SU1096242A1 - Glass - Google Patents

Abstract

GLASS, including SiO, j, AljOj, CejOj, EujOj. It is distinguished by the fact that, in order to reduce the cooking temperature, it additionally contains MgF-, AlFj, MgO and TbjOj in the following ratio of components,%: 69-72 SiOj 12- 15, 1.0-3.0 CejO, 0.2-0.4 Eu jOj 0.5-1.0 MgF, 0.5-1.0 AlFj 10-13 MgO 0.5-2.0 ty- goz

Description

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CD O5 ND

ND The invention relates to a glass composition intended for use in scintillation radiometric devices, in electron microscopy and in the creation of radiolums of non-centered light sources, cathodoluminescent screens. Known scintillating glass, comprising, wt.%: SiOj 61-73 96; 9.42-ll; 0; 4-12,58; MgO 0-22; SVZOz 3-4,04. Light outputs relative to the reference NaJ single crystal (Tl) when exposed to γ radiation 8-14% of NaJ (Tl) 210. Cooking temperature G1. The disadvantages of this glass are a tendency to crystallization and relatively low chemical resistance: weight loss during boiling in distilled water is 4.5-6.5 mg / 1000 cm. The closest to the proposed and the achieved result is luminescent quartz. glass, including, wt.%: Si02 94-99,25; , 0.5-2.0; CeO2 0.05-2.0; ShejOj Oh, 05-2, 0. The light output of this glass relative to the known SCS glass at cathode luminescence of .3.5-7.0 relative units, with radio luminescence (under the influence of tritium radiation) 1-1.5 rel. -D f22. However, this glass is characterized by a high cooking temperature of 1950-1850 ° C. The purpose of the invention is to reduce the cooking temperature. The goal is achieved by the fact that glass / including SiOj, A120, Ce20j, EujOj, additionally contains MgFj, AlFj, MgO, Tb20z in the following ratio of components, wt.%: SiOj 69-72; MDO 12-15; O 3,0 SujOj 0,2-0,4; MgFj 0.5-1.0; AlFj 0.5-1.0; MgO 10-13; 0.5-., 0. Specific compositions of glasses are given in Table. 1. Table 1 Content of components in the components of the compositions Continuation of the table-l. 1 Average duration of the fast component of the light flash, NS (with X-ray pulsed excitation) Chemical mass stability during boiling in distilled water, kg / 100 cm2 6.5 Time during which crystallization occurs by volume, during heat treatment, h 2.0 Cooking temperature ° C

The temperature of the synthesis of glasses 15001550 C.

The glasses are brewed as follows.

The mixture is made up of reagents of the brand och, chemically pure, and ch.d.a. Additionally, 10% charcoal is added in excess of 10%. Glass melting is carried out in kvar. fine crucibles with a capacity of 3 liters at 1500ISSO C for 5-8 hours. The reducing nature of the atmosphere is maintained in the furnace due to incomplete combustion of the fuel. Tubes are pulled out with a 2–10 mm diameter ticket and molded from solid blanks. Measurements of scintillation energy are carried out relative to a reference KU (T) single crystal, and for a -excitation (Cm) under a Cr / V90 excitation. The light output of the radioluminescence K.tf (Tl) is 20%, measured by the actinometric method.

Offered glasses are characterized by high scintillation. efficiency, low crystallization capacity, high chemical resistance, which makes it possible to produce capillaries and billets of considerable dimensions for ionizing radiation detectors.

Claims (1)

GLASS, including SiO ₂ , AljOj, Ce ₂ 0 ^, EujOj, characterized in that, in order to reduce the cooking temperature, it additionally contains MgF ₂ , A1F ₃ , MgO and Tb ₂ O ₃ in the following ratio of components, May.%: S i 0 ₂ 69-72 A1 ₂ o ₃ 12-15 Ce ^ Oj 1.0-3.0 Eu, 0. 0.2-0.4 MgF./ 0.5-1.0 Alfj 0.5-1.0 MgO 10-13 Tb. ₂ O ₃ 0.5-2.0