PIGMENT FOR ABSORBING HEAT-STABILISING COATINGS

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FIELD : chemistry. SUBSTANCE : invention relates to production of pigments and coatings for passive methods of heat stabilisation of objects. Described is a method of producing a pigment for absorbing heat-stabilising coatings based on manganites of rare-earth elements, having phase transition in dependence of emissivity on temperature, a having general formula La(1-x) Srx MnO3, involving using mixture of powders La2O3, SrCO3 and MnCO3, mixing and heating to formation of solid solution with subsequent grinding, where heating is carried out in two successive steps : first for 2 hours at 800 °C, then for 2 hours at 1, 200 °C, wherein heat stabilising pigment has strontium concentration of 20 wt%. EFFECT : method of producing pigment with good heat stabilising properties and increased variation range of emissivity in region of phase transition. 1 cl, 1 tbl