Complex admixture for concrete mix, and method for its manufacture
SUBSTANCE: complex admixture for concrete mix contains Giperlit hyperplasticising agent and Taunit carbon nanostructured material (CNM) at the following component ratio, wt %: Giperlit hyperplasticising agent - 99.5-99.7, Taunit carbon nanostructured material - 0.3-0.5. A preparation method of the proposed complex admixture consists in ultrasonic dispergation of Taunit carbon nanostructured material in Giperlit hyperplasticising agent during 3-7 minutes by means of UZG13-0.1/22 ultrasonic generator.
EFFECT: increasing growth rate of strength of concretes at early hardening stage at preservation of their high final strength; increasing freeze resistance and water non-permeability.
2 cl, 1 tbl
The invention relates to the field of construction, namely the composition of complex additives for concrete mixtures and methods for their preparation, and may find application in the manufacture of concrete products and structures.
Known method of preparing a modified fiber-reinforced concrete mixture and the modified fiber-reinforced concrete mix (EN 2397069 C1, pub. 20.08.2010), which is used for road and airfield construction, in the manufacture of prefabricated and monolithic concrete products and structures.
This mixture comprises Portland cement M500, a fiber of Mixart" steel, filler, plasticizer additive "Polyplast SP-3" multi-layer carbon nanotubes (CNTS) in the following ratio, kg/m3mix: Portland 320-330, filler 1900-1920, steel fiber 70-80, superplasticizer 1,6-1,72, multiwall CNTS are 0.010 to 0.015, water mixing 130-145.
The method of preparation is that the mixing in the mixer of Portland cement, steel fiber, filler, plasticizer and mixing water, previously conducted the dispersion of Portland cement and superplasticizer in linear induction rotator obtained dry mixture together with the mixing water and multilayer carbon nanotubes treated in an ultrasonic disperser.
N�prosperity of this invention is the low strength of the resulting concrete, as well as the low efficiency of the process of preparation of the mixture.
Known concrete mixture (EN 2355656 C2, pub. 20.11.2008), including cement M500, filler, water and basalt fiber, modified substance selected from the group comprising polyhedral multilayer carbon nanostructures fulleroid type and multilayer carbon nanotubes, taken in an amount of 0.0001-0.005 wt.h. one wt.h. basalt fiber, wherein the filler blend comprises a filler selected from the group comprising a mixture of gravel with a mixture of sand and gravel aluminosilicate microspheres, and optionally the concrete mixture contains a plasticizer polynaphthalenesulfonate of sodium at the following ratio (% wt.): cement 24-48 filler 30-60 modified basalt fiber 2-6, a plasticizer 0.9 to 1.1, water - the rest.
However, the use in the present invention, the plasticizer on the basis of polynaphthalenesulfonate sodium is not possible to obtain concrete with a high brand strength and durability.
The prototype is the modifier necessary building materials (EN 2482082 C2, pub. 20.02.2013) containing carbon nanostructured materials (CNM), a filler and a plasticizer, wherein the carbon nanomaterial is introduced in the form of nanotubes "Taunit", as the plasticizer mixture contains polyvinylpyrrolidone, ka�ETS filler - polyethylene glycol PEG-1500 and additionally contains sodium bicarbonate and citric acid with the following ratio of components, wt.%: CNM "Taunit" 0,1-8, polyvinyl-pyrrolidone and 0.1-8, sodium 5,5-11,5, citric acid 5,5-11,5, polyethylene glycol PEG-1500 - else.
The use of this complex additives can improve the strength of construction materials. The disadvantage of this invention is the low mobility of the concrete, low strength concrete in the early stages of hardening and low durability of the resulting concrete.
A method of preparing a complex additives for concrete mix, which consists in an ultrasonic dispersion of carbon nanotubes "Taunit" in the solution of the plasticizer S-3 and alcoholic suspension (gabidoullin M. G., Husin A. F., R. Rakhimov Z. Ultrasonic treatment is an effective method of dispersing carbon nanotubes in composite construction // Building materials. 2013. No. 3. P. 57-59).
The use of this mixture can improve the strength of concrete. The disadvantage is the low strength of concrete in the early stages of hardening.
The object of the present invention is a sharp increase in the growth rate of the concrete strength in the early stages of hardening, providing high-grade strength, high frost resistance and water resistance, and that�same uniform distribution of carbon nanomaterial in its structure.
