Material for protection from exposure to radiation

 

(57) Abstract:

Use: for protection from exposure to radiation. The essence of the invention: material contains non-metallic base coated with an electrically conductive coating. The coating consists of layers, and the first from the base layer is made in the form of a composition consisting of a non-metallic electrically conductive compounds and metals, and the remaining layers are made of electrically conductive non-metallic compounds and/or metals. Composite layer contains sulfides of metals and/or metal oxides, and/or graphite particles and metals. 1 C.p. f-crystals, 1 table.

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.

Known material for protection against radiation (US, N 2996710), for example, electromagnetic nature, containing dielectric base, for example of neoprene, which is applied to the metal layer, in which Nickel is used.

A known material may be used at small thicknesses for reliable eeoyt coverage.

Known material for protection from the radiation of electromagnetic nature (US, N 4439768) containing dielectric base in the form of a fabric coated with a metallic conductive coating, such as Nickel.

Known material at small thicknesses provides little attenuation of electromagnetic fields in the frequency range from 0.1 to 5 MHz due to the weak magnetic properties of the coating.

Known material for protection from the radiation of electromagnetic nature (EN, N 2000680) containing non-metallic basis with a deposited conductive coating.

The known material is not sufficiently high adhesion of the coating to the substrate and protective properties against electromagnetic radiation at frequencies up to 100 kHz due to non-continuous coatings embossed areas of the framework due to the lack of electrical conductivity from the first foundations of the non-metallic layer.

The present invention is the task of creating material for protection from exposure to radiation from such a coating composition, which would provide a combination of high strength coating to the base and higher performance protection from electromagnetic radiation with minimum weight cover which is the fact that what material for protection from exposure to radiation, containing a non-metallic base coated with an electrically conductive coating comprising a non-metallic layers with low electrical conductivity and metal layers with high electrical conductivity, according to the invention, further comprises a first from the base layer with an average electrical conductivity, which is a composition consisting of non-metallic compounds and metals.

The use of first floor from the base conductive layer with an average conductivity can improve the adhesive strength of the coating to the substrate, due to the larger area of the clutch due to deeper penetration into the material and protective properties against electromagnetic radiation at frequencies up to 100 kHz.

The receiving layer with an average electrical conductivity is achieved by creating a composition consisting of a non-metallic electrically conductive compounds, sulfides, metal oxides, colloidal particles of graphite and metals.

Preferably, the layer with an average conductivity contained compounds sulfides of metals selected from I, II, III, IV, V, VI, VII, VIII groups of the periodic system of elements, oxides of metals selected from I, II, III, IV, V, VI, VII, VIII groups of the periodic system of elements, and the ratio between the non-metal component and the metal composition was chosen in the range from 99:1 to 1:99.

In the famous invention of the non-metallic layer consisting of sulfides of metals is mainly a surface electric resistance of from 100 to 50,000 Ohms/cm2that may coating. The surface resistance of very thin films of metals, such as silver or palladium obtained by a chemical method for the subsequent deposition of other layers of the coating metal is less than 1 Ohm/cm2.

When added to a composition of the first layer to the sulfides of the metals vysokoporodnyh oxides such as tin dioxide, or graphite, or metal, such as silver, palladium, bismuth, and others, you can increase the conductivity of the coating, and when the introduction in about 1% of the silver coating significantly increases the electrical conductivity. At the same time, the first from the base layer almost the whole may consist of metal, for example, when the recovery of metallic Nickel on a non-metallic basis of solutions of salts of Nickel dithionite sodium, in addition to the Nickel coating pinolene metallic palladium or a silver compound of divalent tin, which, after oxidation to tetravalent can be fully or partially translated into carbon dioxide tin.

Possible deposition of a metal component of the composition layer of almost any metal by a vapor-phase decomposition of compounds or vacuum metallization of molten metal with an additional transfer of metals into oxides or sulfides, or by adding colloidal schedule to achieve the specified parameters.

