SU607806A1 - Glaze - Google Patents

Description

(54) GLAZE

one

The invention relates to the field of silicate technology and is intended for use in the building materials industry as a colored glaze for facade ceramics. Transparent glazes are used in the preparation of color glazes in order to expand the color range of the tiles.

Known low-melting pointless glaze for household ceramics, having the following composition of ingredients, wt.%: Si0245.0; Ae20, 10.0 V.0, 34.0; CaO 6.0; NctjO 5.0. This composition of the glaze contains a large amount of deficient and expensive B; Oj. A reduction in the composition of even a small amount of enterprise scale will give a significant economic effect.

The closest in technical essence and the achieved result to

2

The invention is suppressed with a glaze of the following composition, wt.%: & i 40-55; ZrOj 8-18; BGO, 15-JO; LesOe 2-4; NOjO 4-7; CaO 1-3; Y-0 0, 9; WAOO, 1-9, at least one oxide from the group, U-i, 20 ,, CuO, Co2

W03, Mo03

0.1-2.

The purpose of the invention is to ensure the transparency of the glaze.

For this, the known glaze contains SiO ,, Zr0.j, BjOj, Na.jO, MgfO. SrO in the following amounts, wt.%: Si O - 39,7

68.2

2gO, 9, 5 0.3

43.7

B;, OG 15.9 1.2 Na O 0, 3 3.3

md0, 3

12.5

SfO 4,6 The following are specific examples of glaze.

Tabchiaa Compositions are transparent, have good spreading and clutch with a black, do not give a tska, hair cracks. In tab. 2 shows the main physicochemical and thermal properties of the developed compositions. Table 2 Physical and chemical properties indicators Cooking temperature, C 1300-1350

Deposit temperature, C

940-960

Coefficient of thermal expansion, Sz1 10 degrees

48-55

Chemical resistance 1 hydrolytic class

Heat resistance

190-240

Transparent colored glaze will be used in the design of interiors of public buildings.

Claims (1)

Invention Formula Glaze, including NQjO, Mg-0, y, and with the fact that, 4eHrfk transparency, zannyh components in honor, weight. %: SiOj 39.7 GGOD 0.3 ,9 N «2о 0,3 Mg- О 0,3 SrO 4,6 On the basis of transparent glaze, it is possible to develop crystalline aventurine glazes for decorative decoration of the interior and exterior of buildings. The proposed glaze can be successfully used for the manufacture of household ceramics in enterprises of the local industry, since it has a low coefficient of thermal expansion, has an acceptable melting point and, importantly, does not contain lead and other toxic components.