METHOD OF MAKING LITHIUM-ZINC-MANGANESE FERRITE CERAMICS Russian patent published in 2024 - IPC H01F1/10 B22F3/12 C04B35/26 C01G49/00 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to a method of producing lithium-zinc-manganese ferrite ceramics. Can be used for production of microwave devices, non-resonator controlled devices of low power, ferrite switches and phase shifters and other soft magnetic products. Solution containing 0.015 mol/l of lithium nitrate LiNO₃, 0.05 mol/l of iron nitrate Fe(NO₃)₃, 0.005 mol/l of manganese nitrate Mn(NO₃)₂, 0.018 mol/l of zinc nitrate Zn(NO₃)₂ and 0.025 mol/l of aminoacetic acid C₂H₅NO₂ is brought to the point of self-ignition and synthesis is carried out with obtaining powder in the form of granules. Obtained powder is thermally treated at temperature of 800 °C for 2 hours. Then mechanochemical grinding is carried out for 4–8 hours with addition of 5–10 wt.% of polyethylene glycol and 0.5–2.0 wt.% of bismuth oxide, pressing at pressure of 1.5 t/cm² and sintering in a muffle furnace at temperature of 950–1,050 °C for 8–16 hours.

EFFECT: uniform grain size distribution and improved magnetic and electromagnetic characteristics.

1 cl, 2 ex