CHARGE FOR GROWING OF MONOCRYSTALS ON THE BASIS OF BARIUM HEXAFERRITE Russian patent published in 1994 - IPC

FIELD: electronics, crystallography. SUBSTANCE: -MFe₁₂O₁₉ where M - Ba, Sr, Ba-Sr which are used as high quality resonator in UHF-equipments with millimeter range. Charge for growing from solution in melt has the following composition, wt.-%: Fe₂O₃ 36.52-40.66; BaCO₃ 7.54-8.40; CaCO₃ 2.83-3.11; MnCO₃ 0.94-1.04; NaBiO₃ - the rest. Monocrystals Ba_0.88 Bi_0.05 Na_0.04 Ca_0.07 Mn_0.25 Fe_11.80 O₁₉ are prepared. Yield of ready spheres with magnetic high quality ΔH is ≅ 35 Oc Oersteds is 40-55%, and with deviation from roundness is ≅ 5 %, yield is 90-95%. EFFECT: accelerated process, increased yield of ready spheres for resonators due to decrease of anisotropy of mechanical properties in crystals. 2 tbl