METHOD OF OBTAINING CuMn GaBO OXYBORATES Russian patent published in 2018 - IPC C30B9/04 C30B9/12 C30B29/22 

FIELD: chemistry; technological processes.

SUBSTANCE: invention relates to the technology for producing novel magnetic materials – oxyborates Cu₂Mn³⁺_1-xGa_xBO₅ (0≤x<1), which include ions of transition metals, which can be used in the chemical industry, development of magnetic information technology, design of magnetic sensors. Method of producing oxyborates Cu₂Mn³⁺_1-xGa_xBO₅ (0≤x<1) from a solution-melt involves sequential fusion of oxides taken in a stoichiometric ratio, further homogenisation with heating followed by cooling and growth of crystals under slow cooling, wherein during fusion the crystal-forming oxides dissolve in the melt of a mixture of bismuth trimolybdate Bi₂Mo₃O₁₂ and borax Na₂B₄O₇, taken in molar ratio (0.7–1):1 in the following sequence: Na₂B₄O₇-Bi₂Mo₃O₁₂-B₂O₃-Mn₂O₃-Ga₂O₃-CuO, homogenisation is carried out at a temperature of 1,000–1,050 °C for 2 hours, subsequent cooling is carried out at a rate of 100–120 °C/hour to a temperature which is 5–7 °C below the metastability boundary, and slow cooling during growth is carried out for 5–7 days.

EFFECT: technical result of the invention is the production of single crystals Cu₂Mn³⁺_1-xGa_xBO₅ (0≤x<1) with a spin moment S=2, having a higher total magnetic moment and a magnetic ordering temperature, which expands the possibilities of their application, including in the space industry.

1 cl, 2 dwg, 3 ex