SU408921A1 - COLORED EYE - Google Patents

Description

one

The invention relates to colored glaze compositions and can be used in the ceramics industry to coat black and brown.

Color glaze is known, including SiOz, AlsOa,, FeO, TiOj, MnOs, CaO, MgO, NagO.

The purpose of the invention is to obtain a black or brown coating and a reduction in the firing temperature.

For this, the glaze additionally contains F and S in the following ratio of components, wt.%:

SiO225-50

A12Oz3-7

RegOz + ReO5-30

TiOa0.1 - 1

MpO20,1-25

CaO0,1-1

MgO0,1-1

NajO8-20

Р8-20

S0,1-2,5

To obtain a black glaze coating, the components of the mixture of the proposed glaze are used, weight. %: sodium silicofluoride 30-60, clay 10-20, iron oxide or iron-containing slag (or ore) when recalculated to Fe2Oz 10-30.

To obtain a brown glaze coating, the blend components of the proposed glaze are used, wt.%: Sodium silicofluoride 30-60, clay 10-20, ferric oxide or

iron-containing slags (or ores) when recalculating to Fe2Oz 5-15; manganese dioxide or pyrolusite (or other manganese-containing compounds) 5-25.

The glaze mixture of this composition is prepared without prior fritting, i.e., it is directly ground in a ball mill by wet grinding to a residue on sieve No. 0056 10,000 sp./cm from 0.05 to 0.10%. Glaze slurry applied wet

method of glazing on the surface of ceramic products with a layer thickness of 0.5-1.0 mm. Firing products are carried out in muffle or electric tunnel kilns at 950-1050 ° C.

The offered glaze is suitable for the manufacture of glazed ceramic products according to the technology of glazed ceramic products according to the technology of high-speed firing with a firing cycle duration of 40-

45 min.

The proposed icing has the following characteristics.

Sintering temperature

glazes, ° С700-800

Temperature, corresponding to 860-950 shine, ° C Firing interval: start, ° C

930-960 the end, ° C 1030-1070

Duration about 0, 7-8 gigues, hour

Coefficient of thermal linear races (70-80). 10-7 shrub, ° c. Example 1. To obtain black glaze, take raw materials, weight. %: sodium silicofluoride 50, pyrite cinder 40, clay Veselovska 10.

Chemical composition after fusing, weight. %: SiOz 28.2; ABOZ 4.24; ResO4 26.65; TYu2 0.23; CaO 0.49; MgO 0.22; NagO 18.09; S 2.36; F 19.52.

Example 2. Raw materials are taken to obtain brown glaze, wt.%: Sodium silicofluoride 50, pyrite cinders 20, pyrolusite 20, Veselkovsk clay 10.

The chemical composition of the brown glaze after fusing, wt.%: SiO2 25.93; 3.78; ResO 13.03; TiOj 0.14; CaO 0.3; MgO 0.08; NaaO 16.81; MnO2, 21.23; S 1.61; F 17.09.

Subject invention

Colored glaze, including SiOa,, FeaOs, FeO, TiOg, MnOg, CaO, MgO, characterized in that, in order to obtain a black or brown coating and reduce the firing temperature, it additionally contains F and S in the following ratio of components, weight.%:

SiOa25-50

ABOS3-7

FeaOa + FeO5-30

TiOa0.1 - 1

MpOz0,1-25

CaO0,1-1

MgO0,1-1

NasO8-20

F8-20

S0,1-2,5