Preparation method of ultrafine cristobalite in-situ coated gamma-Ce2S3 bright red pigment and product prepared by preparation method

A color wrapping and wrapping technology, applied in the field of inorganic pigments, can solve the problems of not meeting the requirements of ceramic use, the stable temperature of wrapping colorants, etc., to break through the bottleneck of color wrapping technology, and contribute to the promotion and application of industrial production. , the effect of avoiding intrusion

Active Publication Date: 2021-01-05
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For γ~Ce 2 S 3 For the packaging of colorants, the existing packaging methods mostly use the liquid phase method to directly process the ready-made γ-Ce 2 S 3 Commercial colorant powder or colorant precursor powder is wrapped, and the coated colorant obtained by this method is either the coating layer crystal is only adsorbed on the surface of the colorant particle, or the obtained coating material is amorphous, resulting in γ~Ce 2 S 3 The improvement of the temperature stability of the wrapped colorant is very limited (below 550°C), which is far from meeting the requirements for use in high-temperature fields such as ceramics
Therefore, it is urgent to develop a new wrapping material and wrapping technology to solve the existing γ~Ce 2 S 3 Wrapping the problem of low stable temperature of colorants, thus promoting the environment-friendly γ-Ce 2 S 3 Development and application of bright red material in high temperature fields such as ceramics

Method used

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  • Preparation method of ultrafine cristobalite in-situ coated gamma-Ce2S3 bright red pigment and product prepared by preparation method
  • Preparation method of ultrafine cristobalite in-situ coated gamma-Ce2S3 bright red pigment and product prepared by preparation method
  • Preparation method of ultrafine cristobalite in-situ coated gamma-Ce2S3 bright red pigment and product prepared by preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, an ultrafine cristobalite in-situ wrapped type γ-Ce 2 S 3 The preparation method of bright red material, its step is as follows:

[0026] (1) According to the molar ratio Ce:Si=1:3, 6.07gCe(SO 4 ) 2 4H 2 O was dissolved in 5 mL of water, and 9.37 g of ethyl orthosilicate was added to obtain a silicon-containing cerium ion solution; In phase solvent A, stir at room temperature for 3 hours to obtain microemulsion A; add 5 mL of concentrated ammonia water to oil phase solvent B composed of 28 mL of cyclohexane, 8 mL of triton, and 7 mL of n-hexanol, and stir at room temperature for 3 h to obtain microemulsion A Emulsion B; mixing the above-mentioned microemulsion A and microemulsion B and then stirring and reacting at room temperature for 3 hours to obtain the encapsulating colorant precursor solution;

[0027] (2) Add acetone to the above-mentioned packaged colorant precursor solution to break the emulsion, and the precipitate obtained after stand...

Embodiment 2

[0030] In this embodiment, an ultrafine cristobalite in-situ wrapped type γ-Ce 2 S 3 The preparation method of bright red material, its step is as follows:

[0031] (1) According to the molar ratio Ce:Si=1:7, 4.34gCe(NO 3 ) 3 ·6H 2 O was dissolved in 6 mL of water, and 14.58 g of ethyl orthosilicate was added to obtain a silicon-containing cerium ion solution; In phase solvent A, stir at room temperature for 4 hours to obtain microemulsion A; after dissolving 0.8g NaOH in 6mL water, add to oil phase solvent B composed of 32mL cyclohexane, 9mL triton, and 8mL n-hexanol, and stir at room temperature 4h to prepare microemulsion B; mixing the above microemulsion A with microemulsion B and then stirring and reacting at room temperature for 4h to obtain the encapsulating colorant precursor solution;

[0032] (2) Add acetone to the above-mentioned packaged colorant precursor solution to break the emulsion, and the precipitate obtained after standing for 15 minutes is centrifuged...

Embodiment 3

[0035] In this embodiment, an ultrafine cristobalite in-situ wrapped type γ-Ce 2 S 3 The preparation method of bright red material, its step is as follows:

[0036] (1) According to the molar ratio Ce:Si=1:10, 3.73gCeCl 3 ·7H 2 O was dissolved in 10 mL of water, and 28.42 g of Na 2 SiO 3 9H 2 O, to obtain a silicon-containing cerium ion solution; then the above-mentioned silicon-containing cerium ion solution was added to the oil phase solvent A composed of 35mL cyclohexane, 11mL triton, and 10mL n-hexanol, and stirred at room temperature for 5h to obtain microemulsion A ; Add 10mL of concentrated ammonia water into the oil phase solvent B composed of 35mL cyclohexane, 11mL triton, and 10mL n-hexanol, and stir at room temperature for 5h to obtain microemulsion B; after mixing the above microemulsion A with microemulsion B Stirring and reacting at room temperature for 5 hours to obtain the encapsulating colorant precursor solution;

[0037] (2) Add acetone to the above-m...

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Abstract

The invention discloses a preparation method of an ultrafine cristobalite in-situ coated gamma-Ce2S3 scarlet pigment. The preparation method comprises the following steps: introducing a cerium sourceand a silicon source into a microemulsion system, carrying out precipitation reaction, centrifuging, washing, drying to obtain pigment-coated precursor powder, carrying out vulcanization treatment, and carrying out high-temperature calcination to obtain the ultrafine cristobalite in-situ coated gamma-Ce2S3 bright red pigment. In addition, the invention also discloses a product prepared by the preparation method. According to the invention, the inner core color agent gamma-Ce2S3 pigment particles and cristobalite coating layer crystals are synchronously synthesized through a simple and controllable preparation process, and are coated in situ to form a pomegranate seed-like coating structure in which the inner core color agent gamma-Ce2S3 pigment particles are uniformly stacked and embeddedin the cristobalite coating layer so that the high-temperature stability and acid corrosion resistance of the pigment are greatly improved; and the application field is greatly expanded.

Description

technical field [0001] The invention relates to the technical field of inorganic pigments, in particular to an encapsulated γ-Ce 2 S 3 Process for the preparation of colorants and products obtained therefrom. Background technique [0002] Rare earth sesquitype sulfide γ~Ce 2 S 3 It not only presents a bright red color, but also has stable color, strong tinting strength, and more importantly, it is environmentally friendly and non-toxic, so it is considered to be the first choice for replacing traditional toxic pigments such as cadmium sulfur selenide. In 1995, the French Rhone-Planck company took the lead in successfully developing γ~Ce 2 S 3 Red pigment, and its related products have been widely used in plastics, rubber, high-grade coatings and other fields, but there are few reports on the application in high-temperature industries such as ceramics, which is mainly due to the γ~Ce 2 S 3 The high temperature resistance and acid corrosion resistance are poor. In air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/06C09C3/04C01F17/288C01F17/10B82Y40/00
CPCC01P2002/01C01P2002/72C01P2004/64C01P2006/62C01P2006/63C01P2006/64C09C1/00C09C3/006C09C3/04C09C3/043C09C3/063C01F17/10C01F17/288
Inventor 宋福生李月明张小娜沈宗洋王竹梅
Owner JINGDEZHEN CERAMIC INSTITUTE
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