PIGMENT FOR ABSORBING HEAT-STABILISING COATINGS Russian patent published in 2017 - IPC C01G45/12 C01F17/00 

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) Sr_x 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.

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