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Preparation method of aluminum oxide coated gamma-Ce2S3 red pigment and product prepared by preparation method

A wrap-type alumina technology, applied in chemical instruments and methods, inorganic chemistry, fibrous fillers, etc., can solve problems that affect the stability and reliability of production and preparation, product stability, poor compactness of the product wrapping layer, and difficulty in reaction control. To achieve stable and reliable preparation process, stable and reliable product performance, and expand the effect of application fields

Active Publication Date: 2018-06-29
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, silicon oxide, zirconium oxide or zirconium silicate is usually used as the coating layer, although for γ~Ce 2 S 3 The high-temperature stability of the pigment has been improved, but there are still problems such as low encapsulation rate, difficult reaction control, and poor compactness of the product encapsulation layer during the preparation process, which affects the stability and reliability of the production and preparation, as well as the stability of the product. It has brought disadvantages to the promotion and application of industrialization

Method used

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  • Preparation method of aluminum oxide coated gamma-Ce2S3 red pigment and product prepared by preparation method
  • Preparation method of aluminum oxide coated gamma-Ce2S3 red pigment and product prepared by preparation method
  • Preparation method of aluminum oxide coated gamma-Ce2S3 red pigment and product prepared by preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this embodiment, an alumina-wrapped γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0031] (1) Preparation of encapsulated CeO by liquid phase method 2 Precursor Precipitation

[0032] (1-1) 5.5g Ce(NO 3 ) 3 ·6H 2 O, 4.5gAl(NO 3 ) 3 9H 2 O was dissolved in 5ml of water, then dropped into solvent A consisting of 10ml of triton, 30ml of cyclohexane and 8ml of n-hexanol, and stirred at room temperature for 4h to obtain microemulsion A;

[0033] (1-2) 4.5ml of concentrated ammonia water was dropped into a solvent B composed of 10ml of triton, 30ml of cyclohexane and 8ml of n-hexanol, and stirred at room temperature for 4h to obtain a microemulsion B;

[0034] (1-3) According to the volume ratio of solvent A:solvent B=1:1, after mixing microemulsion A and microemulsion B, continue to stir at room temperature for 5h, add acetone to break the emulsion, and obtain CeO wrapped in aluminum hydroxide 2 precursor precipitation;

[0035] (2)...

Embodiment 2

[0040] In this embodiment, an alumina-wrapped γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0041] (1) Preparation of encapsulated CeO by liquid phase method 2 Precursor Precipitation

[0042] (1-1) 5g CeCl 3 ·7H 2 O, 4gAlCl 3 ·6H 2 O was dissolved in 6ml of water, then dropped into solvent A consisting of 12ml of triton, 35ml of cyclohexane and 9ml of n-hexanol, and stirred at room temperature for 4.5h to obtain microemulsion A;

[0043] (1-2) 3.5ml of concentrated ammonia water was dropped into a solvent B consisting of 12ml of triton, 35ml of cyclohexane and 9ml of n-hexanol, and stirred at room temperature for 4.5h to obtain microemulsion B;

[0044] (1-3) According to the volume ratio of solvent A:solvent B=1:1, after mixing microemulsion A and microemulsion B, continue stirring at room temperature for 4.5h, add ethanol to break the emulsion, and obtain CeO wrapped in aluminum hydroxide 2 precursor precipitation;

[0045] (2) Prepara...

Embodiment 3

[0050] In this embodiment, an alumina-wrapped γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0051] (1) Preparation of encapsulated CeO by liquid phase method 2 Precursor Precipitation

[0052] (1-1) 5g CeCl 3 ·7H 2 O, 5gAl(NO 3 ) 3 9H 2 O was dissolved in 6ml of water, then dropped into solvent A composed of 9.5ml triton, 32ml cyclohexane and 8ml n-hexanol, and stirred at room temperature for 7h to prepare microemulsion A;

[0053] (1-2) 4 ml of concentrated ammonia water was dropped into a solvent B composed of 9.5 ml of triton, 32 ml of cyclohexane and 8 ml of n-hexanol, and stirred at room temperature for 7 hours to obtain a microemulsion B;

[0054] (1-3) According to the volume ratio of solvent A:solvent B=1:1, after mixing microemulsion A and microemulsion B, continue to stir at room temperature for 5h, add isopropanol to break the emulsion, and obtain CeO wrapped in aluminum hydroxide 2 precursor precipitation;

[0055] (2) Prepar...

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Abstract

The invention discloses a preparation method of an aluminum oxide coated gamma-Ce2S3 red pigment. The preparation method comprises the following steps: firstly, preparing an aluminum hydroxide coatedCeO2 precursor through a liquid-phase method; then carrying out vulcanization atmosphere and inert atmosphere high-temperature vulcanization heat treatment to obtain the aluminum oxide coated gamma-Ce2S3 red pigment. Furthermore, the invention further discloses a product prepared by the preparation method. According to the preparation method disclosed by the invention, gamma-Ce2S3 is effectively stabilized through coating aluminum oxide, so that the high-temperature stability of the coated modified pigment is greatly improved and an application field of the pigment is extremely expanded; the preparation method disclosed by the invention has the advantages that a technology is simple, reaction is easy to control, and a preparation process and product performance are more stable and reliable, so that industrialized popularization and application is 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 The preparation method of red pigment and the product thereof. Background technique [0002] γ~Ce 2 S 3 Its dominant wavelength is about 608nm, and it is bright red in color, with bright color and strong hiding power; and γ~Ce 2 S 3 the S 3p →Ce 5d The electronic transition of γ has a strong absorption ability to ultraviolet rays, making γ~Ce 2 S 3 Able to withstand UV radiation. At the same time, due to γ~Ce 2 S 3 It is safe and non-toxic, so it has become the first choice to replace the toxic cadmium selenium red. However, γ~Ce 2 S 3 The oxidative decomposition temperature of the pigment is 350°C. If it exceeds this temperature, it will decompose rapidly and turn black, which affects its application at high temperature. [0003] For this reason, at present, research and development have also been conducted to coat one or more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06C01F17/00
CPCC01P2002/72C01P2004/04C09C1/00C09C3/06C01F17/288
Inventor 李月明高轶群沈宗洋王竹梅宋福生马振国
Owner JINGDEZHEN CERAMIC INSTITUTE
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