Method for preparing gamma-Ce2S3 red pigment by taking ion-doped CeO2 as precursor and vulcanizing

A technology of ion doping and precursor, which is applied in the field of preparation of ion-doped γ-Ce2S3 red colorant, can solve the problems of unstable crystal structure, insufficient thickness of cladding layer, loss of red color of crystal, etc., and achieve high temperature stability Improvement, high industrial use value, strong high temperature stability

Active Publication Date: 2017-06-13
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, there are generally problems of insufficient coating thickness and incomplete coating during the coating process; in addition, due to the γ~Ce 2 S 3 is the cubic Th 3 P 4 type structure, there are cation vacancies in the crystal structure, and the existence of these cation vacancies leads to γ~Ce 2 S 3 The crystal structure is unstable, and its crystal is prone to reverse transformation at high temperature and loses its red color. Therefore, the problem of instability caused by the crystal structure cannot be solved essentially by simple encapsulation.

Method used

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  • Method for preparing gamma-Ce2S3 red pigment by taking ion-doped CeO2 as precursor and vulcanizing
  • Method for preparing gamma-Ce2S3 red pigment by taking ion-doped CeO2 as precursor and vulcanizing

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Embodiment 1

[0026] In this embodiment, a kind of ion-doped CeO 2 Preparation of γ~Ce for precursor vulcanization 2 S 3 The method for red pigment, its step is as follows:

[0027] (1) Preparation of ion-doped CeO by liquid phase method 2 precursor suspension

[0028] 2g Ce(NO3 ) 3 ·6H 2 O, 0.1g Pr(NO 3 ) 3 ·6H 2 O dissolved in 70mL C 2 h 8 N 2 , stirred vigorously for 100 min, then transferred to a stainless steel reactor lined with polytetrafluoroethylene, and reacted at 250 ° C for 12 h to obtain Pr 3+ ion-doped CeO 2 Precursor suspension;

[0029] (2) Preparation of Pr 3+ ion-doped CeO 2 Precursor powder

[0030] Put the above Pr 3+ ion-doped CeO 2 The precursor suspension was centrifuged at 6000r / min for 3min, washed with water, washed with alcohol, and dried to obtain Pr 3+ ion-doped CeO 2 Precursor powder;

[0031] (3) Preparation of γ~Ce by vulcanization heat treatment 2 S 3 red pigment

[0032] Place 5g NaSCN in the lower layer of the double-layer crucible,...

Embodiment 2

[0034] In this embodiment, a kind of ion-doped CeO 2 Preparation of γ~Ce for precursor vulcanization 2 S 3 The method for red pigment, its step is as follows:

[0035] (1) Preparation of ion-doped CeO by liquid phase method 2 precursor suspension

[0036] 2g CeCl 3 ·7H 2 O, 0.2g Eu(NO 3 ) 3 ·6H 2 O was dissolved in 80mL water, stirred vigorously for 80min, then transferred to a stainless steel reactor lined with polytetrafluoroethylene, and reacted at 240°C for 11h to obtain Eu 3+ ion-doped CeO 2 Precursor suspension;

[0037] (2) Preparation of Eu 3+ ion-doped CeO 2 Precursor powder

[0038] The above Eu 3+ ion-doped CeO 2 The precursor suspension was centrifuged at 6000r / min for 5min, washed with water, washed with alcohol, and dried to obtain Eu 3+ ion-doped CeO 2 Precursor powder;

[0039] (3) Preparation of γ~Ce by vulcanization heat treatment 2 S 3 red pigment

[0040] Place 5g NaHS in the lower layer of the double-layer crucible, and place 0.4g of t...

Embodiment 3

[0042] In this embodiment, a kind of ion-doped CeO 2 Preparation of γ~Ce for precursor vulcanization 2 S 3 The method for red pigment, its step is as follows:

[0043] (1) Preparation of ion-doped CeO by liquid phase method 2 precursor suspension

[0044] 2.5g CeCl 3 ·7H 2 O, 0.15g Pr(NO 3 ) 3 ·6H 2 O dissolved in 70mL C 2 h 8 N 2 , stirred vigorously for 80 min, then transferred to a stainless steel reactor lined with polytetrafluoroethylene, and reacted at 220 ° C for 10 h to obtain Pr 3+ ion-doped CeO 2 Precursor suspension;

[0045] (2) Preparation of Pr 3+ ion-doped CeO 2 Precursor powder

[0046] Put the above Pr 3+ ion-doped CeO 2 The precursor suspension was centrifuged at 6000r / min for 5min, washed with water, washed with alcohol, and dried to obtain Pr 3+ ion-doped CeO 2 Precursor powder;

[0047] (3) Preparation of γ~Ce by vulcanization heat treatment 2 S 3 red pigment

[0048] Place 4.5g NaSCN in the lower layer of the double-layer crucible,...

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Abstract

The invention discloses a method for preparing gamma-Ce2S3 red pigment by taking ion-doped CeO2 as a precursor and vulcanizing. The method comprises the following steps: preparing an ion-doped CeO2 precursor suspension solution through a liquid-phase method; centrifuging the precursor suspension solution, washing with water, washing with alcohol and drying to prepare ion-doped CeO2 precursor powder; vulcanizing the precursor powder at high temperature to obtain the ion-doped stable gamma-Ce2S3 red pigment. Furthermore, the invention further discloses a product prepared by utilizing the preparation method. According to the method disclosed by the invention, doping ions are added so that gamma-Ce2S3 crystal lattices are effectively stabilized and the high-temperature stability of the doped pigment is greatly improved; the obtained pigment product still has a red appearance at the temperature of 800 DEG C so that the application field of the pigment is extremely expanded. The method has the advantages that a preparation process is simple, the high-temperature stability of the product is high, the industrial application value is very high and the industrial popularization and application are facilitated.

Description

technical field [0001] The invention relates to the technical field of inorganic pigments, in particular to an ion-doped γ-Ce 2 S 3 The preparation method of red pigment and the product thereof. Background technique [0002] γ~Ce 2 S 3 Because its dominant wavelength is about 608nm, it has a bright red color, stable color, strong hiding power, and due to 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 Can withstand ultraviolet radiation; at the same time, γ ~ Ce 2 S 3 It is safe and non-toxic, making it the first choice to replace the toxic cadmium selenium red. However, γ~Ce 2 S 3 The colorant can only be used below 350°C, and it will decompose rapidly and turn black when the temperature exceeds this temperature, thus limiting its application at high temperature. [0003] In view of this situation, at present, most of them adopt the wrapping technology in γ~Ce 2 S 3 The surface ...

Claims

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Application Information

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IPC IPC(8): C01F17/00C09C1/00
CPCC01F17/288C01P2002/72C09C1/00
Inventor 李月明高轶群王竹梅沈宗洋马振国
Owner JINGDEZHEN CERAMIC INSTITUTE
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