METHOD FOR REPEATED USE OF A SOLUTION-MELT IN THE SYNTHESIS OF FeBO Russian patent published in 2022 - IPC C30B9/12 C30B29/10 

FIELD: single crystals production.

SUBSTANCE: invention relates to the field of obtaining highly perfect ⁵⁷FeBO₃single crystals. The method for repeated use of the melt solution in the synthesis of ⁵⁷FeBO₃ consists in the following: after the synthesis of ⁵⁷FeBO₃, the melt solution is drained, among the synthesized crystals, highly perfect ⁵⁷FeBO₃ single crystals with dimensions of more than 5 mm in diameter without visible surface defects and ⁵⁷FeBO₃ crystals with dimensions of less than 5 mm in diameter and with visible surface defects, then the solution-melt is reduced by dissolving defective ⁵⁷FeBO₃ crystals in it at temperatures up to 900°C and homogenizing by holding at 900°C for 20 h, lowering the temperature to 800°C for 15 min, holding for 3 h, heating to 900°C for 15 min, holding for 30 h, lowering the temperature to 800°C for 15 min, holding for 3 h, heating to 900°C for 15 min, holding for 40 h, then X-ray fluorescence analysis determines the concentration of iron W(⁵⁷Fe) and lead W(Pb) in the reduced solution-melt to calculate the state parameter of the solution-melt and with a parameter value of 0.05≤n≤0.1, the solution-melt is repeatedly used as suitable for the subsequent growth of ⁵⁷FeBO₃ crystals.

EFFECT: providing the possibility of multiple use of the melt solution drained during the synthesis of ⁵⁷FeBO₃ by the “flipping” method by restoring the initial content of crystal-forming components, reducing the cost of the technology and increasing the number of crystals obtained.

1 cl, 3 ex