Thus, almost all the metals I, II, III, IV, V, VI, VII, VIII groups of the periodic system can be represented in the composition of their sulfide or oxide forms and inclusions of graphite depending on the cover material, assignments, and quality requirements.

Coating a first layer of such a composite material can be presented independently without subsequent layers and have a broad purpose in the technique, for example, be used as a radar absorbing material.

The proposed material for protection from exposure to radiation and contains a non-metallic base and a deposited conductive coating consisting, for example, of the first layer with an average conductivity is represented as a composition of a connection is to bismuth is about 70:30, the second layer with a high electrical conductivity, consisting of an alloy of Nickel with cobalt, iron and samarium, and a third layer with a high electrical conductivity, for example copper, silver or gold.

The first layer is applied, sequentially processing non-metallic basis of first in ammoniacal solution of salts of these metals to full wet, then in water, in a solution of sodium sulfide in water, in tartrato the bismuth salt solution and again water. The number of metallic bismuth is regulated by the quantity of salt in the solution and the time of processing.

The second metal layer is applied by electroplating from an electrolyte containing Nickel sulfate 200 g/l, cobalt chloride 40 g/l boric acid 30 g/l saccharin 0.5 g/l, at a temperature of 40oC and a current density of 1 A/DM2.

The third layer may also be deposited by electroplating from known solutions, copper plating, silver plating or gold plating. It can also be precipitated by other methods, such as chemical precipitation from solution, by metallization under vacuum, and so forth.

The outer layer of metal suitable depending on the operating conditions and the material to perform Elenovo, rubber, oxide, sulfide, chromate, aluminum, and others;

to improve conductivity and heat-reflecting properties of the coated copper, silver, gold, aluminium;

to improve paemst put a layer of an alloy of tin and lead or bismuth;

to create svetopolskaya properties of the applied coating: oxide, black chromium, sulfide, and others;

As the substrate material can be used for fabric, paper, film, sponge and non-woven synthetic and grafirovanija materials.

The table below shows examples of different combinations in the form of conductive layer coating on a fabric basis and their protective characteristics. Increasing the strength of the coating to the substrate is observed almost everywhere in 2 and more times that associated with a more hollow cover the basics of the material.

In all the examples, the weakening of the electric field is achieved over 90 dB, the attenuation of the microwave oven to 80 dB.

The application of metallic coatings on non-metallic basis can significantly change the coefficient of thermal shielding: changes 50oC from 0.5 to 0.75.

In almost all cases, the coating can further Kraslice embodiments of the first layer of conductive coatings with an average conductivity, and the further metallic layer with low electrical conductivity and a metal with high electrical conductivity.

The coating thickness may vary in a wide range from 0.5 to 100 microns and more, however, the most used material with a coating thickness of from 2 to 15 μm, due to its sufficient shielding efficiency combined with flexibility, permeability, transparency, low consumption and adaptability.

In examples 1 to 8 in the composition of the first layer as the non-metallic component includes sulfides of metals I, II, III, IV, V, VI, VII, VIII groups of the periodic system of elements.

In examples 1, 4, 12 in the first layer as the non-metallic component is graphite.

In examples 6, 7, 8, 10, 11 in the composition of the first layer as the non-metallic component comprises oxides of metals I, II, III, IV, V, VI, VII, VIII group of the periodic system of elements.

In examples 1 to 12 in the first layer as a metal component includes metals I, II, III, IV, V, VI, VII, VIII groups of the periodic system of elements.

In all variants of the examples that followed the first layer of conductive metal layers with Vysocany layer is non-metallic with a low electrical conductivity in the form of sulfides and oxides of metals.

In the examples, the conductivity of the first layer ranges from 1.0 Ohm/cm2(example 10) to 3 Ohms/cm2(example 8).

