SU1717565A1 - Blue ceramic pigment - Google Patents

Abstract

The invention relates to compositions of ceramic pigments used as overglaze paints for application to porcelain products. The purpose of the invention is to increase the purity of the tone. For this, the pigment contains, wt%: CoO 42.0-47.0; Si20 7.7-9.7; A1203 8.0-12.0; B203 20.0-32.8; P2U5 9.5-11.0. The purity of the pigment tone is 15% .2 table

Description

The invention relates to compositions of ceramic pigments used as overglaze paints for application to porcelain products.

Known ceramic pigment blue, including wt,%: SI02 39-46; CaO 36-43; MDO 1.2-1.7; 0.05-1; No. 200-1-2; CoO 0.1-22.

A disadvantage of the known pigment is the high sintering temperature.

Closest to the invention is a blue colored ceramic pigment, comprising, in wt.%: CoO 40.0-45.0; SI02 13.3-15.0; 20.2-23.6: Li20 6.0-7.0; B203 13.8-16.1. Although this pigment has a low sintering temperature of 1000-1050 ° C, this is not sufficient for production.

The aim of the invention is to increase the purity of the tone.

The raw materials used are cobalt oxide, kaolin Pros novsky, the following chemical composition, wt%: SiO2 45.30; Re203 0.78; 0.32; 38.52; CoO 0.88; MDO 0.38; K20 0.43; Na20 0.12; ppt 13.27; alumina, boric acid, ammonium phosphate.

The components weighed in the calculated quantities are mixed and ground in a ball mill using a wet method with a material: grinding media: water ratio of 1.0: 1.0: 1.0, ensuring the passage through a 10000 sieve / cm sieve. The resulting slurry is dehydrated by drying at 105-110 ° C to a residual moisture content of 2%, then fired at an optimum temperature of 950-1000 ° C with a holding time of 6 hours and ground in a ball mill to a residue on a sieve of 10000otv / cm2 not more than 0.5% subsequent drying and sifting. The resulting pigment is mixed with a colorless glaze in the ratio of 1: 1.5.

The resulting cobalt paint is applied to porcelain in the form of a pattern or with a continuous coating of 35-45% of suspensions. The paint does not dissolve in water. The reaction of the water extract is neutral.

Table 1 presents the composition of pigments.

Table 2 presents the physico-chemical properties of the compositions.

Formula of invention

Ceramic pigment blue, including CoO, SI02, A120z. B20z, different

WITH

ate

and in order to increase the purity of the tone, it additionally contains PaOs in the following ratio, wt.%:

42-47 7.7-9.7 8-12

20.3-32.8 9.5-11.0

Table 1

ten

Table 2

Claims (1)

Claim Blue ceramic pigment, including CoO, SiO ₂ , A! ₂ 0c. In ₂ 0z, distinguishing 1717565 A1 st with the fact that, in order to increase the purity of the tone, it additionally contains P2O5 in the following ratio of components, wt.%: Soo 42-47 SIO2 7.7-9.7 AI2O3 8-12 In ₂ 0s „ 20.3-32.8 P2O5 9.5-11.0 Table 1 Items The content of elements in the composition, wt.% I II III Soo 42.0 46.0 47.0 SIO2 7.7 8.7 9.7 AI2O3 i 8.0 10.0 12.0 B2O3 32.8 25.0 20.3 P2O5 9.5 10.3 11.0 Table 2 Properties Performance indicators in the compositions 1 II III Famous Dominant wavelength, nm 483 483 483 460 Tone purity P,% fifteen fifteen fifteen 10 Synthesis temperature. ° C 950 950 950 1050 Water extract reaction Neutral Neutral Neutral Neutral The main color-forming phase Sovgoz CoBrO ^ COB2O4 SOAGOD Chemical resistance j noj to 4% CH3COOH 99.94 99.88 99.82 Color • Blue Compiled by S. Azimov Editor V. Bugrenkova Tehred M. Morgenthal Corrector N.Korol Order 850 Circulation 'Subscription VNIIIPI State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab ,, 4/5 Production and Publishing Plant Patent ”, Uzhgorod, 101 Gagarina St.