the configuration of the topological pattern of the adjacent signal layer. The outer layers are covered with a double layer protective coating consisting of a mixture of ferrite powder with a polymeric binder. The concentration of ferrite powder in the layers of the protective coating is different, at that the layers are applied so that their contact surface, in cross-section in any direction, has a sawtooth configuration.

EFFECT: improvement of quality of protection of printed circuit boards from EMF exposure, providing improved electromagnetic compliance of the printed circuit board with other devices.

1 dwg

Housing wall inlet // 2549886

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to pressure housings and specifically to inlets in said housings. The apparatus includes a base (204) and a wall (203) which defines an internal part and an external part, wherein a sealed inlet has a first portion (202a') of a signal transmission line located outside the housing, a second portion (202b') of a signal transmission line located outside the housing, and a third portion (202c') of a signal transmission line which connects the two other portions (202a', 202b'), wherein the inlet is characterised by that the first portion (202a') is displaced from the wall to provide a first safe distance d, which is the distance between a first portion (202a) of the signal transmission line located on the surface of a second layer and metal parts of the housing.

EFFECT: providing an inlet which minimises the risk of the multipactor effect and enabling the inlet to operate when transmitting high-power signals.

13 cl, 6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: ventilation panel of an electronic device, placed in a housing, consists of a frame and a ventilation plate built into the frame, made of an electroconductive metal or alloy, having a field of ventilation openings, the greatest dimension of each of which provides a given level of shielding the maximum frequency of the electromagnetic radiation of the electronic device, and means of mounting the frame to the housing of the electronic device, which provide electrical contact. The frame of the ventilation panel has at least one recess, the dimensions and shape of which correspond to the dimensions and shape of the ventilation plate, and the depth is greater than 0.5 times the thickness of the ventilation plate; the ventilation plate has a field of openings on its entire area, the maximum dimension of which is selected in the range of 2.0…6.0 mm, and elements for mounting to the frame in the recess, which provide electrical contact. The method of making a ventilation panel includes the following: cutting the ventilation plate from a given type of a perforated sheet of electroconductive material with openings, the greatest dimension of which is in a range which provides a given level of shielding electromagnetic radiation of the electronic device; connecting the plate with the frame using screws or electroconductive adhesive or by welding or soldering.

EFFECT: simple design of the ventilation unit owing to low labour input in making the ventilation panel with high effectiveness of shielding, simple method of making ventilation plates.

16 cl, 14 dwg

FIELD: electricity.

SUBSTANCE: invention is referred to the sphere of protection against electromagnetic interference (EMI) and may be used for protection of computer technology facilities (CTF) of information and communication systems against impact of external and stray electromagnetic radiation (SEMR). A multilayer honeycomb straightener is used with fabrication inhomogenuities made in the form of hollow rectangular prisms with cross-section shaped as staggered regular hexagons and of radar absorbent composite materials.

EFFECT: higher screen factor.

3 dwg

FIELD: electricity.

SUBSTANCE: by the method for manufacturing of a high-power hybrid integral circuit of SHF band individual dielectric layers are made in the preset sequence at a multilayer dielectric substrate with at least one through opening; the preset metallised coating for the circuit is applied to each dielectric layer and screen earthing metallisation is applied to the reverse side of the lower layer at the multilayer dielectric substrate. The preset sequence for the multilayer dielectric substrate is formed by location of separate dielectric layers with simultaneous superimposition of their through openings thus creating at least one through opening in the multilayer dielectric substrate; then sintering and annealing are carried out; the multilayer dielectric substrate is placed and fixed by screen earthing metallization at electricity- and heat-conductive base; an active heat-generating component is placed and fixed in each through opening of the multilayer dielectric substrate ensuring location of their faces in the same plane; electric contact pads of the active heat-generating component are connected to the circuit layout of the metallised coating of the multilayer dielectric substrate.

EFFECT: improving electrical performance due to improvement of heat removal, increase in fabricability with maintenance of available weight and dimensions.

3 cl, 1 dwg, 1 tbl

FIELD: electricity.

SUBSTANCE: device comprises a dielectric case filled with a substance having conductivity and bioactive liquid is used as this substance, at least one polarized photon generator closed by a cover hermetically and installed in the dielectric case filled with bioactive liquid, and at least one tube installed hermetically in at least one opening made in the case cover, at that the tube is made of dielectric having positive value of static electricity surface charge. One end of the tube is submerged to the bioactive liquid while the other end is outputted from the case and closed by a plug of organic material transparent for photons and selected of the group consisting of resins of hardwood and softwood. The bioactive liquid enters into the tube partially.

EFFECT: improved efficiency of neutralisation of electromagnetic background.

