SU1388394A1 - Mixture for producing ceramic tiles - Google Patents

Abstract

The invention relates to the manufacture of ceramic tiles used in the form of decorative elements of the interior, facing materials and t, To With the aim of increasing the mechanical strength of the molded tiles,. reducing the coefficient of linear thermal expansion while reducing the cost of the mixture contains the following components, wt.%: clay 5-10, chamotte 61-75, cullet 13-24 and dextrin 3-7. The physicomechanical indicators of the tiles are the following: the mechanical strength of the molded tiles is 11.2-13.1 kg / cm, the mechanical strength of the burned 2 tiles is 277-3Q5 kg / cm, the water absorption is 6.3 - 8.3, TKPR 6,1- 10 degree 1 tabl about c $ (L

Description

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The invention relates to ceramic industry, namely to the manufacture of decorative majolica tiles (inserts), which can be used both in combination with plain tiles for interior facing of rooms, as well as in the form of decorative elements of the interior or as an independent facing material.

The purpose of the invention is to increase the mechanical strength of the molded tiles, reducing the coefficient of linear thermal expansion with decreasing cost.

As the source of raw materials used brick battle, the battle of container glass, clay, marl. Use dextrin according to GOST 6034-79,

The mixture is prepared as follows.

The cullet is crushed to pass through sieve No. 0063, clay and chamotte - to a residue on sieve No. 0063 no more than 5-8%. The initial components are mixed in predetermined proportions with water. From the obtained slurry in bulk form, tiles of 150-150 mm are cast. . The relief on the surface of products is obtained by pouring into molds with a relief surface. The introduction of dextrin contributes to the fact that derived from

plaster molds ceramic shard - has a strength in the unfired form, sufficient for further operations without prior drying. The semi-finished product with a relief surface is glazed with a coating method of watering and decorated with the airbrush method -. Then the products are dried, for example, by the method of two-sided local blowing in the alternating mode in the temperature range 15–150 ° C for 30–50 min o and burned at 900 - EZO s.

Charge compositions of masses are given in

table, 1, and the physico-mechanical characteristics of the tiles - in table 2.

Claims (1)

Invention Formula The mixture for the manufacture of ceramic tiles, including clay, chamotte and broken glass, characterized in that, in order to increase the mechanical strength of the molded tiles, to reduce the linear thermal expansion coefficient with decreasing cost, it contains additional dextrin in the following ratio of components, wt,% : Clay5-10 Fireclay61 - 75 Cullet13 - 24 Dextrin 3-7 Clay Chamotte Cullet Dextrin Table 1 10 61 24 5 Mechanical strength of raw, kgf / cm Mechanical strength table2 13.1 11.2 12.2 8.2-9.8