The proposed material is characterized as follows:

high protective characteristics from the conductive fields in a wide range of frequencies from 50 Hz to 30 GHz, and especially different protective characteristics in the frequency range up to 100 kHz;

high reflectivity of a wide range of radio frequencies at the level of 99%

high conductivity, allowing the use of the material in designs and products related to solving problems with static electricity;

high thermal protection from infrared radiation;

high technology and low consumption of materials and constructive, thanks to its inherent flexibility, lightness, breathability, mechanical strength, adhesion to various non-metallic bases (rubber, polymeric materials, etc.);

the possibility of its application in hard structures;

the possibility of use in medicine, thanks to the reflection of heat radiation of the body of man or animals (soft warm bodies), as well as protection against electromagnetic radiated Trach, the screens of the terminals, while protecting from heat and electromagnetic radiation. The stream of electromagnetic radiation from the screens of the terminals at a frequency of 60 Hz is attenuated more than 20 times when transparency 42-43%

the possibility of shielding geopathic zones;

the possibility of fusion, soldering, gluing.

1. Material for protection from exposure to radiation, containing a non-metallic base coated with an electrically conductive coating, wherein the conductive coating consists of layers, and the first from the base layer is made in the form of a composition consisting of a non-metallic electrically conductive compounds and metals, and the remaining layers are made of electrically conductive non-metallic compounds and/or metals.

2. The material on p. 1, wherein the composite layer contains sulfides and/or oxides of metals and/or graphite particles and metals.

 

Same patents:

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

The invention relates to the electronics industry and is designed to protect electrical circuits and elements, they are included in the composition of different products from the effects of external electromagnetic fields (EMF) generated powerful radiating equipment

The invention relates to means of protection from electromagnetic radiation in a broad range of frequencies and intensities of electromagnetic radiation and can be used in various fields of national economy, such as protection and shielding devices and other equipment from electromagnetic fields and radiation, protection from harmful fields of microwave radiation, electric or magnetic fields greater and lesser intensity, as well as static electricity

The invention relates to means for vehicles and can be used to protect motor vehicle

The invention relates to electrical engineering and can be used to eliminate the effect of magnetic fields (interference) on the quality of the image on the screen of the cathode-ray tube of a color image is used, in particular, in marine monitors

The instrument hood // 2031454
The invention relates to instrument making, radio measurements using devices with cathode-ray tube, to the field of nondestructive testing and can be used in particular for ultrasonic testing of welded joints and other metal products mechanical engineering, shipbuilding, transport

Magnetic screen // 2030139

FIELD: composite materials.

SUBSTANCE: invention discloses a method for manufacturing composite material for shielding-mediated protection against electromagnetic emission and can be used in electronics, in radio engineering, and also in a series of special-destination articles. In addition, material may be used for anechoic boxes and in various assemblies of technical devices and radio apparatuses. Method comprises mixing modified graphite-containing conducting filler and polymeric binder at weight ratio (50-80):(20-50). Once ingredients combined, mixture is additionally subjected to thermal expansion in thermal shock mode at 250-310оС and then molded. Polymeric binder is selected from polyolefins, polystyrene, fluoroplastic, polyvinylchloride paste and modified graphite is product obtained by modifying graphite with concentrated sulfuric and nitric acids. Material is characterized by that, in wavelength band from 2 to 5 cm at thickness of material up to 0.1 mm, transmission coefficient is decreased from -40 to -85 dB.

EFFECT: improved performance characteristics.

6 cl, 1 tbl, 2 ex

FIELD: physics, engineering.

SUBSTANCE: device has substrate, on which fractal topology is formed, with fractal level M no less than three. First fractal level module has 1+N circles with radius R, while center of each of N circles is placed on first circle, forming a central-symmetric shape, and circle with 2R radius, center of which matches center of first circle, and envelopes circles with radius R, and its coupling points with these circles are centers of placement of modules of first fractal level during construction of second level module, which envelope circle with radius 4R, and then topology is built in the same way. fractal topology is formed by slits, width and depth of which is no less than 0.1 mcm.

EFFECT: higher efficiency.

5 cl, 8 dwg

FIELD: production of the materials intended to protect people in industrial, administrative and living premises against action of electromagnetic fields of the radio-frequency range.

