CRYSTALLINE SCINTILLATION MATERIAL BASED ON BARIUM FLUORIDE AND METHOD OF OBTAINING THEREOF Russian patent published in 2014 - IPC C04B35/553 B82B3/00 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to field of scintillation equipment, to effective fast-operating scintillation detectors, intended for registration of gamma-radiation, in devices for fast diagnostics in medicine, industry, space technology, scientific research and high-tech. Crystalline scintillation material based on barium fluoride has ceramics structure in form of system of grains with layer structure, which contains dislocations, with thickness of layers less than 100 nm, in which layers of grains throughout the volume are saturated with defects, formed by dislocations of linear type. Method of obtaining said material includes hot pressing of highly pure initial powder-like BaF with content of cationic admixtures 1 ppm. Hot pressing is carried out in conditions of gradient-free field of temperatures by means of heater of greater height with comparison to height of sample and with provision of homogeneous field of mechanical tensions on the plane of pressing, after which annealing of obtained ceramic plates is performed in active fluorinating gas medium at temperature which does not exceed T_m BaF₂.

EFFECT: obtaining ceramic material with high coefficient of transmission, not less than 0,8 in the range of spectrum 0,22-9 mcm, higher intensity of fast component and with time of highlighting τ₁=0,8 ns with maximum at wavelength 220 nm.

2 cl, 3 ex, 1 dwg