The technical result - the high strength characteristics of concrete in the early stages of hardening, high brand strength.
The result is achieved in that in a complex additive for concrete mixtures containing a plasticizer and carbon nanostructured material "Taunit" according to the invention comprises as the plasticizer - giperplasticizer "Hyperlite", with the following ratio of components, wt.%:
Specialiteter "Hyperlite" - be 99.5 to 99.7
Carbon nanostructured material "Taunit" - 0.3 to 0.5.
The result is achieved in that in the method of making complex additives for concrete mix, which consists in an ultrasonic dispersion of carbon nanostructured material "Taunit" in the plasticizer according to the invention, the nanostructured carbon material is subjected to ultrasonic dispersion in hyperplasticity "Hyperlite" for 3-7 minutes with an ultrasonic generator USG-0,1/22. Ultrasonic dispersion characterized by the following parameters: frequency 20,35-23,65 kHz, power 100 W, wavelength 0,127·105-0,147·105M.
For this complex additives used carbon nanostructured material "Taunit" - coaxial multi-layer carbon nanotubes with an outer diameter of 8 to 15 nm and a length of more than 2 μm. The number of slo�in one tube 6-10.
Giperplasticizer "Hyperlite" copolymer-based polyoxyethylenated derivatives of unsaturated carboxylic acids, is a light-brown liquid, aqueous solution with a dry matter content of 30-35%.
Complex additive were prepared by ultrasonic dispersion. Carbon nanostructured material "Taunit" was subjected to ultrasonic dispersion in hyperplasticity "Hyperlite" for 3-7 minutes with an ultrasonic generator USG-0,1/22, with the following component ratio, wt.%:
Giperplasticizer "Hyperlite" - be 99.5 to 99.7
Carbon nanostructured material "Taunit" - 0.3 to 0.5.
Further, the additive was introduced into the concrete mixture in the form of an aqueous solution of working concentration with mixing water in an amount of 1-1,5% by weight of cement in terms of dry substance.
For the preparation of concrete mix production the composition used cement M400 HRC D20 Wolski plant that meets the requirements of GOST 10178-85, sand Kamsko-Ustinsky Deposit that meets the requirements of GOST 8736-93 and GOST 8735-88 and rubble Kamsko-Ustinsky deposits that meet the requirements of state standards for concrete, with the following ratio (mass.h.):
Cement:aggregate:sand = 1:1,31:2,53
Water was added to the concrete mix to achieve equal mobility (class P2) �about GOST 7473-94. Water-cement ratio of the composition without the additive was - 0.43, with a complex additive - 0.32, with the addition of the prototype - 0,36.
From concrete mixtures were produced samples - cubes with dimensions 10×10×10. After 1, 3, 7, 28 days normal curing the samples were subjected to mechanical tests. The strength of the samples was determined in accordance with GOST 18105-86, frost - GOST 10060.0-95, and the resistance - according to GOST 12730.5-84.
The composition of complex additives and mechanical test results of the concrete are shown in the table. Were also conducted tests of concrete and concrete with the additive analogue and without additives.
Based on these data it can be concluded that the concrete with the use of complex additives on the first day has a compressive strength higher 87-131%, 3 day - 50-58%, on day 7 - 49-55%, and 28 days 39-45% compared with the prior art. At the age of 28 days frost resistance increased to 100 cycles, and the resistance - at one stage.
The obtained results allow assert that the complex additive increases the rate of strength development of concrete in the early stages of hardening and allows to achieve a high final strength, frost resistance and water resistance.
1. Complex additive for concrete mixtures containing a plasticizer and carbon nanostrukturirovanie�th material "Taunit",
characterized in that the plasticizer is used giperplasticizer "Hyperlite", with the following ratio of components, wt.%:
Giperplasticizer "Hyperlite" is 99.5-99.7 á,
Carbon nanostructured material "Taunit" - 0.3 to 0.5.
2. Preparation of complex Supplement, which consists in dispersion of carbon nanostructured material "Taunit" in the plasticizer, characterized in that the nanostructured carbon material is subjected to ultrasonic dispersion in hyperplasticity "Hyperlite" for 3-7 minutes with an ultrasonic generator USG-0,1/22.
