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A kind of submicron cobalt-containing black ceramic pigment and its preparation method and application

A black ceramic, sub-micron technology, used in applications, household appliances, fibrous fillers, etc., can solve the problems of poor stability of nano-scale cobalt black, poor application effect, inability to stabilize color development, etc., and achieve good stability and crystallinity. The effect of grain integrity and prevention of hue change

Active Publication Date: 2020-10-09
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-scale cobalt black has poor stability, easily dissolves in glaze and cannot stabilize color development. Its application effect in ink is not good, and most ink factories still refuse to use nano-color pigments

Method used

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  • A kind of submicron cobalt-containing black ceramic pigment and its preparation method and application
  • A kind of submicron cobalt-containing black ceramic pigment and its preparation method and application
  • A kind of submicron cobalt-containing black ceramic pigment and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A submicron cobalt-containing black ceramic pigment is composed of Co, Fe, Cr elements, and the preparation method comprises the following steps:

[0042] (1) Preparation of nitrate aqueous solution

[0043] Weigh 1.0mol Co(NO 3 ) 2 ·6H 2 O, 1.2mol Fe(OH) 3 and 0.8mol Cr(OH) 3 , added to 1.5L deionized water in turn, adding enough industrial nitric acid to dissolve the powder raw material, stirring and heating the solution at a heating temperature of 50°C, and filtering the solution after the dissolution was completed.

[0044] (2) Gel preparation

[0045] Add 2.5 mol of citric acid monohydrate and 1.0 mol of urea to the solution prepared in step (1), continue heating and stirring to promote the dissolution of citric acid and urea, stop heating and stirring after the solution becomes a viscous fluid, and let stand at room temperature for 24 hours After gel formation. The gel is dried until the water content is less than 0.5%, and the dried gel is crushed and pass...

Embodiment 2

[0055] A submicron cobalt-containing black ceramic pigment is composed of Co, Fe, Cr, Cu, Ni, Mn elements. The preparation method comprises the following steps:

[0056] (1) Preparation of nitrate aqueous solution

[0057] Weigh 0.4mol Co(NO 3 ) 2 ·6H 2 O, 0.2mol Ni(OH) 2 , 0.2mol CuO, 0.2mol MnO1.2molFe(OH) 3 and 0.8mol Cr(OH) 3 , added to 2.0L deionized water in turn, adding enough industrial nitric acid to dissolve the powder raw material, stirring and heating the solution, the heating temperature was 70°C, and filtering the solution after the dissolution was completed.

[0058] (2) Gel preparation

[0059] Add 3.0 mol of citric acid monohydrate and 1.0 mol of urea to the solution prepared in step (1), continue heating and stirring to promote the dissolution of citric acid and urea, stop heating and stirring after the solution becomes a viscous fluid, and let stand at room temperature for 24 hours After gel formation. The gel is dried until the water content is less...

Embodiment 3

[0068] A submicron cobalt-containing black ceramic pigment is composed of Co, Fe, Cr elements, and the preparation method comprises the following steps:

[0069] (1) Preparation of nitrate aqueous solution

[0070] Weigh 1.0mol Co(NO 3 ) 2 ·6H 2 O, 0.7mol Fe(OH) 3 and 1.3mol Cr(OH) 3 , added to 1.5L deionized water in turn, adding enough industrial nitric acid to dissolve the powder raw material, stirring and heating the solution at a heating temperature of 50°C, and filtering the solution after the dissolution was completed.

[0071] (2) Gel preparation

[0072] Add 2.5 mol of citric acid monohydrate and 1.0 mol of urea to the solution prepared in step (1), continue heating and stirring to promote the dissolution of citric acid and urea, stop heating and stirring after the solution becomes a viscous fluid, and let stand at room temperature for 24 hours After gel formation. The gel is dried until the water content is less than 0.5%, and the dried gel is crushed and pass...

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Abstract

The invention belongs to the field of ceramic pigments, and discloses a sub-micron cobalt-containing black ceramic pigment and a preparation method thereof. The method is characterized in that at least one of nitrate, oxide and hydroxide of an element A and at least one of nitrate, oxide and hydroxide of an element B are taken as raw materials to prepare a nitrate aqueous solution, wherein A is equal to Co+Ni+Cu+Mn, and B is equal to Fe+Cr; citric acid, glycine and urea are added, are stirred and heated to prepare gel; the gel is dried and crushed, and provided with NaCl for being ball-milledand mixed, and cobalt black pigment, which has a spinel structure, good crystalline grain development and a grain size of 0.1-1.0 mum, for ceramic ink is prepared through roasting treatment, washing,drying and gas-flow crushing. Compared with commercial cobalt black synthesized through a solid-phase method, the sub-micron cobalt black can be applied to ceramic ink-jet ink without secondary grinding, so that the pigment is prevented from color-phase changes as a result of excessive grinding, and therefore, production processes of ink can be simplified, and ink production cost is reduced.

Description

technical field [0001] The invention belongs to the field of ceramic pigments, in particular to a submicron cobalt-containing black ceramic pigment and its preparation method and application. Background technique [0002] Ceramic pigments, also known as ceramic pigments, are mainly used for coloring architectural ceramics, daily ceramics, artistic ceramics, and sanitary ceramic bodies or glazes. Ceramic products need to be fired at high temperature. Most organic pigments and most inorganic pigments will decompose at high temperature and cannot develop stable color. Only a few inorganic pigments with high high temperature stability can be used as ceramic pigments. As far as the number of varieties is concerned, ceramic pigments are only a small branch of the pigment family, but they are indeed important raw materials necessary in the ceramic industry, so there are many related researches. [0003] Among the many color ceramic pigments, black ceramic pigments are an important...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09D11/328C09D7/61C08K3/38
CPCC01P2006/16C08K3/38C09C1/0009C09D11/328
Inventor 郑华德艾树鹤张明
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION