SU1759823A1 - Mustard color unfritted glaze - Google Patents

Abstract

Use: for glazing ceramic floor tiles in high-speed firing modes. The essence of the invention: the glaze contains, wt%, silicon oxide 44.66-48.65; alumina 8.42-12.02; iron oxide 1.30-2.47; calcium oxide 17.27-20.72; magnesium oxide 1.87-3.27; sodium oxide 4.99-5.34; potassium oxide 1.38-2.74; boron oxide 10.47-14.22; sulfuric anhydride 0.50-0.87. Characteristics of the glaze: firing temperature 950-1 SOW & C, TCLE (7.7-7.93) -10 6, gloss 17-25%. abrasion 0,013-0,018 g / cm. heat resistant 2 5 0 ° C; C, microhardness 946964 g / mm Glaze provides a crystalline coating. 3 tab.

Description

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The invention relates to ceramic production technology and can be used for glazing ceramic floor tiles in high-speed firing modes.

Known glaze, containing, wt.%: SI02 49,79-54,30; 11.71-13.60; ReaOz 1.62-2,05; CaO 18.69-22.40; MDO 0.25-0.28; 50z 0.03-0.05; NaaO 2.13-3.0; CgO 2.22-2.58; VAO 7.11-8.19 (firing interval 880-1100 ° C, CLTR-10 6 ° C 6.16-6.76, frost resistance 50 cycles).

The disadvantage of this glaze is the relatively low CTE value and the increased gloss value.

Also known glaze, containing, wt.%: SI02 56.8-57.2; 6.0-6.3; ReaOz 1.1-1.3; CaO 19.5-20; MDO 1.2-2.0; Na204.7-5.0; K20 1.0-1.4; B20z 7.9-8.1 (firing interval 980-1130 ° С, gloss 12-13%, КЛТР (8.22-8.40). Whiteness 45-49%, heat resistance 200 ° С, heat change-17: cost price 1 t - 180 rubles.).

The disadvantage of this glaze is relatively low heat resistance, low microhardness.

Closest to the proposed composition of the glaze is the composition of the glaze containing. wt.%: Si02 32.0-47.0; A1203 8.0-16.0; Re20z 1.0-1.5; CaO 17.0-29.0; MDO 0.1-2.0; N3202.0-7.0; “200.1-4.0, В20з6.0-11.0; Р20b 3.0-7.0 (firing interval 950-980 ° С, КТР (7.8-8.1). ° С).

The disadvantage of this glaze is the relatively low microhardness and heat resistance and increased abrasion.

The aim of the invention is to increase the microhardness, heat resistance. reduction of abrasion and obtaining crystalline glaze.

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The goal is achieved by the glaze comprising SI02. . Рв20з, CaO, MgO, Na20, “20. V20z, additionally contains 50z in the following ratio, wt.%:

SI0244,66-48,65

A 20z8.42-12.02

Re20s1,30-2,47

CaO17.27-20.72

MgO1.87-3.27

NaaO4,99-5,34

K201.38-2.74

VZOZ10,47-14,22

ZOZ0,50-0,87

The exclusion of P20b from the composition of the glaze and the additional introduction of 50z at the proposed ratio of components ensures the formation of a crystalline structure of a sallium-shaped nature composed of very thin crystals with a size of 1-2 μm located evenly throughout the volume, which in turn contributes to the improvement of the mechanical properties and thermal stability of the glaze. Thus, this composition of the components gives the glaze new properties, which makes it possible to conclude that the proposed solution meets the criterion of significant differences.

An analysis of the known ceramic glaze compositions showed that the components introduced into the solution (separately or taken together) are known, but none of these solutions achieve a nephritic mustard-colored crystalline glaze with high heat resistance, microhardness and low abrasion .

A comparative analysis with the prototype makes it possible to conclude that the claimed composition of the ceramic glaze differs from the known introduction by adding an additional 50h to the composition and the absence of PjOs, which suggests that the claimed composition meets the criterion of Novelty.

Volcanic ash, calcium borate, cullet, dolomite and refractory clay are used as raw materials. The chemical composition of the raw materials is given in table. one.

The glaze is prepared as follows.

The components of the mixture are weighed and subjected to wet grinding in a ball mill. Grinding is carried out to obtain a slip with a residue on the sieve 006 0.5-0.7%. The resulting slip is applied to ceramic tiles by sprinkling or spraying. Slip-coated ceramic products are fired in roller furnaces at high-speed firing conditions.

The chemical compositions of the glazes are listed in Table 2, and the physicomechanical properties in Table 3.

Compositions 1 and 3 are suggested, and 4 and 5 are outside the limits proposed.

The data presented in Table 3 make it possible to conclude that the proposed glaze formulations (1-3) allow one to obtain fritted mustard-colored crystalline glazes with increased heat resistance, microhardness and reduced abrasion.

The resulting glazes are well spread on the surface of the products, have a satisfactory degree of damping and good adhesion to the crock.

Compositions 4 and 5 do not satisfy the requirements of the glaze in quality and therefore cannot be offered.

Claims (1)

The economic effect from the application of the proposed glaze composition due to the use of non-deficient and cheap raw materials is 40 rubles. on 1 ton of glaze. Mustard-colored glaze, including SI02, A1.0z, Rv20z, CaO, fi-ioO, NaaO, KzO, BaOz, characterized in that, in order to increase microhardness and heat resistance, decrease abrasion and obtain a crystalline glaze, it additionally contains 80z in the following ratio, wt.%: S10244.66-48.65 AB8.8-12-12.02 Regos1.30-2.47 CaO17.27-20.72 MgO1.87-3.27 №204,99-5,34 KgO1,38-2,74 0 820з10,47-14,22 ZOZ0.50-0,87. Table 1 table 2