SU1719329A1 - Grey-pink ceramic pigment - Google Patents

Abstract

This invention relates to a process for the production of ceramic pigments used to decorate porcelain, fur, majolica, glass, or the dyeing of white glazes of ceramic products. The aim of the invention is to increase the purity of tone and alkali resistance. Ceramic gray-pink pigment contains, wt%: SI02 40.0-50.0; ABOZ 10.0-15.0, - K20 8.0-12.0; MnO20.0-27.0; Znb 5.0-13.0. 2 tab.

Description

This invention relates to a process for the production of ceramic pigments used to decorate porcelain, fur, majolica, glass, or the dyeing of white glazes of ceramic products.

A pink ceramic pigment of the following composition is known, in wt.%: A (OH) s 76.1: MpSOz 14.40: NH4H2PO4 9.50.

The closest to the proposed technical essence to the achieved result is a ceramic gray-pink pigment of the following composition, wt.%:

SI02

AI203

Tio2

Rv20z SaO MDO K20

N820

MlO V20z

55., 4

15.09-17.22

0.06-0.12

0.08-0.15

0.04-0.62

0.09-0.13

8.75-9,22

2.4-2.7

7.0-15,0

0.5-2.0

The disadvantages of a known pigment composition are low purity, brightness and chemical stability.

The purpose of the invention is to increase the purity of tone and alkali resistance.

The goal is achieved by the fact that a ceramic gray-pink pigment, including SiO2. AfcOa, MnO, CgO, additionally contains ZnO in the following ratio, wt.%:

SI0240.0-50.0

A12Oz10,0-15.0

KaO8,0-12,0

MpO20.0-27.0;

ZnO 5-13,0

It is known that as a result of heat treatment, the formation of ZnMn04 resistant spinel of red-brown color is possible.

However, ZnO is not used in the above pigment formulations.

For the synthesis of pigments, quartz sand, alumina, potash, manganese carbonate or manganese oxide, and zinc oxide are used as raw materials. The ceramic pigment is prepared as follows.

Example. Components of the charge, May. %: fine quartz sand 40.0;

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alumina 15.0; potash 14.7; (K20 10.0); manganese (II) oxide 22.0; Zinc whitewash 13.0, crushed in a sea mill with a ratio of material: grinding media: water 1: 1.2: 0.8, ensuring the passage through the sieve of 10 thousand holes / cm with the residue on the sieve of not more than 0.5% and burned at 50 ° C with a shutter speed of 1 h.

Then, the resulting spec is ground in a sea mill at this ratio material: grinding media: water 1: 1.2: 0.8. The residue on the sieve 10 thousand holes / cm2 not more than 0.5 ..

The finished ground glaze is thoroughly mixed with pigment in an amount of 5 wt.% And applied to the surface of the ceramic product, calcined at 1000 ° C.

The determination of the physicochemical properties of pigments is carried out in accordance with accepted methods.

The remaining examples are carried out analogously to example 1. but differ in the compositions of the components.

In tab. 1 shows the composition of the proposed pigment.

The properties of the proposed, basic composition and prototype are given in table. 2

As can be seen from the data table. 2, the proposed composition has a higher alkali resistance by 1-2%, the reflection coefficient and the purity of the tone are higher by 3-4% compared with the prototype. The synthesis temperature is lower by 50 ° C.

Pigment No. 43 was chosen as the base pigment, obtained on the basis of the following composition, wt%: A (OH) s 76.1: MpSOz 14.40; NH4H2P04 4.5. The synthesis temperature is 1160 ° C.

Formula was invented and Ceramic gray-pink pigment, including S1O2,. K20, MpO, characterized in that, in order to increase the purity of tone and alkali resistance. it additionally contains ZnO in the following ratio, wt.%:

SI0240-50

A 20s10-15

K208-12

MpO20-27

ZnO5-13

Claims (1)

Claim Ceramic gray-pink pigment, including SIO2, AI2O3. KrO, MnO, characterized in that, in order to increase the purity of the tone and alkali resistance, it additionally contains ZnO in the following ratio of components, wt.%: SIO240-50 AI2O310-15 KgO8-12 MpO20-27 ZnO5-13 T_a_b_l_i_u_a__1 Components The content of components, wt.%, In the compositions of the pigments '] 2 3 | 4 (ref) 5 (ref.) Quartz sand (S1O.,) 40,0 47.0 50,0 30,0 60.0 Alumina (Al _t O ₄ ) 15.0 13.0 10.0 20,0 5,0 Potash (K _r 0) 10.0 12.0 8.0 15.0 5,0 MnO 22.0 20,0 27.0 33.0 5,0 Zno 13.0 8.0 5,0 2.0 25.0 Indicators _____________________ 1_a_b_l_i_u_a__2 Pigment composition Proposed Beyond Prototype Base ’L · 1 3 4 ₅ Chemical resistance to NaOH, 1 95.0 95.6 95.8 92.3 90.5 94.38 92.0 Tone purity,% 32.0 31.5 30,0 25.0 23.0 28.0 24.0 Reflection coefficient, % 36.0 38.0 37.0 28.0 29.0 35.0 30,0 Firing temperature, ° C 1150 115? 1150 1150 1150 1200 1160