SU1110764A1 - Red glaze - Google Patents

Abstract

RED GLAZE, including PbO, SiO, AEjOj, CaO, MgO, ZrOj, Fe, jOj, SrO or BaO, characterized in that, in order to reduce abrasion, it contains these components in the following (L

Description

I1110764

This invention relates to formulations.

glazes and can be used in the manufacture of ceramic products, including for glazing floor slabs, produced using modern high-speed firing modes for 8 slotted roller kilns.

Known composition 1 glaze colored color for coating ceramic products, containing, wt.%: PHO 72.41-75.47

Si02

13,10-18,71

5.83-6.00 0.01-0- 02

CaO 0.13-0.16

MgO0.14-0.17

CtjOg2,70-5,15

The disadvantage of this composition is the long duration of heat treatment (10.5-12 hours),

The closest to the proposed glaze is icing 21, containing May. %;

Pb72.74-81.36

SiOo

6.92-10.42

AR.OZ 1.76-2.05

CaO 0, 07-0., 08

MgO 0.02-0.03

0.02-0.04

ZrOy. 2.38-7.04

4.81-4.90

Fe, 0, 0.01-0.03

SrO 2.05-2.67 The disadvantage of this glaze is low abrasion resistance. The purpose of the invention is to reduce the heat capacity. This goal is achieved by the fact that the red glaze, including PbO, SiOj, CaO,% 0, ZrOj,, contain these components in the following amounts, wt.%:

In tab. 1 shows the composition of the glaze (May,%).

Table 1.

The components of the mixture are thoroughly crushed, mixed, and frittotut at 1300-350 ° C. After melting and granulation of the melt in running water, the Frit is supplemented by 99% ppm. The frits of 1% veselovskaya clay and (in excess of 100%) 0.5% carboxymethylcellulose and 0.02% sodium pyrophosphate (itlOHjO) in a wet state are washed away to the residue on the grid K 0063-0.08-0 15%. Glaze can also be used without pre-friting in a dry form. Only wet milling can be used. Melting of the charge, as well as firing should be carried out in an oxidizing or neutral environment. The glaze cover of the ceramic product is applied in a palivable manner and fired in electric furnaces with a temperature gradient of 0.5 h. Specific glaze compositions have the following properties (Table 2). The use of the proposed composition increases the service life of floor tiles.

11107644

Table 2

Sintering sintering temperature, C830 Firing interval, ° C Beginning940 End1010 Optimum firing temperature, C980 Size of crystalline formations, µ50-120 Thermal expansion coefficient, 6.10 820 815 550-710 920 910 860-886 1005 1000 960-990 970 955 890 -930 50-130 50-130 20-150 66.1-10 70.3-10 65.7-10 75.4-10

Claims (1)

class C 03 C 9/00, 1981 (prototype).  RED GLAZE, including rio, sio ₂ , le ₂ o ₃ , CaO, MgO ZrO ₂ , Cr ₂ 0 ₃ , Fe ₂ O ₃ , SrO or Bao, about t l and - repentant in that with the aim of reduce abrasion, it contains these components in the following quantities in May. %: Rio 55.63-56.65 Si0 ₂ 10.22-10.76 le o 0.55-0.59 Sub ³ 0.03-0.95 MgO 0.02-0.03 ZrO ₂ 19.98-21.09 Cr ₂ O ₃ 5.35-5.68 ' ^Fe 2 ° 3 0.02-0.03 SrO or BaO 4.22-8.20