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A preparation method of superfine cristobalite in-situ wrapped type γ-ce2s3 red material and its products

A wrapping color material and wrapping type technology, applied in the field of inorganic pigments, can solve the problems of not meeting the requirements of ceramic use, low stable temperature of wrapping color materials, etc., to break through the bottleneck of wrapping technology, improve high temperature stability and acid corrosion resistance, avoid Intrusion effect

Active Publication Date: 2021-11-23
JINGDEZHEN CERAMIC UNIV
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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 packaged 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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  • A preparation method of superfine cristobalite in-situ wrapped type γ-ce2s3 red material and its products
  • A preparation method of superfine cristobalite in-situ wrapped type γ-ce2s3 red material and its products
  • A preparation method of superfine cristobalite in-situ wrapped type γ-ce2s3 red material and its products

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 ; 10mL concentrated ammonia water is added in the oil phase solvent B that is made up of 35mL cyclohexane, 11mL triton, 10mL n-hexanol, stirs 5h at room temperature, makes microemulsion B; After above-mentioned microemulsion A is mixed 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-...

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Abstract

The invention discloses an ultrafine cristobalite in-situ wrapped type γ-Ce 2 S 3 The preparation method of the bright red material is firstly to introduce the cerium source and the silicon source into the microemulsion system, and after the precipitation reaction, centrifuge, wash and dry to obtain the wrapped color material precursor powder, and then carry out vulcanization treatment and high-temperature calcination to produce Obtained ultra-fine cristobalite in-situ wrapped type γ~Ce 2 S 3 Big red material. In addition, the product prepared by the above-mentioned preparation method is also disclosed. The invention synchronously synthesizes the inner color agent γ-Ce through a simple and controllable preparation process 2 S 3 Pigment particles and cristobalite coating layer crystals are wrapped in situ to form the core colorant γ~Ce 2 S 3 The pigment particles are evenly stacked and embedded in the cristobalite coating layer, which is like a pomegranate seed coating structure, which greatly improves the high temperature stability and acid corrosion resistance of the pigment, thereby greatly expanding its application field.

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 Patents(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 UNIV
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