SUBSTANCE: the invention is pertaining to production of materials intended to protect people in industrial, administrative and living premises against action of electromagnetic fields of the radio-frequency range generated by operation of electrical circuits, electric appliances, mobile and radio telephones, and also for protection of the people against a geopathogenic environmental activity. The material based on schungite mineral represents a three-layered material, two exterior layers of which consist of a carton or a plastic sheet, on each side of which a printing ink containing fragments of a schungite mineral is applied, and in the capacity of the middle layer the aluminum foil is used. At that the layers are connected by a glue. To increase the strength of the three-layered material it is drawn for example through rollers or placed under a press. The printing ink contains particles of the schungite mineral, these particles have dimensions of 5-10 microns and make 90 % of the mass of the printing ink, in which they are dispersed. The printing ink containing the particles of the schungite mineral makes 6-7 % of the mass of the board or 3-3.5 % of the mass of the plastic material. The layer of the carton has a depth of 0.3 mm, and the layer of plastic material has the depth of 0.6 mm. The technical result of the invention is production of the material from the accessible raw being an effective and low-cost material for protection of people against action of electromagnetic fields of the radio-frequency range generated in the process of the operation of electric appliances, electrical circuits, at exploitation mobile and radiophones, and also from a geopathogenic action of the environment.

EFFECT: the invention ensures production from an accessible raw material of an effective and low-cost material for protection of people against action of the radio-frequency range electromagnetic fields generated during operation by different electrical appliances, circuits and telephones.

5 cl, 4 ex, 1 tbl

FIELD: photoelectric equipment.

SUBSTANCE: device has glass case mounted in housing. There is float inside the case. The float is mounted between IR transmitter and receiver in opposition to entrance and exit windows of the housing. Vertical access hole is made in housing, which has to be the float level gage. The window is oriented in such a manner that external light disturbance passes it through at angle of 90° to axis of photo detector beam. Case has opaque and grooved walls; parts intended for windows are made transparent. Entrance window is made in form of through double cone-shaped groove with light absorbing coating on its wall. Photochromic filter is mounted at the entrance of radiation source. The wall has slant provided with mirror surface and reflecting ring-shaped diaphragms. Access hole is provided with removable aid for attenuating external light illumination.

EFFECT: improved reliability of operation under excessive sun illumination.

3 cl, 4 dwg

FIELD: protection of microelectronic information recorders; protected onboard flight information storage units of aircraft and helicopters.

SUBSTANCE: proposed onboard protective unit consists of layers located in succession: outer shock-and-heat resistant layer made from high-temperature metals, intermediate heat protective layer made from refractory dry porous material and inner heat protective layer made from water-containing material enclosed between outer and inner heat-transfer gaskets. Outer shock-and-heat resistant layer is perforated with through drainage holes whose diameters do not exceed half thickness of outer shock-and-heat resistant layer; heat-transfer gaskets are made from metal foil; outer heat-transfer gasket is perforated and inner heat protective layer is used with at least two crystallohydrates; temperature of dehydration of one of crystallohydrates exceeds temperature of other crystallohydrate by no less than two times.

EFFECT: enhanced efficiency of protection of object.

1 dwg

FIELD: protection from electromagnetic emission.

SUBSTANCE: mesh of electric-conductive material is positioned on dielectric transparent film with applied transparent electric-conductive layer, made either of indium, or of tin, or of indium/tin alloy with thickness, approximately equal to 0,1 of skin layer, and the very mesh is applied with thickness not exceeding skin-layer by printer or plotter using electric-conductive compound, consisting of ultra-dispersive electric-conductive powder with stable electric conductivity and average size of particles 10,0-600,0 nm, polymer linking component, organic solvent and surfactant with certain ratio of components.

EFFECT: forming of transparent screens, screening properties of which do not depend on falling angle of electromagnetic emission, also light and simple to manufacture.

2 tbl

FIELD: engineering of protective radio-electronic means, possible use as a protective screen.

SUBSTANCE: reflector is made in form of rotor with radio-reflective surfaces connected thereto, made in form of blades. Blades are made of three layers of radio-transparent film, average layer of which is metallized by aluminum. In source state blades are wound on rotor body. On back end surface of rotor, rotation engine is mounted. Rotor is turned by means of traction, formed by rotation engine. Blades are driven into working state by centrifugal forces and following supercharge by remainder pressure from previously activated rotation engine. Blades can be capable of altering rotation angle relatively to their axis.

