SU1414813A1 - Glaze - Google Patents

Abstract

The invention relates to the technology of silicates and can be used in the manufacture of ceramic glazed tiles. The aim of the invention is to reduce the duration of firing, the increase in gloss and the reduction in the coefficient of thermal expansion. For this icing contains, Mac.% J: -. SiO 36-38; 8203 19.5-20.5; CaO „. 4.5-5.5} BaO 5-6; ZnO 5.5-7.5; I ZrOi. 9-12; Na-jO 0.5-1.85; К204.15-5.5Г 8.5-9.5. The firing time of the glaze is 27 minutes, the brightness is 78-80Z, the coefficient of thermal expansion (5.0-5.1) -10-degrees. 2 tab.

Description

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The invention relates to the technology of silicates and can be used in the manufacture of ceramic glazed tiles, mainly for the internal lining of the walls of buildings,

The purpose of the invention is to reduce the duration of firing, increase gloss and reduce the coefficient of thermal expansion.

Specific compositions of the glaze are given in table. TO

The proposed formulations have physico-chemical properties, which are presented in table. 2

In order to obtain the glaze, use is made of raw materials, raw materials, wt.%:

Sand15,5-17,2

Zircon

concentrate

Zinc oxide

Borna acid

Kaolin

a piece of chalk

Soda cala si-nirovanna

Potash

Carbonic

barium

Prepare the icing as follows.

In accordance with the raw material composition, the materials are fi xed and the frit is boiled at a temperature of 3.5–4 hours (a temperature rise of 2.5–3 hours, 1 hour of aging). The finished granulated frit is loaded into ball mills.

10.5-12.9

3.9-5.8

26.6-28.1

16.9-19.0

6.7-8.2

0.7-2.0 5.9-7.2

5.0-6.0

0

five

0

five

for grinding to the residue on the sieve 0056 0.1-0.2%. Kaolin, KOD (carboxymethylcellulose) clay and sodium tripolyphosphate are introduced as a mill additive. The density of the working glaze slip is 1.54-1.62 g / cm.

Glaze is applied to the product by watering or spraying. The glaze consumption per tile is 18-20 g. The products are roasted at 850 ° C for 27 minutes. The temperature of the beginning of softening of the glaze is 700 ° C, and the end is 750-770 ° C.

Claims (1)

Invention Formula Glaze5 including SiO, CaO, 1BaO, ZnO, ZrO,, KjO, AljOj, characterized in that, in order to shorten the firing time, increase the brightness and reduce the thermal expansion coefficient of the skin, it contains these components in -. blowing amounts, wt.%: Q five Sio Cao WAO Zno ZrOa . 36-38 19.5-20.5 4.5-5.5 5-6 5.5-7.5 9-12 0.5-1, S5 4.15-5.5 8.5-9.5 Table 1 Sio 36.0 37.0 37.0 38.0 38.0 405 Cao Bao 20.5 20.0 ZnO ZrOji 20 „0 20.5 19.5 table 2