GLASS FOR ACTIVE PART OF IONIZING RADIATION SOURCES BASED ON CESIUM-137 AND METHOD OF FORMING ACTIVE PART OF RADIATION SOURCES Russian patent published in 2021 - IPC G21G4/00 

FIELD: glass manufacture.

SUBSTANCE: invention relates to the manufacture of glass for the active part of ionizing radiation sources based on cesium-137. Cesium-borosilicate glasses are proposed as a material for the active part of ionizing radiation based on cesium-137, which, in addition to the main components (oxides of cesium, boron and silicon), contain such additional components as oxides of titanium, calcium, lithium, zinc in concentrations, wt%: Cs₂O 40-48 ; SiO₂ 39-40; В₂О₃ 6-10; TiO₂ 0.5-5.0; CaO 0.5-1.5; Li₂O 2-3; ZnO 0.5-2. The method for forming active parts of radiation sources includes mixing a dry salt of cesium-137 nitrate and a mixture of fluxing components, followed by heating the resulting mixture to a glass melting temperature of 1100 - 50°C at a rate of no more than 10°/min. with exposure of the molten glass melt for 1-2 hours. The finished glass is crushed and poured into graphite molds. The molds with glass are heated to a temperature of 1100±50°C, forming the active part, then they are cooled and transferred to the assembly of the radiation source.

EFFECT: creation of glass with high chemical resistance, the ability to be molded in graphite matrices at a relatively low melting temperature (1100±50°C).

2 cl, 5 tbl