13 cl, 3 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to means for protection against electromagnetic fields of electrotechnical and electronic devices and biological objects and can be applied for creation of electromagnetic screens and echo-free chambers. Composite material for protection against electromagnetic radiation consists of polymer base with distributed in it particles of alloy of system Fe-Cu-Nb-Si-B, and is characterised by the fact that it represents multi-layered construction, each layer of which is made of said composition, and content of alloy particles in each layer constitutes 70-90 wt % and is limited by certain range of size of particles from continuous line 1-200 mcm with increase of particle dimensions in each following layer.

EFFECT: increase of working range of material frequencies from 100 MHz to 10 GHz with preservation of low values of reflection coefficient and high values of magnetic permeability.

3 cl, 1 tbl, 2 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: heat-resistant radar-absorbing coating on mineral fibres is obtained by applying an electroconductive carbon layer on mineral fibres with diameter of 4…9 mcm. The carbon coating is obtained from flat carbon particles that are chemically activated in sulphuric acid and nitric acid, said particles having thickness of 4.0…7.0 nm and diameter in the layer plane of 800…3000 nm.

EFFECT: high heat resistance of the coating, wider operating temperature range and wider range of possible applications of the radar-absorbing coating while maintaining efficiency of absorbing electromagnetic radiation.

3 dwg, 7 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a composite film for absorbing electromagnetic waves and an apparatus for making such a film. The composite film has a plastic film and a single- or multilayer metal film which is formed on at least one surface of said plastic film. The metal film has thickness of 0.01-10 mcm, and is coated with a plurality of substantially parallel, periodic, linear scratches made in at least two different directions. Said scratches in each direction differ on width and space in between them.

EFFECT: making a composite film with good absorption capacity for electromagnetic waves at different frequencies and low anisotropy absorption capacity for electromagnetic waves.

10 cl, 36 dwg, 14 ex

FIELD: physics, nuclear.

SUBSTANCE: invention relates to production of radar absorbing materials which reduce the level of secondary radiation, provide electromagnetic compatibility of onboard equipment, correction of directional patterns of onboard antenna systems during prolonged operation and exposure to aggressive media. Radar absorbing material contains dielectric binder - foamed polyurethane and electroconductive filler which absorbs electromagnetic radiation. The material also contains a polyurethane based protective coating. The electroconductive filler which absorbs electromagnetic radiation used is carbon fibre taken in amount of 0.0003-0.005 vol. % or carbonised fibre taken in amount of 0.003-0.05 vol. %.

EFFECT: good radio properties, moisture resistance, resistance to aggressive media, longer use with low density of the material.

FIELD: construction.

SUBSTANCE: construction material on the basis of gypsum is produced by addition of water to composition, in which basic material represents combination of hydraulic gypsum and one type or two or more types of dry-hardening calcium carbonate or calcium hydroxide, or is producd by means of mixing emulsions of synthetic resins with it and inorganic filler with high specific weight so that to execute reaction and setting or drying, at the same time composiiton differs by the fact that it includes 100 weight parts of at least one type or two or more types of main materials, selected from the group including calcium sulfate, calcium carbonate, calcium hydroxide, and also emulsions of organic synthetic resins and 50-3000 weight parts of at least one type or two or more types of inorganic fillers, true specidic weight of which makes 3.5-6.0, selected from the group, including barium chloride, zinc oxide, aluminium oxide, titanium oxide, barium oxide, strontium carbonate, barium carbonate and barium sulfate.

EFFECT: protection against radioactive radiation, small weight, convenience in use, safe for human body.

FIELD: radiation shielding means and their manufacturing processes.

SUBSTANCE: proposed radiation shielding mat has mesh 2 made of copper fibers 3 interwoven with carbon fibers 4 and liquid oak moss solution 5 applied to mentioned mesh 2. Mat creates shielding barrier protecting against terrestrial and electromagnetic radiations and ensures deviation of these radiations.

EFFECT: enhanced reliability of protection against terrestrial and electromagnetic radiations.

10 cl, 1 dwg

FIELD: cloths, compounds, and films affording protection against detrimental impacts presenting safety risk (radiation, chemicals, biological agents, fire, missiles).

SUBSTANCE: proposed radiation shielding compound is produced by mixing material opaque to radioactive radiation, such as barium, bismuth, tungsten, or their compounds with powdered polymer or liquid solution, emulsion, or polymer suspension in solvent or water. Liquefied polymeric film of two extruders is preferably combined so that they are interleaved between two sheets of cloth or any other material such as shielding polymer films or canvas used for chemical or biological protection overalls, bulletproof jackets, or fire-resistant overalls.

EFFECT: enhanced effectiveness and economic efficiency of miscellaneous means for protecting against detrimental impacts.

