METHOD OF PRODUCING LUMINOPHORE FOR HIGH-POWER INFRARED RADIATION VISUALIZERS Russian patent published in 2025 - IPC C09K11/78 C09K11/55 C04B35/53 C04B35/622 C04B35/64 

FIELD: chemistry.

SUBSTANCE: invention can be used in laser engineering. Luminophore for high-power infrared radiation visualizers is obtained in several steps. First, a nitrate solution containing 0.0155 mol of yttrium (III) nitrate is prepared; 0.0309 mol of magnesium (II) nitrate; 0.0007 mol of erbium (III) nitrate; 0.00014 mol of ytterbium (III) nitrate and 0.0545 mol of aminoacetic acid. Further, self-propagating high-temperature synthesis is carried out by successive combustion of the solution in quartz conical flasks using a vertical tube furnace at temperature of 600 °C. Obtained powders are calcined in a muffle furnace at temperature of 800 °C for 5 hours, compacted into a disc using a steel mould at pressure of 10 MPa, isolated with graphite paper and placed in a graphite mould, which is loaded into a furnace. Then intermediate exposure is carried out at temperature of 700 °C for 10 minutes and sintering in a vacuum of about 10 Pa at temperature of 1150 °C and heating rate 50 °C/min by passing through powder filling in graphite mould of sequences of DC pulses of 1.5 kA with pulse duration of 3.3 ms. After sintering, samples are cooled in off mode. To eliminate carbon impurities in the obtained ceramic samples, they are annealed in a muffle furnace at 1100 °C for 5 hours. Obtained luminophore has composition (Y_0.985Yb_0.01Er_0.005)₂O₃-MgO, detection range of 0.8–1.55 mcm and destruction threshold of 4.5 kW/cm².

EFFECT: disclosed is a method of producing a luminophore for high-power infrared radiation visualizers.

3 cl, 3 dwg