SU823324A1 - Photoengineering glass - Google Patents

Description

The invention relates to the composition of alumino-borosilicate glasses, used mainly for the manufacture of heat-resistant lighting products. Known glass 1 the following chemical composition, wt.%: CaO NaaOa). CoO ni o Tio,. However, glass has a low translucency, with a total light transmission of about 80%, which crystallizes when it is mined. Due to its low CTE, it is not suitable for mechanized production on an air force machine. The closest to the proposed is lighting glass 2 of the following composition, weight.%: SiO / L73-75, 05 - 1.0 CaO5.0 - 6.0 MqO-1.0 - 1.5 BaO 0.5-3 NaftO. 12.5 - 14 .1.0-2.5 Se0.001 - 0.008, 0001-0,0002 SbO.0.05 - 0.1 However, glass is characterized by low light transmission with an average value of -83.6.%. In addition, it has a low heat resistance that. significantly limits the range of lighting products manufactured from this glass. The purpose of the invention is to increase the thermal stability and translucency of glass. The goal is achieved by the fact that glass containing SiO, AljO CaO, MqO,, K-aO. .on additionally contains, NavjOg, CEOjfHPH the following ratio of components, wt.% :.

tJna.Oj0 005 - b, 1

 0.002 - 0.2

: MaOz

0,0004- 0,0014- 0,25

: Th4

C & OVA, 005 - 0.25

/ Introduction to glass containing SiOj, CaO and MqO, B. The specified quantities and ratios increase the heat resistance of lighting products to. In addition, the chemical resistance of the glass to a humid atmosphere and liquid means is increased, as the content of alkaline oxides in the surface layer of the glass decreases. The presence of B / jO in the glass composition increases / the refractive index, as the ratio of Na O / BOSO more than 3 has a positive effect on the overall light of the translucency. The content, in the composition of aluminum oxide glass, is 1.2–3.5 wt.% In the presence, causes a tendency to decrease the crystallization capacity of the glass, but decreases the heat resistance of the products without causing an increase in viscosity at low temperatures.

The presence of Mn in the glass composition increases the transparency of glass, as it interacts with iron oxides contained in raw materials, converts ferrous iron to oxide. Introduction to. composition of Mp2 glass. This ratio of CaO MqO reduces the crystallization capacity of glass and increases its heat resistance, since it contributes, in addition, to an increase in the heat transfer of the lighting product, due to an increase in translucency.

Introduction to the composition of glass oxides of rare-earth elements, in the specified ratio, increases the glass conductivity of glass, increases its thermal and chemical stability.

The introduction of CeoD and in combination with significantly increases the steerability of the stela, as the pro-tritis is simultaneously both whitish and physical bleaching.

The presence in the proposed composition of the glass Ce Oa, Nd.0; j,,. Pr, jO increases the transparency of the glass, since in addition to discoloration, the light transmission in the red and blue regions of the visible part of the world increases. The glass mesh is modified, and the Pr-jOg increases the thermal and chemical resistance of the glass.

The raw materials for glass are scaffold, alumina, chalk, water, potash, boric acid, pyrolusite, polyrite.

The table shows the compositions of the proposed and famous glass.

Table 2 shows the physico-chemical properties of cocTaiBOB.

The introduction of rare-earth oxides into the composition is carried out by introducing waste from their production, which significantly increases the economic efficiency of the production of lighting glass. Diffuser FR-152, made from the proposed glass of experimental cooking of Cherni glass factory, have thermal resistance, total light transmission 88%. FG-152 diffusers made on the same z-Avode from known glass have a heat resistance not

above 83

With a total light transmission of 83.6%.

Table

Table 2

Heat resistance of the diffuser FG-152 ° C 110 110 110 110 Light transmission h 1.2 mm Chemical NNaOHXY-I XY-I XY-I XY-I resistance

The temperature of the upper limit of crystallization

Temperature, it is optional

contains BaO, MT {1.0z,

MadOz, SeOd. at following Ё16m the ratio of these components, wt.%:

 SiOa73.0 75.5

, 2 - 3,5

CaO6,5 - 8,0

MqO1.5 - 4.0 88 8.5 88.3

14.0 2.5 2.5 0.1 0.2 0.2 0.25

5 CeOj0.005 - 0.25

Sources of information / taken into account in the examination

1. Authors certificate of the USSR 554221, cl. From 03 To 3/10, 1974.

0

2. Authors certificate of the USSR .555062, cl. C 03 C 3/10, 1976. 110 88.6 XY-I

Claims (1)

Claim 30 Lighting glass, including S Ϊ 0 _{a t} A1 ₂ 0 ₃ , C a 0, And q 0, N 0 ₃ , K l0, characterized in that, in order to increase thermal stability and translucency, it additionally contains 35 Ba0 ₃ , MpaRz, La ^ Oq, Pr _a Oz, NadOz, CeOd. in the following ratio of these components, wt.%: Na ^ O 11.5 - 14.0 K ₂ 0 0.5 - 2,5 ^B 2 ° 3 0.05 - 2,5 MP2O3 '0.005 - 0.1 La _a 0 ₃ 0.002 - 0.2 Pr ^ Og 0,0004 - 0.2 Nd _a 0 ₃ 0.0014 - 0. 25 Ce 0.005 - 0.25