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Preparation method of black titanium dioxide powder

A technology of black titanium dioxide and titanium dioxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology for materials and surface science, etc., can solve environmental problems and safety issues, and achieve low production cost, strong practicability, and advanced technology The effect of simple method

Inactive Publication Date: 2020-02-14
湖南科莱新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that these reducing agents create environmental and safety concerns

Method used

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  • Preparation method of black titanium dioxide powder
  • Preparation method of black titanium dioxide powder
  • Preparation method of black titanium dioxide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of black titanium dioxide powder, comprising the following steps:

[0032] a. Get 37.83g of ascorbic acid powder and 639.2g of titanium dioxide powder and mix and grind to obtain a mixed powder. The particle diameter of the ascorbic acid powder is 300 μm, and the particle diameter of the titanium dioxide powder is 0.18 μm;

[0033] b. Sinter the mixed powder obtained in step a under a nitrogen atmosphere, the purity of nitrogen is 99%, the rate of nitrogen introduction is 300cc / min, and the temperature is kept at 450° C. for 3 hours to obtain a sintered body;

[0034] c. naturally cooling the sintered body obtained in step b to 50° C., and then fully washing with water to obtain a washed sintered body;

[0035] d. The washed sintered body obtained in step c is dried at a temperature of 100° C. for 24 hours to obtain black titanium dioxide powder.

Embodiment 2

[0037] A preparation method of black titanium dioxide powder, comprising the following steps:

[0038]a. Take 8g of ascorbic acid powder and 320.6g of titanium dioxide powder and mix and grind to obtain a mixed powder. The particle size of the ascorbic acid powder is 0.1 μm, and the particle size of the titanium dioxide powder is 0.1 μm;

[0039] b. Sinter the mixed powder obtained in step a under a nitrogen atmosphere, the purity of nitrogen is 100%, the rate of nitrogen introduction is 280cc / min, and the temperature is kept at 500° C. for 1 hour to obtain a sintered body;

[0040] c. naturally cooling the sintered body obtained in step b to 55° C., and then fully washing with water to obtain a washed sintered body;

[0041] d. The washed sintered body obtained in step c is dried at a temperature of 80° C. for 28 hours to obtain black titanium dioxide powder.

Embodiment 3

[0043] A preparation method of black titanium dioxide powder, comprising the following steps:

[0044] a. Take 58g of ascorbic acid powder and 530.5g of titanium dioxide powder and mix and grind to obtain a mixed powder. The particle size of the ascorbic acid powder is 200 μm, and the particle size of the titanium dioxide powder is 0.2 μm;

[0045] b. Sinter the mixed powder obtained in step a under a nitrogen atmosphere, the purity of nitrogen is 99.9%, the rate of nitrogen introduction is 290cc / min, and the temperature is kept at 400° C. for 2 hours to obtain a sintered body;

[0046] c. naturally cooling the sintered body obtained in step b to 52° C., and then fully washing with water to obtain a washed sintered body;

[0047] d. Drying the washed sintered body obtained in step c at a temperature of 90° C. for 25 hours to obtain black titanium dioxide powder.

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Abstract

The invention discloses a preparation method of black titanium dioxide powder. The preparation method comprises the following steps that ascorbic acid powder and titanium dioxide powder are taken formixing and grinding to obtain mixed powder; the mixed powder is sintered in a nitrogen atmosphere to obtain a sintering body; the obtained sintering body is naturally cooled to 50-55 DEG C, then fullywashed, and the washed sintering body is obtained; and the obtained washed sintering body is dried to obtain the black titanium dioxide powder. By using the preparation method, the bright black titanium dioxide powder is successfully prepared; the black titanium dioxide powder is uniform in color distribution, higher in product brightness, good in high temperature and chemical stability, and hasno possibility of color dilution in use; the black titanium dioxide powder is simple in process method, high in practicality, low in production cost, low in requirements for equipment, high in production efficiency, short in time consuming, complete in reaction, high in quality, and is conducive to large-scale production; and the used raw materials are environment friendly and safe without safetyand environmental problems, and the energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of inorganic material preparation, and in particular relates to a preparation method of black titanium dioxide powder. Background technique [0002] The traditional black pigments are carbon black and iron oxide black (Fe 3 o 4 ). Carbon black has the advantages of high blackness and strong tinting power; however, carbon black is difficult to disperse in water, and when used as a pigment, it has poor compatibility with resins; at the same time, due to its low density, it is easy to cause dust pollution, and carbon black and benzene When the substances are mixed, the carcinogen 3,4-benzopyrene will be produced, which has safety and environmental problems. Iron oxide black is a kind of black fine powder. It has very high hiding power, strong coloring power, good light resistance and weather resistance, but it is magnetic and easy to condense. When used as a black pigment, its chromaticity is unstable and he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/08C01P2002/72C01P2004/62C01P2004/64C01P2006/60C01P2006/80
Inventor 张家松
Owner 湖南科莱新材料有限公司
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