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Cobalt blue pigment for ceramic ink and preparation method of cobalt blue pigment

A ceramic ink and blue technology, which is applied in the field of ceramic pigments, can solve the problems of increased melting temperature of the glaze surface, affecting the appearance of the glaze surface, uneven glaze surface, etc., and achieves low production cost, high color saturation and low hardness Effect

Inactive Publication Date: 2018-05-29
广东丰霖新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But with CoO·Al 2 o 3 The alumina content in the cobalt blue material with spinel as the main body accounts for 60wt%. Since the melting point of alumina is as high as 2045°C, when the ceramic ink prepared from this cobalt blue material is sprayed on the glaze surface, the glaze surface is partially enriched. Excessive alumina will increase the melting temperature of the glaze surface, causing unevenness and wrinkling on the glaze surface, which will affect the appearance of the glaze surface

Method used

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preparation example Construction

[0027] A preparation method of cobalt blue material for ceramic ink includes the following steps:

[0028] S1. Weigh the raw materials: the raw materials include a cobalt source, an aluminum source, and a silicon source.

[0029] In the present invention, the molar ratio of Co:Al:Si in the raw material is (2~4):(2~2.5):(3~5). The invention reasonably controls the ratio of the cobalt source, the aluminum source, and the silicon source, so that the aluminum and the silicon are appropriately excessive, and the prepared product has a bright blue appearance without turning black.

[0030] In the present invention, the cobalt source is preferably cobalt oxide, cobalt carbonate or cobalt hydroxide, but is not limited thereto. The cobalt source is processed by a jet mill in advance to a fineness D100 of not more than 10 μm, preferably, processed to a fineness D100 of less than 7 μm.

[0031] In the present invention, the aluminum source is preferably aluminum hydroxide or calcined alumina, b...

Embodiment 1

[0047] A preparation method of cobalt blue material for ceramic ink includes the following steps:

[0048] S1. Weigh the raw materials: the raw materials are a cobalt source, an aluminum source, and a silicon source, and the molar ratio of Co:Al:Si in the raw materials is 3:2.2:4;

[0049] The cobalt source is cobalt oxide, the cobalt source is processed by a jet mill to a fineness D100 of less than 7 μm; the aluminum source is aluminum hydroxide, and the aluminum source is processed by a jet mill to a fineness D100 of less than 3 μm in advance The silicon source is quartz, and the silicon source is processed in advance by a jet mill to a fineness D100 of less than 8 microns;

[0050] S2. Preliminary mixing: Put the weighed raw materials into the cone mixer for preliminary mixing;

[0051] S3. Powdering: Put the initially mixed raw materials into the claw-type powdering machine for further mixing, so that the raw materials are in full contact;

[0052] S4. Calcining: the powdered raw m...

Embodiment 2

[0055] A preparation method of cobalt blue material for ceramic ink includes the following steps:

[0056] S1. Weigh the raw materials: the raw materials are a cobalt source, an aluminum source, and a silicon source, and the molar ratio of Co:Al:Si in the raw materials is 2:2.5:5;

[0057] The cobalt source is cobalt carbonate, and the cobalt source is processed by a jet mill to a fineness D100 of less than 7 μm; the aluminum source is calcined alumina, and the aluminum source is processed by a jet mill to a fineness D100 of less than 3 μm. The silicon source is quartz, and the silicon source is processed in advance by a jet mill to a fineness D100 of less than 8 microns;

[0058] S2. Preliminary mixing: Put the weighed raw materials into the cone mixer for preliminary mixing;

[0059] S3. Powdering: Put the initially mixed raw materials into the claw-type powdering machine for further mixing, so that the raw materials are in full contact;

[0060] S4. Calcining: the powdered raw mater...

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Abstract

The invention discloses a preparation method of cobalt blue pigment for ceramic ink. The preparation method comprises steps as follows: S1, weighing: a cobalt source, an aluminum source and a siliconsource are weighed; S2, primary mixing: the weighed raw materials are fed into a conical mixing machine for primary mixing; S3, pulverizing: the primarily mixed raw materials are fed into a claw typepulverizer and further mixed uniformly; S4, calcination: the pulverized raw materials are calcined at 1130-1200 DEG C for 2-3 h; S5, smashing and refining: a crude product obtained after calcination is subjected to ultrafine grinding treatment, and a submicron finished product is obtained. According to the preparation method, after the raw materials including the cobalt source, the aluminum sourceand the silicon source are mixed, a mixed crystal with CoO.Al2O3 spinel and 2 CoO.SiO2 olivine as main crystals is synthesized with a solid reaction process, and an eutectic point of Al2O3 and SiO2 can be formed in glaze, so that negative effects of the pigment on the glazed surface can be prevented; meanwhile, unexpected discovery shows that compared with pigment independently prepared from theCoO.Al2O3 spinel and the 2 CoO.SiO2 olivine, the prepared pigment has the advantage that color generation capacity in glaze is remarkably improved.

Description

Technical field [0001] The invention relates to the technical field of ceramic pigments, in particular to a cobalt blue pigment for ceramic ink and a preparation method thereof. Background technique [0002] After the decoration of ceramic products has undergone screen printing and roller printing, inkjet printing has risen to a climax in recent years. Inkjet printing technology has been called the third revolution of my country's ceramic wall and floor tile printing technology, and more and more domestic ceramic companies are optimistic about this development direction. Compared with screen printing and roller printing, inkjet printers have many unparalleled advantages: because they are non-contact decoration, they can be decorated on any uneven surface, so the products are more personalized, realistic, delicate, and richer textures. Variety. At the same time, because the inkjet technology does not need to make a screen, it saves time and improves efficiency. Therefore, it is ...

Claims

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Application Information

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IPC IPC(8): C09D11/32
CPCC09D11/32
Inventor 刘位浪曾令兰
Owner 广东丰霖新材料科技有限公司
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