SU1381088A1 - Ceramic pigment - Google Patents

Abstract

The invention relates to a technology for producing ceramic pigments for building ceramics and can be used in the manufacture of colored glazed ceramic tiles and sanitary ware. The aim of the invention is to increase the stability in the glaze melt and to expand the color gamut from intense blue to blue. For this, the ceramic pigment contains, wt%: CojO, 15-30; ZnO 5-20; AljO, 40-60; Cr, 0j 7-12; 8.0 2-4. The pigment is stable in the glaze melt, the saturation of the color tone is 29.4 - 33.9%, the pigment provides the color from blue to blue. S

Description

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The invention relates to the technology of producing ceramic pigments for building ceramics and can be used in the production of colored glazed ceramic tiles and sanitary ware products,

The purpose of the invention is to increase the stability in the glaze melt and to expand the color range from intense blue to blue.

The composition of the ceramic pigment is presented in table. one.

These compositions have the following properties, presented in table. 2

The following raw materials are used to manufacture the ceramic pigment: cobalt oxide (,

ten

15

go pigment. If the pigment is not destroyed in an aggressive alkaline glaze melt, then after the furnace tiles they have a blue color with a color tone of 478-480 nm and a reflex of 2.44 A is recorded on X-ray, the reflex height in mm is measured.

Claims (1)

Invention Formula Ceramic pigment, including Co, 0j, ZnO, Al, 0j, Cr, 0z, BjO, is characterized by the fact that, in order to increase the stability in the glaze melt and expand the color range from intense blue to blue, it contains indicated compone CoO or), zinc white, gly-2o the following amounts, wt.%: nozem, chromium oxide, boric acid. The proposed pigment has the following charge composition, wt.%: CO; jOj ZnO AUO, Cr, 0j B, 0 j 15-30 5-20 40-60 7-12 2-4 Cobalt oxide Zinc white Alumina Chromium oxide Borna acid 14.6-28.9 4.9-19.9 39.2-59.2 6.8-11.6 3.5-6.9 The components of the mixture are ground in a ball mill to a residue of 0.1-0.2% on the grid 0056. The pigment mixture is calcined at 1250 ° C (by pyroscopes) and maintained at the final temperature for 4 hours. The calcined pigment is milled by a wet process until it passes through a 0056 sieve. The specific surface area of the ground pigment is 3500-5000. The pigment is metered into the glaze in an amount of from 0.2 to 5%, depending on the desired saturation; the color tone of the coating. For glazing tiles use glaze NL-10 with 5% appropriate go pigment. If the pigment is not destroyed in an aggressive alkaline glaze melt during firing, then after the tiles exit the kiln, they have a blue color with a color tone of 478-480 nm and a reflex of 2.44 A is recorded on X-ray films, while the height of the reflex is measured in mm. Invention Formula Ceramic pigment, including Co, 0j, ZnO, Al, 0j, Cr, 0z, BjO, which is characterized by the fact that, in order to increase stability in the glaze melt and expand the color range from intense blue to blue, it contains component5 CO; jOj ZnO AUO, Cr, 0j B, 0 j 15-30 5-20 40-60 7-12 2-4 T a b l and c a 1 Components one Composition, wt.% rzjzi d five Co, o, ZnO Cr, 0j 8.05 30 5 49 12 four 25 20 40 12 20 ten 60 eight 15 20 56 7 table 2 The stability of the pigment in the glaze of NL-10 is characterized by the intensity of the main spinel reflex according to x-ray analysis. Relative units (mm). Reflex 2,44 A sin spinel The color tone of the coating glaze NL-10 at a dosage of pigment 5%, nm Color saturation 71 67 59 42 478 479 480 480