SU1004317A1 - Ceramic blue pigment - Google Patents

Description

The invention relates to compositions of ceramic pigments used for applying overglaze paints or for dyeing white deaf covers of ceramic products in blue. ..

Known ceramic pigment blue-green color Cll, comprising the following components, wt.%:. Sf0263 - 72,

A120e11-14

Re20e0,4-0,6

CaO0,3-0,5

MDO0,2-0,3

KjO2-2,6

N3.04-4,8

Co „0, ZW

Cr Oz8-12

Closest to the invention is a blue ceramic pigment 2, comprising the following components, wt%:

Si 02 52.8-60.9 AG OZ11.7-13.0

 - 0,5

0.6

CaO0.5 0.6

MDO -0.3

1.8 - 2.2

2.0 - 2.3 N320

20, -0-30,0

SoaOz

The disadvantages of the known blue ceramic pigments are the narrow firing range (800 lpOO ° C) and the relatively high sintering temperature (1270-1300 ° C).

The aim of the invention is to extend the firing range and reduce the sintering temperature of the pigment.

This goal is achieved by

To ensure that the ceramic pigment of the blue two gga inclusions S 10, A12%,, MDO, ConOj, and NajO additionally contains ZnO at the following ratio of components f% by weight

15

SlOo43,12-49,09

AlflO 9D7 - 10.46

Igoa

OHi

0.35 FejOg 0.43

0.49

Cao

0.34

0.31

MgO

20 1.8

3.5

Conoi

1.66 1.58

1.75 1.54

40.0 34.0

Zno

For the manufacture of pigments are used, (May.%): Perlite, for example

Aragats field, 56.5-64.2; cobalt ohHCb 1.8-3, zinc oxide 34-40.

Claims (2)

The decrease in the temperature of sintering 30 is due to the complex effect. of flux components of perlite and zinc oxide. The expansion of the calcination interval, t, e, of color stability from 800 to 1300 ° C is explained by the formation of spinel-type dyeing crystals by strong contact with silicate compounds. Ceramic pigment is obtained according to the following technology. The ceramic mass was crushed, ground to a fineness, allowing passage through a sieve of 900 holes / cm, burned at 1180-1200 ° C, granulated in running water, and milled finenes, allowing passage through a sieve of 10,000 holes / cm. The obtained ceramic pigment, when mixed with finely divided flux or after their joint grinding to the indicated fineness, is a finished ceramic paint. After mixing the specified ceramic paint in glycerol or other material, it is applied to the white eyed surface of the items in the form of a pattern and burned at 800-1300 s, or the specified ceramic pygma is added to the mass of glaze without the addition of flux, with grinding in an amount of 3-6 % by weight of dry glaze and after applying it to the surface of products and drying. burned at 800 1300 C. The compositions of the proposed pigment are given in table. 1. Sanitary, construction and facing products, coated with glazes, developed on the basis of the proposed dye pigment, are characterized by a uniform blue color in the temperature range of 800-1300 s. Physico-technical properties of pigments are given in table. 2. Thus, the proposed pigment, in comparison with the known ceramic pigments, is characterized by a wide firing interval from 800 to 1300 ° C (against 800– 1000 ° C for a known) and lowered sintering temperature of 1180–1200 s (against 1270–1300 ° C for a known ). The economic effect of using the proposed blue pigment is 530 rubles. for one ton. Table 1 5 10 Formula of the Invention A ceramic pigment of blue color, including Si02, A1aOz1, CaO, MgO, CojOj, KjO and NajiO, differs in that, in order to extend the burning interval and decrease the sintering temperature of the pigment, it also contains ZnO in the following ratio components, wt.%: SIOj) 43,, 09 AlnD, 9.17-10.46 0.35-0.41 7 CaO 0.43-0.49 MDO0.31-0.34 SODO 1.8 - 3 , 5 1.58-1.66 NajO 1.54-1.75 ZnO 34-40 Sources of information taken into account during the examination 1. USSR author's certificate I 315707, cl. From 04 To 41/06, 1970. 2. USSR author's certificate 353915, class, C 03 C 5/00, C 09 C 1/28, 1971 (prototype).