RU-2861498-C1 - REFRACTORY MARKING COMPOSITION

RU2861498C1RU 2861498 C1RU2861498 C1RU 2861498C1RU-2861498-C1

Abstract

FIELD: security. SUBSTANCE: invention can be used for marking explosives. The refractory marking composition contains 69-70 mas.% of a set of coding elements, 30-31 mas.% of a magnetic phase, and a refractory component in an amount of 20-50 mas.% of the total content of the magnetic phase and the set of coding elements. The sources of coding elements are metal compounds with a content in the earth's crust of less than 0.05 mas.%. The basis of the magnetic phase is iron (III) compounds, and the basis of the refractory component is ZrO 2 , or Al 2 O 3 , or ZrO 2 -Al 2 O 3 containing 5-20 mas.% Al 2 O 3 , or Al 2 O 3 -MgO containing 10-35 mas.% MgO. The composition consists of spherical particles with a size of 200-5000 nm and can be obtained by aerosol pyrolysis. EFFECT: strengthening of the particles of the marking composition and reducing the likelihood of their destruction after an explosion. 3 cl, 1 dwg, 2 tbl, 2 ex

Inventors

Nasibulin Albert Galiievich
Kondrashov Vladislav Andreevich
Goldt Anastasiia Evgenevna
Krasnikov Dmitrii Viktorovich
Raginov Nikita Ivanovich

Dates

Publication Date: 20260505
Application Date: 20250820

Claims (3)

1. A refractory marking composition consisting of a set of coding elements, the sources of which are metal compounds with a content in the earth's crust of less than 0.05 wt.%, and a magnetic phase based on iron (III) compounds, taken in a ratio of 69-70 wt.% and 31-30 wt.% , respectively, and a refractory component based on ZrO2 , or Al2O3 , or ZrO2 - Al2O3 , or Al2O3 - MgO, taken in a mass ratio of 20 to 50 wt.% of the total content of the magnetic phase and the set of coding elements.
2. A refractory marking composition according to claim 1, characterized in that the refractory component based on ZrO 2 -Al 2 O 3 contains from 5 to 20 wt.% Al 2 O 3 or Al 2 O 3 -MgO with an MgO content of 10 to 35 wt.%.
3. A refractory marking composition according to claim 1, characterized in that it is spherical particles ranging in size from 200 to 5000 nm, obtained by the method of aerosol pyrolysis.

Description

AREA OF TECHNOLOGY The invention relates to the field of ensuring security by detecting materials requiring identification to establish the manufacturer, batch number, and production date. This invention relates to a technology for marking various objects with markers in the form of a marking composition containing a set of chemical elements that form a code, a magnetic phase for easy sampling of the material after an explosion, and a refractory component. LEVEL OF TECHNOLOGY Product marking is actively used by businesses and organizations to authenticate or verify various documents, expensive equipment, antiques, and other items. A separate area of marking is the marking of explosives (EE), aimed at combating the theft of EE and their use for terrorist purposes. Markers intended for use in explosives must meet a number of requirements: long service life, difficulty in copying (difficulty in creating a counterfeit), inertness with respect to explosives and their decomposition products, convenient sampling for analysis, and unambiguous reading of the information. Patents RU 2368591 and RU 2495860 describe approaches to marking explosives using polymer chains of varying lengths. Each technical indicator is assigned an identifier in the form of a polymer with a corresponding molecular chain length and a corresponding "escape time" (or "retention time") on a chromatogram. To facilitate particle detection after detonation, UV-fluorescent dyes are added to the markers. However, such marker additives have low thermodynamic stability and can partially disintegrate during the explosion, forming new compounds with shorter polymer chains. This compromises the accuracy and reliability of code identification. US Patent 3,772,099 proposes a method for coding explosives using a phosphor, comprising a finely dispersed commercially available phosphor and a phosphor doped with at least one lanthanide element. The mixture is mixed with an aqueous solution of potassium silicate and dried, producing large particles ranging in size from 0.5-0.7 mm. After sampling, the marker can be identified using the emission lines emitted by the phosphor upon exposure to UV radiation. Different doping options with lanthanide elements allow for the creation of specific code combinations. Patent RU 2637334 C2, "Marking Additive," describes an approach to covertly marking products using coding particles with a chemical code. The microsphere-shaped particles are a composite consisting of a magnetic phase and a special set of chemical elements, with a content of less than 0.05% by weight in the Earth's crust, forming a binary code, where 1 indicates the presence of the element; 0 indicates the absence of the element. The particles containing the coding information are first visualized using scanning electron microscopy, and in the second stage, using an energy-dispersive analyzer, the marker composition is determined. Both stages are performed on the same equipment, ensuring rapid analysis. This approach to establishing a marker code is similar to our invention and was used as a prototype. However, when using the marking composition for covert marking of explosives, there is a risk of microsphere destruction after an explosion. Therefore, to strengthen the markers , our invention proposes additionally introducing a refractory component based on ZrO2 or Al2O3 , or solid solutions based on ZrO2 - Al2O3 or Al2O3 - MgO . DISCLOSURE OF THE ESSENCE OF THE INVENTION The technical problem that the present invention is aimed at solving is the production of a refractory magnetic marking composition in the form of microspheres with a size from 200 nm to 5 µm, obtained by the method of pyrolysis of aerosols, which will allow them to be used as markers for the identification of industrial explosives, both before and after the explosion. The problem was solved by the present invention, in particular, by introducing into the composition of a magnetic marking composition consisting of a chemical code in the form of a certain set of coding elements, the sources of which are metal compounds with a content in the earth's crust of less than 0.05 wt. %, a ferrimagnetic phase based on iron (III) compounds and, mainly, a refractory component. The composition consists of a set of coding elements, the sources of which are metal compounds with a content in the earth's crust of less than 0.05 wt. %, and a magnetic phase based on iron (III) compounds, taken in a ratio of 69-70 wt. % and 31-30 wt. %, respectively. As a refractory component, taken in a mass ratio of from 20 to 50 wt. % of the magnetic marking composition, it is most preferable to use the following oxides: ZrO 2 or Al 2 O 3 or solid solutions based on ZrO 2 -Al 2 O 3, with an Al 2 O 3 content of 5 to 20 wt.%, or Al 2 O 3 -MgO with an MgO content of 10 to 35 wt.%. The present invention is aimed at achieving a technical result consisting of creating a refractory marking composition for identifying explosives afte