METHOD FOR PRODUCING LUMINESCENT BISMUTH-CONTAINING QUARTZOID MATERIAL BASED ON HIGH SILICA POROUS GLASS

摘要

1. A method for producing bismuth-containing quartzoid glass based on high-silica porous glass obtained by heat treatment of sodium borosilicate glass, holding two-phase glass in a 3 M HNO solution during boiling, multi-stage washing in distilled water and combined drying in air at a temperature of 20 ÷ 120 ° C, characterized in that a 0.5 M solution of Bi (NO) bismuth nitrate prepared on the basis of an aqueous 2 M solution is introduced into the pore space of the NPS matrices three times for 24 hours at a temperature of (22 ± 2) ° C HNO, between impregnations and at the end, samples are dried at 30-65 ° C for 40-60 minutes, then the obtained impregnated and dried samples are heat-treated in an air atmosphere in an electric furnace, and the samples are placed on a substrate of high-purity quartz glass and carry out heating for 5 min using an oxygen-hydrogen burner, which is fed from the side of the quartz substrate. 2. The method according to claim 1, characterized in that the samples are impregnated in 0.01-0.05 M Bi (NO) solutions prepared on the basis of a 2 M HNO solution; 3. The method according to claim 1, characterized in that the heat treatment is carried out at temperatures from room temperature to ~ 900 ° C with a heating rate of 1-4 deg / min, and then at temperatures ≥1500 ° C; 4. The method according to claim 1, characterized in that the heat treatment is carried out according to a multi-stage temperature-time regime from room temperature to ≥1500 ° C, while in the first stage, the heat treatment is carried out from room temperature (18 ± 2 ° C) to 115 ± 2 ° C with a heating rate of 3-4 deg / min and a shutter speed of 30 min; in the second stage, heat treatment is carried out from 115 ± 2 ° C ° C to 420 ± 2 ° C with a heating speed of 1-2 grad / min and a shutter speed of 60 min, in the third stage, heat treatment is carried out from 420 ± 2 ° C to 565 ± 2 ° C with