SU420584A1 - PHOTOCHROME GLASS - Google Patents

Description

one

The invention relates to compositions of photochromic glasses and can be used in the glass industry for recording information and as filters of variable transparency.

Known photochromic glass, including SiOz, VGOS, ALOS, NaaO, PbO, SIGO, C1, Br, F.

The purpose of the invention is to shift the boundary of the spectrum to 580 mm.

This is achieved by the fact that it contains the indicated components and components in the following quantities, weight. %:

Zyug55-60

VgOz16-18

ABOZ4-6

Na208,6-10

PbO0,1-4,0

CU200.07-0.13

Cl0.3-0.8

Br0,4-0,6

F0,4-0,6

0.1-4

0.3-0.5

0.5-10

Example. The proposed glass contains the following components, weight. %:

SiOa60; AgjO.37;

YngO10; CI0,3;

Br018; Br0.6;

AgaOs6; F0,4;

Pb3; Cu2O0.13;

CdO0,4; PgOb1,8

Glass. T at 1450-1500 ° C.

In order to isolate crystals of Ad PO4, the glass is subjected to iB wetting for 2-3 hours at 650-670 ° C.

The displacement of the boundary of the spectral sensitivity is associated with 1 extraction of Ag3PO4 crystals in the Glass along with AgCl and AgBr crystals, the spectral sensitivity limit of which in the long-wavelength part of the spectrum lies in the region of 540-750 mm.

The integral sensitivity of the glass remains high.

When glass is activated by the general light of the DKSSH-200 lamp, when the illumination on the sample is 80 tons of light it reaches a density of 1.2 in 30 seconds at an initial density of 0.08.

The table shows the comparative data on the change in the optical density of the glass, activated only by AgCl and AgBr crystals and glass, of the same composition, but with the addition of 1% PzOs. The measurements are carried out on a standard IFS-1 facility, which activates the radiation. filters. The activation time is 120 seconds.

Subject matter

Photochromic glass, including SiOj, VGOZ, ALOZ, Na2O, PbO, CuaO, Cl, Br, F, THAT, in order to shift the boundary of the spectrum of the sensitivity to 580 mm, it contains these components in the following amounts, wt. %:

65-60

Zyug

16-18

VgOz

4-6

Aoz

8.6-10 N820

0.1-4.0 PbO

0.07-0.13

CU2O

0.3-0.8

C1

0.4-0.6

Vg

0.4-0.6

F

and, besides

0, CdO

0.3-0.5 0Ag2O

0.5-10

Р205