SU481556A1 - Glass - Google Patents

Description

one

The invention relates to glass compositions used for the production of microbeads, which are used to study the behavior of NINs and to indicate solid aerosols (dust) in various industrial and technical processes.

Known glass, including R OS,

Si Oh,

and MQO.

2 v

In the production of microspheres, the known glass composition is not suitable for indicating dust contaminants, since, in addition to phosphorus, which produces an isotope during irradiation, it includes elements that generate their own long-lived isotopes, when irradiated with neutrons. Thus, the period of the decay of Ztv is 245 days, 164 days, Bal4U 3 days,

moreover, the isotopes 2fl and Ba, besides j3 radiation, have V radiation.

The purpose of the invention is to ensure the formation of a radioactive isotope of phosphorus with radiation and a half-life of 14.22 days upon irradiation of glass with neutrons.

Lee

This is achieved by the fact that the glass contains these components in the following amounts, wt.%:

69-8О 10-21 10-20

In tab. 1 shows a quantitative

the composition of the components of the proposed glass, wt.%:

Contained in glass

  ABOUT

the amount of 6O-8O wt.% is necessary and sufficient for the formation of the acioactive isotope of phosphorus P with a half-life of 14.22 days and the luminescence of microballs necessary to indicate dust contamination.

Introduction to the composition of MflO in the amount of 10-2O wt.% And Si O from 1O to

I21 wt.% Ensures its manufacturability 1 and does not create long-lived isotopes with V radiation when irradiated with a neutron flux. The proposed glass composition is techno-gnchen; its cooking temperature is 13OO-132 ° C. From glass powder with its thermal imaging in the environment of alumina in an electric furnace; The particle size of which does not exceed 20 microns. The mixture obtained is burned in a muffle electric furnace at 800-1100 ° C with a tholod of 10 mm for 25-30 minutes, at which this glass particles are fused, turn into microspheres, which after cooling. Table 1. not exceeding, get microsharikn. are ground before passing through the cis then with openings of 40 microns. Particles of glass size micron. mixed with powdered alumina Yni 1 is mixed into an aqueous solution and ode, alumina. Next, the microspheres of the oblu, the reactor by a stream of slow neutrons, - rons, as a result of which the radioactive isotope of phosphorus P is caused - with radiation, the half-life is 14.22 days.

I Ammonium monobasic phosphate can be used as raw materials; -silicic acid is anhydrous and magnesium carbonate.

In tab. 2 shows the properties of the proposed glass.

Powder / dust / from calibrated glass radioactive beads is intended for use in studies of the behavior of solid aerosols: the adhesion of powders and dust, their retention by filters, the migration of dust aerosols, etc. under experimental and production conditions.

The detection and quantification of dust contamination by radioactive indication provides high sensitivity, which is not achieved when using other methods of indication and

measurements.

Subject invention

Glass including. Si Oh

MgO.

i b2

characterized in that, in order to ensure the formation of a radioactive isotope of phosphorus with AND radiation and a half-life of 14.22 days when the glass is irradiated with neutrons, the onog contains these components in the following amounts: %:

69-80

10-21

10-20