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Doped high-infrared reflection rare-earth sesquisulfide gamma-Ce2S3 coated mica pearlescent pigment and preparation method thereof

A pearlescent pigment, infrared reflection technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of monotonous cerium sulfide, affecting the color of nuclear materials, and decreasing tinting strength, etc. High ultraviolet absorption and near-infrared reflection performance, the effect of improving performance

Inactive Publication Date: 2016-10-12
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a thick coating will affect the color of the core material itself, resulting in a decrease in tinting strength
In addition, cerium sulfide pigments are relatively monotonous and have low brightness, which cannot meet people's color needs.

Method used

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  • Doped high-infrared reflection rare-earth sesquisulfide gamma-Ce2S3 coated mica pearlescent pigment and preparation method thereof
  • Doped high-infrared reflection rare-earth sesquisulfide gamma-Ce2S3 coated mica pearlescent pigment and preparation method thereof
  • Doped high-infrared reflection rare-earth sesquisulfide gamma-Ce2S3 coated mica pearlescent pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Ce 2-x Y x S 3 (x=0.1) preparation of coated mica pearlescent pigment

[0025] (1) Mica pretreatment: hydrochloric acid with a mass fraction of 5wt.% and the solid-to-liquid ratio of mica is 1:10, stirred and cleaned in a water bath at 80°C for 30 minutes, filtered, washed, and dried, and 3g of pretreated mica was prepared to make 10wt .% mica slurry.

[0026] (2) Preparation of mixed oxide-coated mica pearlescent pigments: Ce(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2O, citric acid, acrylamide, and glucose weighed 1.425 g, 0.066 g, 2.18 g, 0.98 g, and 3 g respectively according to a certain stoichiometric ratio, dissolved in an appropriate amount of deionized water, then dropped into 5 ml of acetylacetone, and mixed with mica slurry to prepare 100ml suspension. Stir the suspension magnetically for 20 minutes and turn it to a water bath at 80°C for heating and stirring. Mix the suspension until it becomes viscous and stop stirring. Continue to keep warm unt...

Embodiment 2

[0028] Example 2 Ce 2-x Y x S 3 (x=0.3) preparation of coated mica pearlescent pigment

[0029] (1) Mica pretreatment: hydrochloric acid with a mass fraction of 5wt.% and the solid-to-liquid ratio of mica is 1:10, stirred and cleaned in a water bath at 80°C for 30 minutes, filtered, washed, and dried, and 3g of pretreated mica was prepared into 10wt .% mica slurry.

[0030] (2) Preparation of mixed oxide-coated mica pearlescent pigments: Ce(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O, citric acid, acrylamide, and glucose weighed 1.309g, 0.204g, 2.18g, 0.98g, and 3.5g respectively according to a certain stoichiometric ratio, dissolved in an appropriate amount of deionized water, then dropped into 4ml of acetylacetone, and mixed with mica slurry Prepare 100ml suspension. Stir the suspension magnetically for 30 minutes, turn it to a water bath with a temperature of 70°C, heat and stir, mix the suspension until it becomes viscous and stop stirring, then continue to keep warm u...

Embodiment 3

[0032] Example 3 Ce 2-x Y x S 3 (x=0.5) preparation of coated mica pearlescent pigment

[0033] (1) Mica pretreatment: hydrochloric acid with a mass fraction of 5wt.% and the solid-to-liquid ratio of mica is 1:10, stirred and cleaned in a water bath at 80°C for 30 minutes, filtered, washed, and dried, and 3g of pretreated mica was prepared into 10wt .% mica slurry.

[0034] (2) Preparation of mixed oxide-coated mica pearlescent pigments: Ce(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O, citric acid, acrylamide, and glucose weighed 1.155g, 0.340g, 2.18g, 0.98g, and 4g respectively according to a certain stoichiometric ratio, dissolved in an appropriate amount of deionized water, then dropped into 3ml of acetylacetone, and mixed with mica slurry to prepare 100ml suspension. Stir the suspension magnetically for 40 minutes and turn it to a water bath at 75°C for heating and stirring. Mix the suspension until it becomes viscous and stop stirring. Continue to keep warm until gel i...

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Abstract

The invention discloses a doped high-infrared reflection rare-earth sesquisulfide gamma-Ce2S3 coated mica pearlescent pigment and a preparation method thereof. The preparation method comprises the following steps: preparing a mixed oxide coated mica pearlescent pigment with soft pearly luster by a sol-gel process; uniformly mixing the mixed oxide / mica pearlescent pigment with appropriate additive; and performing high-temperature sulfurizing reduction to obtain a doped rare-earth sesquisulfide Ce(2-x)MxS3 (M=Y<3+> or Nd<3+>) coated mica pearlescent pigment. The hue and tinting strength of the doped rare-earth sulfide pearlescent pigment prepared by the method change along with the type, dosage and coating rate of the doping metal M. Moreover, the sintering degree of the composite pigment is low, and the properties such as brightness and oxidation resistance of the product are remarkably improved over pure rare-earth sulfide pigment; and meanwhile, the synthesized Ce(2-x)MxS3 (M=Y<3+> or Nd<3+>) coated mica pearlescent pigment has a high ultraviolet absorption property in an ultraviolet region and a high infrared reflection property in a near infrared region and has broad application prospects in the field of anti-ultraviolet and solar heat-reflection thermal insulation coatings.

Description

technical field [0001] The invention relates to a doped rare earth sesquisulfide Ce 2-x m x S 3 (M=Y 3+ ,Nd 3+ ) coated mica pearlescent pigment and a preparation method thereof, belonging to the field of preparation of green micro-nano composite inorganic pigments. Background technique [0002] Mica is a special sheet silicate mineral. Its crystal structure is a layered structure composed of two layers of silicon-oxygen tetrahedron sandwiching a layer of aluminum-oxygen octahedron. Because it has excellent properties such as high temperature resistance, insulation, acid resistance, alkali chemical corrosion resistance, and organic solvent resistance, it is non-flammable, non-conductive, and harmless to the human body. Its brilliant pearlescent effect and gorgeous pearlescent effect are widely used in coatings, cosmetics, inks, ceramics and other industries, and become the most popular and promising new non-metallic decorative pigments in modern times. Pearlescent pigm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/06
CPCC01P2006/22C01P2006/37C09C1/0015C09C3/063C09C2200/102C09C2200/401C09C2210/10C09C2210/20
Inventor 叶明泉张树婷韩爱军陈昕臧垚杨瑞陈顺禄
Owner NANJING UNIV OF SCI & TECH
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