DOUBLE SCANDIUM AMMONIUM SULFATE DOPED WITH EUROPIUM AND METHOD FOR ITS PRODUCTION Russian patent published in 2022 - IPC C01F17/282 C01F17/10 C09K11/56 C09K11/78 

FIELD: chemical compounds production.

SUBSTANCE: invention relates to a technology for producing a chemical compound of the composition (NH₄)₃Sc_0,995Eu_0,005(S0₄)₃, which can be used as a phosphor for non-contact temperature determination. Europium doped scandium ammonium double sulfate (NH₄)₃Sc_0,095Eu_0,005(SO₄)₃ is proposed. The method for obtaining double scandium and ammonium sulfate doped with europium, composition (NH₄)₃Sc_0,095Eu_0,005(SO₄)₃ includes obtaining a mixture of an aqueous 1.7 wt.% solution of scandium sulfate and an aqueous 0.2 wt.% solution of europium sulfate, heating mixtures to 70-80°C, adding an aqueous 75 wt.% solution of ammonium sulfate, preheated to 70-80°C, while the initial components are taken in a ratio (mol.) equal to NH₄⁺:Sc³⁺:Eu³⁺=220:2, 5:0.15, stirring and cooling to room temperature in a natural way, filtering, washing the precipitate with ethyl alcohol and drying at a temperature of 40-50°C for 4-6 hours. The obtained compound of the composition (NH₄)₃Sc_0,995Eu_0,005(S0₄)₃ has sufficiently high sensitivity values in the operating temperature range.

EFFECT: compound can be obtained in a simple way using liquid-phase synthesis, excluding the use of high temperatures.

2 cl, 4 dwg, 2 ex