METHOD FOR OBTAINING A POLYCRYSTALLINE BISMUTH ORTHOGERMANATE Russian patent published in 2018 - IPC C30B7/10 C30B28/04 C30B30/00 C30B29/32 C09K11/66 C09K11/74 C01G17/00 C01G29/00 

FIELD: technological processes.

SUBSTANCE: invention relates to materials for scintillation technology, to effective high-speed scintillation detectors for gamma and alpha radiation in devices for express diagnostics in medicine, industry, space technology and nuclear physics. Method for producing polycrystalline bismuth orthogermanate with a submicron grain size, characterized by the presence of a single scintillation component with a flash time constant of no more than 50 ns, including mixing of reagents – an aqueous solution of bismuth nitrate Bi(NO₃)₃⋅5H₂O and germanium oxide GeO₂ – in the stoichiometric ratio Bi/Ge – 4:3, adding to the resulting suspension an aqueous solution of ammonia (1.7–8M) and subsequent hydrothermal-microwave treatment at a temperature of 140–220 °C for 0.5–2 hours in a Teflon autoclave with a volume 2–4 times the volume of the suspension.

EFFECT: invention makes it possible to synthesize a promising material for the creation of highly sensitive detectors with a high counting rate of events.

1 cl, 2 dwg, 5 ex