EFFECT: electromagnetic emission reflector has insignificant mass-dimensional characteristics, is capable of forming a radiolocation shadow of large dimensions and capable of maintaining maximal effectiveness of radiolocation interference in given direction along whole portion of object flight trajectory in space.

3 dwg

FIELD: engineering of equipment for protecting microelectronic information registers, can possibly be used for engineering of protected onboard flight information storage devices for airplanes and helicopters.

SUBSTANCE: device for thermal and mechanical protection of object allows to maintain safety of microelectronic register under effect from combined external destructive factors: mechanical impacts, overloads, vibration effects, static pressure, and also fire-based factors with time of effect up to one hour with all-around fire enveloping at temperature up to 1100°C. Aside from that, invention provides for safety of accumulated information after long, up to 10 hours, effect of smoldering burning at temperature up to 260°C. protection of microelectronic equipment from effect of destructive factors, in accordance to invention, is realized by using multi-layer casing, containing serially positioned in depth direction protective layers: external, intermediate and internal, and also biomorphic heat-protection cover on the outside surface of external layer, while each layer and cover perform certain protective function. External layer is meant for providing impact and fire resistance of protective cover due to high mechanical and heat resistance of metals used to manufacture external layer. Intermediate layer meant for passive heat protection of preserved object, realizes functions of heat isolator due to low heat conductivity of fire-resistant dry porous material forming this layer. Internal layer realizes active heat protection of microelectronic register. To reach aforementioned goal it is formed of crystalline compositions, containing crystallization water - crystalline hydrates, under effect from external heat consuming external heat and thus during whole time of heat-caused dehydration upholding temperature inside protected volume to be below temperature of heat decomposition of crystalline hydrate. To increase efficiency of heat protection, internal layer on both sides is covered by metallic heat-reflective inserts and it is formed of no less than two crystalline hydrates with different dehydration temperatures.

EFFECT: increased efficiency.

1 dwg

FIELD: engineering of equipment for protecting microelectronic information registers, can possibly be used for engineering of protected onboard flight information storage devices for airplanes and helicopters.

SUBSTANCE: device for thermal and mechanical protection of object allows to maintain safety of microelectronic register under effect from combined external destructive factors: mechanical impacts, overloads, vibration effects, static pressure, and also fire-based factors with time of effect up to one hour with all-around fire enveloping at temperature up to 1100°C. Aside from that, invention provides for safety of accumulated information after long, up to 10 hours, effect of smoldering burning at temperature up to 260°C. Protection of microelectronic equipment from effect of destructive factors, in accordance to invention, is realized by using multi-layer casing, containing serially positioned in depth direction protective layers: external, intermediate and internal, and also biomorphic heat-protection cover on the outside surface of external layer, while each layer and cover perform certain protective function. Biomorphic heat-protective cover, meant for passive heat protection of protected object, provides aforementioned protection due to significant increase of volume and porosity level of cover material under effect from flames, leading to substantial increase of thickness and heat resistance of cover. External layer is meant for providing impact and fire resistance of protective cover due to high mechanical and heat resistance of metals used to manufacture external layer. Intermediate layer meant for passive heat protection of preserved object, realizes functions of heat isolator due to low heat conductivity of fire-resistant dry porous material forming this layer. Internal layer realizes active heat protection of microelectronic register. To reach aforementioned goal it is formed of crystalline compositions, containing crystallization water - crystalline hydrates, under effect from external heat consuming external heat and thus during whole time of heat-caused dehydration upholding temperature inside protected volume to be below temperature of heat decomposition of crystalline hydrate. To increase efficiency of heat protection, internal layer on both sides is covered by metallic heat-reflective inserts and it is formed of no less than two crystalline hydrates with different dehydration temperatures.

EFFECT: increased efficiency.

1 dwg

Up!