SU1395597A1 - Method of producing light-dispersed articles - Google Patents

Abstract

The invention relates to glass industry and can be used to produce light diffusing products. The aim of the invention is to increase the heat resistance. For this, in the method of obtaining light scattering of dry products by matting with fluorine-containing compounds, before the matting, ion-exchange treatment of the product is carried out in a potassium nitrate melt at a temperature of 100-150 ° C below the glass transition temperature to create a compressive stress of 60-160 deep μm, and matting lead to a depth of a compressed product layer of at least 50 μm. The heat resistance of the products is 220-350 C. Table 2.

Description

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The invention relates to glass industry and can be used to produce frosted light scattering and: objects with high thermal stability.

The purpose of the invention is to increase the heat resistance.

Example 1. The light filtering caps (products) made of KJpacHoro glass composition, SiO 6J4,8; BjOjAjO; ZnO 13j K, 0 4.0;

W, 5; CdSOj 1.6; SB 0.6; S 0.5, are subjected to ion-exchange treatment in KNOj races. The glass transition temperature with {flowed at 590 ° C, thus, the temperature | treatment interval was 440-490 ° C.

Ion exchange treated products s: then it is subjected to chemical matting; it is contained in a solution containing. wt%: HJF (40% -na) 16; - HaG 35; NH4F J5; 14. Chemical matting is carried out before removing the glass layer with a thickness of 5-50 microns. The resulting light scattering products are subjected to spectral and thermal testing.

Coordinates of chromaticity (x, y), integral light transmission (T,%),

Determined on the calorimeter and spectroscopic 30 of the heat resistance, in front of the SF-14 mafotometer.

Heat resistance is determined by heating products in an air thermostat at a given temperature and dropping them into water at a temperature of 20 ° C. The heating temperature is increased with psag 5 C until the products are destroyed, and

35

An ion exchange treatment of the product in the melt of potassium nitrate at a temperature of 100-150 ° C below the glass transition temperature before creating compressive stresses with a depth of 60-160 µm is carried out by tirovaniye, and matting is carried out to a depth of not less than 50 µm.

then calculate the heat resistance according to the formula

0 T „- T

in 1

where T „is the heating temperature;

Tj is the cooling temperature. Properties of light-scattering products are presented in table. one.

Example 2. Light-scattering caps of lunar-white glass composition, wt.%: SiOj 72; one; eight; MgO 2; BaO 5; K ,, 0 4; 8, processed in the KNOj melt, the glass transition temperature of the glass is 600 ° C, in a similar manner, the processing interval is 450-500 ° C. The following operation is analogous to example 1,

The properties of the products are presented in Table 2.

Claims (1)

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