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Magnesium aluminum spinel wrapping type gamma-Ce2S3 red pigment and preparation method thereof

A magnesia-alumina spinel and wrapped technology, which is applied in the preparation of alkaline earth metal aluminate/alumina/aluminum hydroxide, chemical instruments and methods, magnesium aluminate, etc., can solve the problems affecting the stability and reliability of production and preparation and product stability In order to achieve the effect of stable and reliable product performance, high temperature stability and corrosion resistance, and expand the application field

Active Publication Date: 2018-05-15
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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  • Magnesium aluminum spinel wrapping type gamma-Ce2S3 red pigment and preparation method thereof
  • Magnesium aluminum spinel wrapping type gamma-Ce2S3 red pigment and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In this embodiment, a magnesium-aluminum spinel-wrapped type γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0030] (1) Preparation of encapsulated CeO by liquid phase method 2 Precursor Precipitation

[0031] (1-1) 4g Ce(NO 3 ) 3 ·6H2 O, 4gAl(NO 3 ) 3 9H 2 O and, 3g Mg(NO 3 ) 2 ·6H 2 O was dissolved in 5 mL of water, then dropped into solvent A consisting of 12 mL of triton, 36 mL of cyclohexane and 8 mL of n-hexanol, and stirred at room temperature for 5.5 h to obtain microemulsion A;

[0032] (1-2) Add 4 mL of concentrated ammonia water dropwise into a solvent B consisting of 12 mL of triton, 36 mL of cyclohexane and 8 mL of n-hexanol, and stir at room temperature for 5.5 h to prepare microemulsion B;

[0033] (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 5.5h, add isopropanol to break the emulsion, and obtain aluminum h...

Embodiment 2

[0039] In this embodiment, a magnesium-aluminum spinel-wrapped type γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0040] (1) Preparation of encapsulated CeO by liquid phase method 2 Precursor Precipitation

[0041] (1-1) 5g CeCl 3 ·7H 2 O, 5gAlCl 3 ·6H 2 O, 3g MgCl 2 ·6H 2 O was dissolved in 6 mL of water, then dropped into a solvent A consisting of 10 mL of triton, 30 mL of cyclohexane and 8 mL of n-hexanol, and stirred at room temperature for 4 hours to obtain microemulsion A;

[0042] (1-2) Combine 5mLNaOH and Na 2 CO 3 The mixed solution (according to the molar ratio NaOH:Na 2 CO 3 = 2: 1) was dropped into a solvent B composed of 10mL triton, 30mL cyclohexane and 8mL n-hexanol, and stirred at room temperature for 4h to obtain microemulsion B;

[0043] (1-3) Solvent A:solvent B=1:1 according to the volume ratio, after mixing microemulsion A and microemulsion B, continue to stir at room temperature for 5h, add acetone to demulsify, ...

Embodiment 3

[0049] In this embodiment, a magnesium-aluminum spinel-wrapped type γ-Ce 2 S 3 The preparation method of red pigment, its step is as follows:

[0050] (1) Preparation of encapsulated CeO by liquid phase method 2 Precursor Precipitation

[0051] (1-1) 5g CeCl 3 ·7H 2 O, 4gAl(NO 3 ) 3 9H 2 O, 3g Mg(NO 3 ) 2 ·6H 2 O was dissolved in 6 mL of water, then dropped into solvent A consisting of 9.5 mL of triton, 32 mL of cyclohexane and 8 mL of n-hexanol, and stirred at room temperature for 6 h to obtain microemulsion A;

[0052] (1-2) 5 mL of NaOH solution with a concentration of 1.5 mol / L 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 6 hours to obtain microemulsion B;

[0053] (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 6h, add acetone to break the emulsion, and obtain al...

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Abstract

The invention discloses magnesium aluminum spinel wrapping type gamma-Ce2S3 red pigment. The magnesium aluminum spinel wrapping type gamma-Ce2S3 red pigment comprises a gamma-Ce2S3 color body servingas an inner core as well as a magnesium aluminum spinel shell wrapping the color body inner core. In addition, the invention also discloses a preparation method of the wrapping type gamma-Ce2S3 red pigment. The preparation method comprises the following steps: preparing a CeO2 precursor which is jointly wrapped by aluminum hydroxide and magnesium hydroxide by a liquid phase method and then performing high-temperature vulcanization treatment further through vulcanization atmosphere and inert atmosphere to prepare the magnesium aluminum spinel wrapping type gamma-Ce2S3 red pigment. Through wrapping by the magnesium aluminum spinel, the gamma-Ce2S3 is effectively stabilized, the high-temperature stability of the wrapped and modified pigment is greatly improved and the application field is greatly expanded; furthermore, the process is simple, the reaction is easy to control, the preparation process and the product performance are more stable and reliable, so that industrialized popularization and application 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] 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 layers of transparent ...

Claims

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Application Information

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IPC IPC(8): C01F17/00C01F7/16
CPCC01F7/162C01F17/288C01P2004/04C01P2004/84C01P2006/63
Inventor 李月明高轶群王竹梅沈宗洋谢志翔廖润华
Owner JINGDEZHEN CERAMIC INSTITUTE
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