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Gray ceramic pigment and preparation method thereof

A ceramic pigment and gray technology, which is applied in the field of gray ceramic pigment and its preparation, can solve the problems of poor stability of gray ceramic pigment, high cost of gray ceramic pigment, adverse effects of glaze surface, etc., achieve low raw material price, high temperature stability improvement, The effect of low production cost

Inactive Publication Date: 2019-09-06
FOSHAN HUAYI CERAMIC COLORS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although antimony-tin gray and cobalt-nickel gray are gray in color, the cost of the prepared gray ceramic pigment is relatively high due to the high price of tin oxide and cobalt-nickel gray for preparing antimony-tin gray
Moreover, in antimony tin ash, due to the variable price and volatility of antimony, the stability of the synthesized gray ceramic pigment is poor, and the residual antimony in the synthesis process has an adverse effect on the glaze surface during the use of the gray ceramic pigment.

Method used

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Examples

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preparation example Construction

[0027] Second aspect, the present invention provides a kind of preparation method of gray ceramic pigment, comprises the steps:

[0028] Dissolving iron source and zirconium source in water to form solution A;

[0029] Dissolving sulfide and inorganic base in water to form solution B;

[0030] Mix solution A and solution B uniformly by titration, and control the pH to 8.5-9.5;

[0031] After the titration is completed, white carbon black is added, and after filtering, washing with water, drying, calcining, pickling, washing with water and drying, a gray ceramic pigment in which zirconium silicate is wrapped with iron sulfide is obtained.

[0032] The iron source is at least one of ferric chloride, ferric nitrate and ferric sulfate. Preferably, the iron source is ferric chloride. It can be understood that the iron source in the present invention includes but is not limited to the materials listed above, and may also be other materials not listed in the present invention but ...

Embodiment 1

[0049] A preparation method of gray ceramic pigment, the steps are as follows:

[0050] Dissolving ferric chloride and zirconium oxychloride in water to form solution A;

[0051] Sodium sulfide and sodium hydroxide are dissolved in water to form solution B;

[0052] Add solution A and solution B dropwise to water at the same time, stir while dropping, and control the pH to 9;

[0053] After the titration is completed, stir for 30 minutes, add white carbon black, and stir for 30 minutes;

[0054] Suction filtration, washing with water until the conductivity is less than 500μs / cm, and drying at 110°C;

[0055] Add 8% mass fraction of lithium fluoride to the raw meal obtained, ball mill for 10 minutes, put a crucible and cover it, keep it warm at about 1000°C for 15 minutes, quench it, pickle it with nitric acid, let it stand for 1 hour, wash it with water until neutral, and dry it. Crushed, sieved, packed.

[0056] Wherein, the molar ratio of the ferric chloride, zirconium oxy...

Embodiment 2

[0058] A preparation method of gray ceramic pigment, the steps are as follows:

[0059] Dissolving ferric nitrate and zirconium oxychloride in water to form solution A;

[0060] Sodium sulfide and sodium hydroxide are dissolved in water to form solution B;

[0061] Add solution A and solution B dropwise to water at the same time, stir while dropping, and control the pH to 9;

[0062] After the titration is completed, stir for 30 minutes, add white carbon black, and stir for 30 minutes;

[0063] Suction filtration, washing with water until the conductivity is less than 500μs / cm, and drying at 110°C;

[0064] Add 8% mass fraction of lithium fluoride to the raw meal obtained, ball mill for 10 minutes, put a crucible and cover it, keep it warm at about 1000°C for 15 minutes, quench it, pickle it with nitric acid, let it stand for 1 hour, wash it with water until neutral, and dry it. Crushed, sieved, packed.

[0065] Wherein, the molar ratio of the ferric nitrate, zirconium oxy...

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Abstract

The invention discloses a gray ceramic pigment and a preparation method thereof. The gray ceramic pigment is a wrapping type pigment obtained by wrapping iron sulfide with zirconium silicate; the preparation method comprises the following steps that an iron source and a zirconium source are dissolved into water to form a solution A; the sulfide and inorganic alkali are dissolved into water to forma solution B; the solution A and the solution B are evenly mixed in a titration mode, and pH is controlled to be 8.5-9.5; after titration is completed, white carbon black is added, filtering, washing, drying, calcination, acid washing, washing and drying are performed to obtain the gray ceramic pigment obtained by wrapping iron sulfide with zirconium silicate. A liquid phase co-precipitation method is adopted for forming the gray ceramic pigment of the core-shell structure adopting iron sulfide as a core and adopting zirconium silicate as a wrapping layer , the whole pigment is gray and bright in color, the light emitting strength is remarkably improved, and the high temperature stability of the pigment is greatly improved. The preparation method is simple in technology, the product hightemperature stability is high, raw materials are cheap, the production cost is low, and therefore the pigment can be industrially used, applied and popularized.

Description

technical field [0001] The invention relates to the technical field of ceramic pigments, in particular to a gray ceramic pigment and a preparation method thereof. Background technique [0002] Ceramic pigments belong to the category of inorganic pigments, known for their high-temperature stability in ceramic bodies and glazes, making them different from inorganic pigments widely used in other industries, such as paints and printing pigments. Ceramic pigment is an important material for ceramic decoration. Most of the decoration methods need to rely on ceramic pigment to improve the decorative effect. Therefore, ceramic pigment plays a pivotal role in the ceramic industry. [0003] With the change of interior decoration style, the overall color system of ceramic tiles has undergone significant changes. The yellow style that can be seen everywhere in the past has gradually been replaced by the simple style of black, white and gray. Among them, the gray ceramic tile products h...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/06
CPCC01P2006/22C01P2006/32C01P2006/60C09C1/0012C09C3/063
Inventor 唐帆彭健辉李爱林
Owner FOSHAN HUAYI CERAMIC COLORS CO LTD
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