23 cl, 20 dwg

FIELD: roentgen-ray shielding materials.

SUBSTANCE: proposed X-ray shielding coating has sublayer incorporating cured and plasticized epoxy-containing compound and basic elastic X-ray shielding layer also based on epoxy-containing binder; curing agent from group of cold-curing agents; shielding filler in the form of powdered mixture of rare earth element oxides or mixture of rare earth element oxides with antimony oxide (III), or mixture of rare earth element oxides with tungsten or its compounds, proportion of ingredients being as follows, mass percent: binder, 13.3 - 20.8; shielding filler, 78.6 - 86.3; amine curing agent, o.4 - 0.6. In addition, it has solvent which is essentially mixture of acetic esters, aliphatic and aromatic solvents in the amount of 30 - 40 mass percent per every 100 g of basic X-ray shielding material. Shielding filler content of basic polymerized layer ranges between 78.5 and 88.7 mass percent.

EFFECT: enhanced effectiveness of shielding personnel and patients, improved mechanical and adhesive properties of material.

1 cl, 1 tbl, 4 ex

FIELD: manufacture of roentgen-ray shielding materials.

SUBSTANCE: proposed method includes joining of material layers and curing to produce stack of woven and X-ray shielding material layers by mixing ingredients of cold-hardening X-ray shielding composition. X-ray shielding composition incorporates silicone rubber as binder, shielding filler made of oxide of rare-earth elements mixed up with antimony oxide (III), catalyst, polyamine, and modifying agent, proportion of ingredients per every 100 parts by weight of silicone binder being as follows: epoxy-containing hydrocarbon, 5.0 - 15.0; ortho-phthalate and monatomic alcohols, 0.5 - 3.0; rare-earth element oxides, 160 - 180; antimony oxide (III), 200 - 210; catalyst, 6.0 - 8.0; polyamine, 0.6 - 3.0. Prior to producing stack of fabric layers material is impregnated with organic solution of organometallic compound out of group of organic tin salts. X-ray shielding composition is prepared by sequential mixing up of silicone binder with modifying agent, then catalyst and hardener, followed by their mixing with filler to obtain viscous paste, then catalyst and curing agent (polyamine) which are added to viscous paste just prior to applying the latter to finished woven material. Stack obtained is subjected to compression molding and hardening.

EFFECT: facilitated manufacture.

1 cl, 1 tbl, 1 ex

FIELD: shielding against ionizing rays.

SUBSTANCE: proposed material has sublayer in the form of polybutyl titanate solution or solution of heteroorganic compounds and coating layer of material using silicone polymer as matrix. Coating layer also uses powders of heavy metals, their oxides and carbides as inorganic filler, and cross-linking agent based on mixture of orthosilicic acid ether and products of its hydrolysis. In addition, it has process cross-linking agent in the form of amorphous pyrogenetic silicon dioxide, and curing agent in the form of tin diethyl dicaprylate or catalyst in the form of amino silane solution in orthosilicic acid. Coating layer has following proportion of ingredients, mass percent: silicone polymer, 8.2 - 37.1; heavy-metal powders, their oxides and carbides, 60.7 - 92.0; cross-linking agent, 0.2 - 0.5; process cross-linking agent, 0.2 - 0.5.

EFFECT: enhanced physical, mechanical, and shielding properties of material.

1 cl, 1 dwg, 1 tbl

The invention relates to the protection from radiation, and more specifically to a material for protection against radiation, which is intended for use in medicine, at work, at home, as well as to ensure electromagnetic compatibility of radio equipment and devices

The invention relates to the nuclear industry, in particular for the manufacture of radiation-protective containers KT intended for storage and transport of radioactive sources

FIELD: shielding against ionizing rays.

SUBSTANCE: proposed material has sublayer in the form of polybutyl titanate solution or solution of heteroorganic compounds and coating layer of material using silicone polymer as matrix. Coating layer also uses powders of heavy metals, their oxides and carbides as inorganic filler, and cross-linking agent based on mixture of orthosilicic acid ether and products of its hydrolysis. In addition, it has process cross-linking agent in the form of amorphous pyrogenetic silicon dioxide, and curing agent in the form of tin diethyl dicaprylate or catalyst in the form of amino silane solution in orthosilicic acid. Coating layer has following proportion of ingredients, mass percent: silicone polymer, 8.2 - 37.1; heavy-metal powders, their oxides and carbides, 60.7 - 92.0; cross-linking agent, 0.2 - 0.5; process cross-linking agent, 0.2 - 0.5.

EFFECT: enhanced physical, mechanical, and shielding properties of material.

1 cl, 1 dwg, 1 tbl

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