SUBSTANCE: protective mix of road pavements includes a black organic binding substance, a hardening modifier and a solvent in the following ratio, wt %: black organic binding substance - coal tar asphalt 45-55%; hardening modifier - acetone 4-6%; adhesive additive STARDOP 130P 1-3 wt %; solvent is the rest.
EFFECT: resistance to deformations, heat resistance, protection of road pavement against water and temperature difference.
7 cl, 1 tbl
SUBSTANCE: high-strength concrete is made from a mixture containing portland cement, sand, crushed stone, water and a complex additive made of sole of ferric hydroxide (III) with density equal to 1.021 g/cm3, hydrogen index 4.5-5.5 and plasticiser, the plasticiser is a superplasticiser POLYPLAST-3MB, at the following ratio of components, wt %: 15.50-16.00 and 84.00-84.50 accordingly, at the following ratio of components of the raw mix, wt %: portland cement 19.95-26.85; sand 21.80-24.70; crushed stone 42.40-44.50; specified additive 1.55-2.10; water 7.40-8.75.
EFFECT: higher strength of concrete during compression.
3 dwg, 1 tbl
SUBSTANCE: high-strength concrete produced from a raw mix containing portland cement, sand, crushed stone and water and a complex additive containing sol of berlin blue with density equal to 1.013 g/cm3, hydrogen index 4.7-5.3 and plasticiser SikaAer 200S at the following ratio of components, wt %: 16.50-17.00 and 83.00-83.50 and accordingly, at the following ratio of components of a raw mix, wt %: portland cement 24.30-31.70; sand 23.60-26.00; crushed stone 36.40-39.60; specified additive 0.60-0.80; water 7.70-9.30.
EFFECT: increased frost resistance of concrete.
SUBSTANCE: invention relates to composition of a complex additive for concrete and mortar. The complex antifreeze additive for concrete and mortar contains an organic component, potassium carbonate and sodium carbonate, the organic component being a mixture of hydroquinone, pyrocatechol and resorcinol in ratio of (0.4-0.62):(6.51-8.19):(0.4-0.98) and additionally sodium sulphate, sodium sulphite, a mixture of thiocyanate and sodium thiosulphate, sodium sulphide, sodium nitrite and water, with the following ratio of components, wt %: mixture of hydroquinone, pyrocatechol and resorcinol 0.04-1.87; potassium carbonate 3.74-4.34; sodium carbonate 1.62-2.17; sodium sulphate 0.5-10.3; sodium sulphite 0.14-1.83; mixture of thiocyanate and sodium thiosulphate 15.4-27.2; sodium sulphide 0.03-0.06; sodium nitrite 20.2-39.1; water - the balance up to 100%. The invention is developed in subclaims.
EFFECT: high antifreeze effect of the additive while maintaining 28-day compression strength with normal hardening.
2 cl, 2 tbl
SUBSTANCE: invention relates to structural materials and specifically to additives for concrete mixtures and can be used in making structures, articles and components in both industrial construction and construction of residential structures. The additive for concrete mixture contains Leuconostoc mesenteroides microorganisms cultured on a synthetic culture medium, and additionally microsilica, with the following ratio of components, wt %: Leuconostoc mesenteroides microorganisms cultured on a synthetic culture medium 33-44 and microsilica 56-67.
EFFECT: high consistency of the concrete mixture while preserving strength of the concrete.
SUBSTANCE: nanomodifier of construction materials and method of its production can be used in construction technology. The nanomodifier of construction materials comprising a mixture containing carbon nanomaterial (CNM), a filler and a plasticiser, and the CNM is added in the form of nanotubes "Taunit", as a plasticiser the mixture contains polyvinylpyrrolidone, as a filler - polyethylene glycol PEG-1500, and additionally contains sodium hydro-carbonate and citric acid with the following components ratio, wt %: CNM "Taunit" 0.1-8, polyvinylpyrrolidone 0.1-8, sodium hydro-carbonate 5.5-11.5, citric acid 5.5-11.5, polyethylene glycol PEG-1500 - the rest. In the method of production of the nanomodifier of construction materials from the said mixture the nanomodifier is made in the form of effervescent tablets containing CNM "Taunit", basic and acidic components of the effervescent degree, tableting of anhydrous components is carried out by melting the polyethylene glycol PEG-1500 at a temperature above the temperature of its crystallisation, the molten polyethylene glycol PEG-1500 is divided into two parts, the citric acid, polyvinylpyrrolidone and CNM "Taunit" is added to one part and mixed, the sodium hydro-carbonate is added to the second part, and before feeding the melt to the mould the resulting mixtures of melts are filled into the preheated process chamber of a planetary mill and is processed in it for 30 min at a temperature of 75 or 80°C, after that the melt is poured into the moulds with their subsequent cooling. The invention is developed in the dependent claims.
