FIELD: physics.
SUBSTANCE: marking additive in the form of spherical particles contains a magnetic component and a marking component with the following ratio, wt %: magnetic component 2-98; marking component 2-98. The magnetic component comprises, at least, one component selected from the group consisting of ferrimagnetic iron oxides and/or ferrites with a spinel or garnet structure or particles of metallic Ni. The marking component contains a mixture of salts in the form of nitrates, acetates, chlorides, formates, or oxides, including solid solutions based thereon. The marking component comprises, at least, two elements selected from the group consisting of alkaline earth elements, lanthanides, transition metals, and post-transition metals.
EFFECT: increasing the accuracy and reducing the analysis duration of objects containing a marking additive.
12 cl, 3 tbl, 4 ex
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