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Crystalline silicon dioxide wrapped gamma-Ce2S3 red pigment and preparation method thereof

A silicon dioxide and crystalline technology, applied in the field of inorganic pigments, can solve the problems of poor compactness, incomplete wrapping, and easy damage of the wrapping layer, achieve excellent acid corrosion resistance and high temperature oxidation resistance, improve wrapping efficiency, and improve The effect of product quality

Active Publication Date: 2019-03-12
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing technology is in the package type γ~Ce 2 S 3 In the preparation process of red pigment, the packaging methods used include hydrothermal method, hydrolysis method, sol-gel method, etc., and the packaging materials include silica, zinc oxide, zirconium silicate, etc., although the temperature stability of the pigment There has been a certain improvement, but there are still problems such as incomplete wrapping and poor compactness of the wrapping layer. It is unstable and easily damaged at high temperatures, and its application range, especially in the field of high-temperature ceramic production, is still greatly restricted.

Method used

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  • Crystalline silicon dioxide wrapped gamma-Ce2S3 red pigment and preparation method thereof
  • Crystalline silicon dioxide wrapped gamma-Ce2S3 red pigment and preparation method thereof
  • Crystalline silicon dioxide wrapped gamma-Ce2S3 red pigment and preparation method thereof

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Embodiment 1

[0029] In this embodiment, a crystalline silica-encapsulated γ~Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0030] (1) Preparation of raw material solution

[0031] Cerium source solution: according to molar ratio Ce 3+ : HNO 3 :Urea:Na + =1:4:8:0.2, Ce(NO 3 ) 3 ·6H 2 O, concentration is that nitric acid, urea, sodium nitrate of 0.1mol / L are dissolved in the alcohol-water mixture that is made up of 10mL deionized water and 15mL dehydrated alcohol, obtain doping with Na + The cerium source solution;

[0032] Silicon source solution: Dissolve tetraethyl orthosilicate in absolute ethanol according to the volume ratio of tetraethyl orthosilicate: dehydrated alcohol=1:2 to obtain a silicon source solution;

[0033] (2) According to the molar ratio Si 4+ : Ce 3+ =5:1, pour the above silicon source solution into doped Na + Stir and mix in the cerium source solution evenly, add nitric acid to adjust the pH value of the mixed solution to 1, and ...

Embodiment 2

[0038] In this embodiment, a crystalline silica-encapsulated γ~Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0039] (1) Preparation of Li + Doped precursor powder

[0040] (1-1) Preparation of raw material solution

[0041] Cerium source solution: according to molar ratio Ce 3+ : HNO 3 :Urea:Li + =1:6:7:0.1, Ce(NO 3 ) 3 ·6H 2 O, concentration is that nitric acid, urea, lithium nitrate of 0.1mol / L are dissolved in the alcohol-water mixture that is made up of 10mL deionized water and 15mL dehydrated alcohol, obtain doping with Li + The cerium source solution;

[0042] Silicon source solution: Dissolve tetraethyl orthosilicate in absolute ethanol to obtain a silicon source solution according to the volume ratio tetraethyl orthosilicate: dehydrated alcohol=1:2.5;

[0043] (1-2) According to the molar ratio Si 4+ : Ce 3+ = 6:1, the above silicon source solution is poured into doped with Li + Stir and mix evenly in the cerium source solution...

Embodiment 3

[0047] In this embodiment, a crystalline silica-encapsulated γ~Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0048] (1) Preparation of Li + 、Na + Co-doped precursor powder

[0049] (1-1) Preparation of raw material solution

[0050] Cerium source solution: according to molar ratio Ce 3+ : HNO 3 :Urea:Li + :Na + =1:5:8:0.05:0.05, Ce(NO 3 ) 3 ·6H 2 O, concentration is that the nitric acid of 0.1mol / L, urea, lithium nitrate, sodium nitrate are dissolved in the alcohol-water mixture that is made up of 10mL deionized water and 15mL dehydrated alcohol, obtain Li + 、Na + Co-doped cerium source solution;

[0051] Silicon source solution: Dissolve tetraethyl orthosilicate in absolute ethanol according to the volume ratio of tetraethyl orthosilicate: dehydrated alcohol=1:3 to obtain a silicon source solution;

[0052] (1-2) According to the molar ratio Si 4+ : Ce 3+ =5.5:1, pour the above silicon source solution into Li + 、Na + Stir and mix ...

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Abstract

The invention discloses crystalline silicon dioxide wrapped gamma-Ce2S3 red pigment. The crystalline silicon dioxide wrapped gamma-Ce2S3 red pigment is prepared from crystalline silicon dioxide base bodies and gamma-Ce2S3 pigment particles wrapped with the base bodies; and the two or more gamma-Ce2S3 pigment particles are inlaid in each crystalline silicon dioxide base body. In addition, the invention further discloses a preparation method of the crystalline silicon dioxide wrapped gamma-Ce2S3 red pigment and a prepared product. The wrapped gamma-Ce2S3 red pigment adopts crystalline silicon dioxide as a wrapping body, wrapping is complete, a wrapping layer is compact, and the wrapped gamma-Ce2S3 red pigment has excellent acid corrosion resisting and high-temperature oxidation resisting properties; and the wrapped gamma-Ce2S3 red pigment is prepared through an acid and alkaline stepped catalysis sol-gel method, the process is easy to operate, the wrapping efficiency is high, the wrappedgamma-Ce2S3 red pigment can well adapt to the development tendency of environmental friendliness and clean production, and industrial production of the crystalline silicon dioxide wrapped gamma-Ce2S3red pigment and development and popularization of the technology of the crystalline silicon dioxide wrapped gamma-Ce2S3 red pigment 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 Red pigment and its preparation method. Background technique [0002] Red pigments are usually divided into two categories: organic red pigments (abbreviated as organic red) and inorganic red pigments (abbreviated as inorganic red). Organic red has bright luster and strong tinting power, but its hiding power, heat stability, light stability and ability to resist ultraviolet radiation are poor, so it is difficult to completely replace inorganic red. Most of the currently used inorganic reds contain cadmium, lead, mercury and other heavy metal elements that are extremely harmful to the human body. Along with the higher and higher requirements of environmental protection, many countries have formulated strict regulations in recent years to restrict or prohibit the use of toxic pigments that pollute the environment. Adapt to society's require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06C09C3/04
CPCC01P2002/01C01P2002/72C01P2004/61C01P2004/62C01P2006/62C01P2006/63C01P2006/64C09C1/00C09C3/006C09C3/043C09C3/063
Inventor 李月明吴福灵李志科王竹梅沈宗洋
Owner JINGDEZHEN CERAMIC INSTITUTE
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