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Preparation method of mullite-coated gamma-Ce2S3 red pigment and product prepared by same

A -ce2s3, packaged technology, applied in the field of preparation of packaged γ-Ce2S3 red pigment, can solve the problems of low temperature resistance, poor package effect, etc., achieve the effect of lowering synthesis temperature, improving chroma, and requiring less equipment

Active Publication Date: 2022-03-08
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used wrapping materials include silica, alumina, zirconia, and zirconium silicate. Although the temperature and chemical stability of the colorant have been improved to a certain extent, there are still problems such as poor wrapping effect and low temperature resistance.

Method used

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  • Preparation method of mullite-coated gamma-Ce2S3 red pigment and product prepared by same
  • Preparation method of mullite-coated gamma-Ce2S3 red pigment and product prepared by same
  • Preparation method of mullite-coated gamma-Ce2S3 red pigment and product prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, a kind of mullite-wrapped γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0028] (1) Preparation of solution

[0029] Cerium nitrate hexahydrate, aluminum nitrate nonahydrate, citric acid monohydrate, urea, sodium nitrate, according to the molar ratio Ce 3+ : Al 3+ : Citric acid: Urea: Na + = 1:5:2:2:0.2 Mix well and dissolve in water to get Al 3+ Solution A with a concentration of 0.1mol / L;

[0030] According to the mass ratio of tetraethyl orthosilicate: ethanol = 1: 4, dissolve tetraethyl orthosilicate in ethanol and mix uniformly to obtain solution B;

[0031] (2) Preparation of precursor powder

[0032] According to molar ratio Si 4+ : Al 3+ = 2: 3.2, after uniformly mixing the above solution A and solution B, stir magnetically at room temperature for 2 hours, then gelatinize the solution at 70°C for 36 hours, and dry the obtained gel at 100°C to obtain dry Gel, after being fully ground, calcined at 400°C fo...

Embodiment 2

[0036] In this embodiment, a kind of mullite-wrapped γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0037] (1) Preparation of solution

[0038] Cerium nitrate hexahydrate, aluminum nitrate nonahydrate, citric acid monohydrate, urea, potassium nitrate, according to the molar ratio Ce 3+ : Al 3+ : citric acid: urea: K + = 1:5:1:1:0.15 homogenized and dissolved in water to obtain Al 3+ Solution A with a concentration of 0.15mol / L;

[0039] According to the mass ratio of tetraethyl orthosilicate: ethanol = 1: 4, dissolve tetraethyl orthosilicate in ethanol and mix uniformly to obtain solution B;

[0040] (2) Preparation of precursor powder

[0041] According to molar ratio Si 4+ :Al 3+ =2:3, after uniformly mixing the above solution A and solution B, stir magnetically at room temperature for 2 hours, then gel the solution at 80°C for 30 hours, and dry the obtained gel at 100°C to obtain dry Gel, after being fully ground, calcined at 500°C for...

Embodiment 3

[0045] In this embodiment, a kind of mullite-wrapped γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0046] (1) Preparation of solution

[0047] Cerium nitrate hexahydrate, aluminum nitrate nonahydrate, citric acid monohydrate, urea, barium nitrate, according to the molar ratio Ce 3+ :Al 3+ : Citric acid: Urea: Ba 2+ = 1:5:3:3:0.1 Mix well and dissolve in water to get Al 3+ Solution A with a concentration of 0.2mol / L;

[0048] According to the mass ratio of tetraethyl orthosilicate: ethanol = 1: 4, dissolve tetraethyl orthosilicate in ethanol and mix uniformly to obtain solution B;

[0049] (2) Preparation of precursor powder

[0050] According to molar ratio Si 4+ :Al 3+ =2:3.5, after uniformly mixing the above solution A and solution B, stir magnetically at room temperature for 2 hours, then gel the solution at 90°C for 24 hours, and dry the obtained gel at 100°C to obtain dry Gel, fully ground and calcined at 600°C for 1 hour in air atm...

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Abstract

The invention discloses a preparation method of a mullite-coated gamma-Ce2S3 red pigment, which comprises the following steps: preparing mixed precursor powder of aluminum oxide, silicon oxide and cerium oxide by a sol-gel method, and carrying out vulcanization heating treatment to obtain the mullite-coated modified gamma-Ce2S3 red pigment. In addition, the invention also discloses a product prepared by using the preparation method of the mullite coated gamma-Ce2S3 red pigment. Through a simple preparation process, the coated pigment with excellent chemical stability and temperature stability reaching 800 DEG C is obtained, and the use temperature range of gamma-Ce2S3 is greatly expanded, so that the use field of gamma-Ce2S3 is expanded, and industrial application and popularization are facilitated.

Description

technical field [0001] The invention relates to the technical field of inorganic pigments, in particular to an encapsulated γ-Ce 2 S 3 Preparation method of red pigment and product thereof Background technique [0002] The red tone is rich in connotation and profound, and has always been regarded as a symbol of all good things such as celebration, peace, and progress. Among most of the red pigments currently used, cadmium sulfoselenide (CdS 1-x Se x ) is still widely used and the only inorganic pigment that can produce a high-temperature bright red tone, and has successfully become the only bright red pigment used in the ceramic industry so far. However, the highly toxic heavy metal element Cd contained in CdSe 1-x S x The production, use and subsequent waste treatment of pigments have serious adverse effects on human life safety and the environment, which is not conducive to green and healthy development and the construction of a resource-saving and environment-friend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C01F17/288C01F17/10C01B33/26
CPCC09C1/0081C01F17/288C01F17/10C01B33/26C01P2002/72C01P2004/04C01P2006/60C01P2006/62C01P2006/63C01P2006/64C01P2004/80Y02P20/10
Inventor 李月明任德威李志科孙熠李恺王竹梅
Owner JINGDEZHEN CERAMIC INSTITUTE