EFFECT: increase of strength of construction materials.
2 cl, 5 dwg
SUBSTANCE: invention relates to compositions of chemical additives for concrete mixtures and mortar and can be widely used in producing monolithic and prefabricated structures, mainly for hydraulic engineering structures and road concrete. The additive contains superplasticiser S-3 and glycerine, with the following ratio of components (pts.wt): superplasticiser S-3 - 35-95; glycerine - 5-65. The additive can additionally contain carbamide in amount of 5-45 pts.wt per 100 pts.wt of the main composition.
EFFECT: high frost-resistance of concrete, high strength.
2 cl, 1 tbl, 5 ex
SUBSTANCE: method of producing a protective and decorative coating (verisons). The invention relates to construction and specifically to methods of protective and decorative finishing of surfaces of concrete and brick structures. The method of producing a protective and decorative coating according to the first version involves preparation of the surface and depositing a coating on said surface. The coating is formed from elements. The elements used are coloured glass deposited on the inner side and a hardened composition, with the following ratio of components, pts.wt: polyvinyl acetate dispersion with content of dry substance of 49-51% 5-10; alabaster 7-8, mixture of dioxane alcohols and their high-boiling ethers with open-cup flash-point of 130-140°C 0.5-1.0, di(alkylpolyethylene glycol)ether of phosphoric acid 0.1-0.2, water 4-8. An adhesive composition is deposited on the hardened surface of said composition of each element, with the following ratio of components in pts.wt: cement 3.2-3.35, quartz sand 3.6-3.8, dolomite powder 1.2-1.3, water 1.8-2.1. A second version of the method of producing a protective and decorative coating on the surface of building structures is described.
EFFECT: high adhesion strength, water resistance and resistance to sodium hypochlorite solution.
2 cl, 2 tbl, 16 ex
SUBSTANCE: invention relates to construction materials, specifically to modifying additives for producing high-strength mortar and composite gypsum concrete, used in construction of residential and public buildings. The additive contains 30% solution of polycarboxylate Sika ViscoCrete 225P, 30% solution of polycarboxylate Glenium Ace 30 or Ace 430; solution of anti-foaming agent Degressal SD-21, 5% carbamide solution, 10% sodium gluconate solution and 5% solution of re-dispersible copolymer substance Neolith - P 3300, with the following ratio of components, wt %: Sika ViscoCrete 225P solution - 20.0-28.0; Glenium Ace 30 or 430 solution - 23.0-25.0; anti-foaming agent Degressal SD-21 - 0.08-0.15; carbamide solution - 20.5-22.4; sodium gluconate solution- 14.0-16.0; Neolith-P 3300 solution - 14.42-16.45, obtained by mixing components until complete homogenisation of the obtained additive solution.
EFFECT: high strength and water-resistance of the obtained materials.
2 tbl, 9 ex
FIELD: materials industry.
SUBSTANCE: invention is related to the technology of building materials. Additive to cement, the mixture on its basis, contains (in terms of non-hydrated basis) wt.%:
reducer for hyperstoichiometric oxygen contained in the input to the cement phase 12CaO+7A2O3, hydration products in powder and water-soluble form as one or as a mixture, where one reducer has a standard electrode potential (SP) with above minus SP equal to minus 0.338B, 14-18, oxidant for an iron cation (II) as part of a conglomerate of the mixed crystals [m(2CaO·Fe2O3) + nCaO + pFeO] at the weight ratio of m:n:p (6 - 9): (2 - 4): (0.5 -1.5), or a crystalline phase of 9CaO Fe2O3 FeO, in powder and water-soluble form as one or a mixture, where one oxidant has an SP value higher than SP values equal to 0,771B, 5-20, particulate oxidation catalyst - substance or vapour mixture, from the group of silica gel, microsilica, tripoli, diatomaceous earth, metakaolin, flask, 20-35, hardening accelerator 2-12, plasticizer 18 - 30, with the content of additive in the amount of 0.5 - 3.5 wt.% of the ceramic part of cement. The method of producing the above mentioned additive by subsequent filling of a mixing and/or dispersing device with the specified reducer, oxidant, catalyst, accelerator and plasticizer, dispersing the resulting mixture till homogeneity. As for the other option, the method of producing the above mentioned additive by filling the mixing and/or dispersing device with these components, the specified reducer is pre-dispersed with the catalyst, in their mixture water-repellent agent is introduced, the hydrophobic mixture is introduced with these oxidants, the accelerator and plasticizer, each with an additional hydrophobisator portion, with the content of hydrophobizator in the additive as 0.02 - 0.16 wt.% of the ceramic part of cement, being dispersed till homogeneity. The invention has been developed in the Subclaims.
EFFECT: increased strength and durability of cementitious materials and cement-based products from underburned clinker.
21 cl, 2 ex, 3 tbl
SUBSTANCE: method is based on irradiating a surface with a moving laser beam in areas of the surface of the material with an absorption coefficient of not less than 3·104 cm-1 at the laser wavelength, wherein each area is irradiated using a series of laser pulses with pulse duration of not more than 30 ns, and energy density F of the laser beam in the irradiated area is set in the range F=0.005-1.0 J/cm2 to enable splitting of the surface layer of the material without melting and forming on the surface of the material sub-micrometre cracks, slits and flakes with size ranging from 0.05 mcm to 0.8 mcm.
EFFECT: simplified method of producing micro- and nanostructures for a wide range of materials.
12 cl, 1 tbl, 7 dwg
FIELD: physics, signalling.
SUBSTANCE: invention relates to identification of material resources and can be used to label electroconductive articles. The method of making and installing non-reproducible identification label on an electroconductive article includes applying an identification number, an information grid and a non-reproducible matrix, as well as combined input of the identification number and the non-reproducible matrix into a database. The non-reproducible matrix is formed in advance separately from the article on a nanofilm by random point-by-point evaporation of areas of the nanofilm to obtain perforations of different size and shape or obtaining bulging areas of the surface of different size and shape on the nanofilm during electric discharge treatment thereof, after which the nanofilm is placed on the article by pressure sintering.
EFFECT: invention enables to obtain a non-reproducible identification label on an article, which enables to apply information and prevent forgery.
3 cl, 6 dwg, 4 ex
SUBSTANCE: invention relates to the purification of finely-disperse organic substances from water-soluble admixtures and can be applied in the chemical, petrochemical, pharmaceutical, food branches of industry. Described is a method of removing water-soluble admixtures from suspensions of organic products by repeated repulpation-decantation with the application of water, containing metal nanoparticles, as a washing liquid. At the first and second stages of the repulpation used is water, passed through a layer of carbon with high reaction ability, containing nanoparticles of metal oxide from the group, including nickel oxide, nickel and chrome oxide, nickel and iron oxide. At the third stage of the repulpation used is water, containing nanoparticles of metal from the group, including iron, aluminium, nickel, platinum. The fourth repulpation is carried out with the application of water, containing a micellar solution of silver or gold as a washing liquid.
EFFECT: invention provides the reduction of loss of the target substance with a washing liquid, reduction of the volume of sewage waters, requiring purification from organic compounds and water-soluble admixtures and increase of the consumer properties of organic substances.
10 cl, 3 dwg, 4 tbl, 14 ex
FIELD: process engineering.
SUBSTANCE: invention relates to production of nanocement. Proposed process comprises grinding by crushing rolls of Portland cement clinker, mineral siliceous additive containing SiO2 in amount of at least 30 wt % and gypsum stone to the following grain size, wt %: 15-25 mm - 10-15; 5-7 mm - 15-20; powder - 60-75. Obtained mix is homogenized in the mixer by forced mixing. Then, it is subjected to mechanochemical activation in three-chamber ball mill to specific surface of 300-900 m2/kg. Polymer modifying agent is added to said ball mill which contains at least 60 wt % of sodium naphthalene sulphonate to form on Portland cement grains the solid nanocapsules of 20-100 nm in depth composed by C10H7SO3CaNa at the following ratio of initial components, wt %: Portland cement clinker - 30.0-90.0, gypsum stone - 0.3-6.0, modifying agent - 0.5-2.0, said mineral siliceous additive making the rest. Invention relates also to nanocement thus produced.
EFFECT: higher properties of cement to class of 72,5-82,5, lower costs, fuel saving, decreased emissions of NOx, SO2 and CO2.
2 cl, 7 dwg, 11 tbl
FIELD: measurement equipment.
SUBSTANCE: scope of application: for carbon monoxide detection in air. Invention consists in the following: manufacturing method includes obtaining nanocrystalline wide gap semiconducting oxides MeO (SnO2, ZnO, In2O3), obtaining sols of quantum dots of narrow gap semiconductors CdX (X=Se, Te, S) and oxides impregnation with sols of quantum dots followed by drying for formation of heterocontacts MO/CdX.
EFFECT: providing possibility of decrease of semiconductive sensor materials temperature to the room temperature upon detection of carbon monoxide in air and providing high sensitivity and low energy consumption of sensor.
SUBSTANCE: invention relates to medicine, namely to surgery and diagnostic research methods, in particular to intraoperative visualisation. The targeted delivery of conjugates of nano-sized anti-Stokes phosphori (NAP) with molecules, selectively binding with a target biostructure, subjected to visualisation is carried out. Irradiation of a pathological focus by infra-red radiation in the range of 975-980 nm is carried out. Intraoperative visualisation of the luminescence of the surface and subsurface pathological foci is performed in the blue spectral range by the naked eye. Deep optic probing by means of an optic probe is performed to register the pathological foci, located at the depth, mainly, in the infra-red spectral range.
EFFECT: method provides high sensitivity of the differentiation of the pathological foci from normal tissues, high resolution of visualisation, makes it possible to differentiate the surface and subsurface pathological foci by the naked eye, and the pathological foci, located at the depth, by means of the optic probe.
4 cl, 3 ex, 7 dwg
SUBSTANCE: molecular fullerene C60 or fullerene-containing soot with an additive of a sulphur-containing compound is subjected to pressure of 0.2-12 GPa and temperature of 0-2000°C. The sulphur-containing compound used is carbon sulphide, a mercaptan group compound or a product of reacting a mercaptan group compound and elementary sulphur. The structure of the obtained high-hardness carbon material is formed by covalently bonded layers of fullerene molecules which are two-dimensionally polarised along a second-order axis of rotation.
EFFECT: hardness of the obtained material is greater than 10 GPa.
4 cl, 5 dwg, 6 ex
SUBSTANCE: invention relates to the field of optical nanotechnologies, optical instrument-making, rocket, space, laser optics, quantum and optical nanoelectronics, useful for display, television and medical technology. The optical coating is a thin layer (100 nm or less) coating based on carbon nanotubes with the magnitude of inhomogeneities on the nanometer level. For application of carbon nanotubes on the substrate a slot CO2-laser is used with the laser beam controlled in power. The optical element consists of the coating based on carbon nanotubes and a hygroscopic substrate. The substrates of KBr, NaCl, KCl are used for providing functioning of this optical coating up to the middle infrared region of the spectrum. The coating is able to function in the infrared regions of the spectrum.
EFFECT: increased moisture resistance of the coating.
SUBSTANCE: invention refers to optical sensors recording molecular groups and working in the visible frequency range. A renewable carrier for surface-enhanced Raman scattering detection consists of nanostructured SERS-carrier and a passive dielectric layer.
EFFECT: invention enables eliminating the temporary degradation of the working surface exposing on the atmosphere, increasing the useful life of the SERS-carrier for molecular group detection.
SUBSTANCE: usage: for production of materials based on semiconductors, dielectrics and metals, as a stable material or metastable phase-precursor of this material. The essence of the invention consists in that the composite nanomaterial comprises structural elements different in atomic composition, the regions of adjacent structural elements adjacent to each other consist of sub-elements heterogeneous in structure, which at least in one direction have sizes that are multiple to the lattice constant and/or quarter of wavelength of valence electrons in their or adjacent structural elements.
EFFECT: ensuring the possibility of forming in the composite nanomaterial of nanostructured (low- or nano-sized) state.
FIELD: magnetic materials whose axial symmetry is used for imparting magnetic properties to materials.
SUBSTANCE: memory element has nanomagnetic materials whose axial symmetry is chosen to obtain high residual magnetic induction and respective coercive force. This enlarges body of information stored on information media.
EFFECT: enhanced speed of nonvolatile memory integrated circuits for computers of low power requirement.
4 cl, 8 dwg