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A near-infrared high-reflectivity functional ceramic pigment and preparation method thereof

A high-reflectivity, functional ceramic technology, applied in chemical instruments and methods, preparation/processing of rare earth metal compounds, fibrous fillers, etc., can solve problems such as aging, staining, fading and falling off, and achieve simple process, near High infrared reflectivity, which is conducive to the effect of industrial application

Active Publication Date: 2021-03-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an exterior wall material, paint is prone to problems such as staining, aging, fading and falling off with the prolongation of sunlight.

Method used

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  • A near-infrared high-reflectivity functional ceramic pigment and preparation method thereof
  • A near-infrared high-reflectivity functional ceramic pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of near-infrared high-reflectivity functional ceramic pigments specifically includes the following process steps:

[0033] (1) Prepare 180 ml of water / alcohol solution ( V 水 : V 乙醇 = 1 : 5), add 10 ml of glacial acetic acid, mix well, then add 0.1 mole of tetraethyl orthosilicate, stir for 8 minutes, then add 0.35 mole of citric acid as a chelating agent, and use magnetic stirring at the same time to form a transparent sol;

[0034] (2) According to the chemical composition Nd 2 Ti 0.3 Si 1.7 o 7 Weigh butyl titanate and neodymium nitrate, add butyl titanate directly to the transparent sol in step (1), and at the same time fully dissolve neodymium nitrate in 50 ml of deionized water, add it to the transparent sol, and stir for 1 hour . The sol was then moved to a water bath at 90° C. and stirred for 1 hour, and then stirred continuously in an oil bath at 130° C. for 2 hours to obtain a xerogel.

[0035] (3) The dry gel was heat-treated at 1200°...

Embodiment 2

[0039] The preparation of near-infrared high-reflectivity functional ceramic pigments specifically includes the following process steps:

[0040] (1) Prepare 180 ml of water / alcohol solution ( V 水 : V 乙醇 = 1 : 3), add 10 ml of glacial acetic acid, mix well, then add 0.1 mole of sodium silicate, stir for 5 minutes, then add 0.5 mole of citric acid as a chelating agent, and use magnetic stirring at the same time to form a transparent sol;

[0041] (2) According to the chemical composition Nd 2 Ti 0.05 Si 1.95 o 7 Weigh titanium tetrachloride and neodymium sulfate, add titanium tetrachloride directly into the transparent sol in step (1), at the same time fully dissolve neodymium sulfate in 50 ml of deionized water, add it to the transparent sol, and stir for 2 hours . The sol was then moved to a water bath at 80° C. and stirred for 1 hour, and then stirred continuously in an oil bath at 120° C. for 1.5 hours to obtain a xerogel.

[0042] (3) The dry gel was heat-treated...

Embodiment 3

[0046] The preparation of near-infrared high-reflectivity functional ceramic pigments specifically includes the following process steps:

[0047] (1) Prepare 180 ml of water / alcohol solution ( V 水 : V 乙醇 = 1 : 4), add 15 ml of glacial acetic acid, mix well, then add 0.1 mol of sodium silicate, stir for 5 minutes, then add 0.4 mol of citric acid as a chelating agent, and use magnetic stirring at the same time to form a transparent sol;

[0048] (2) According to the chemical composition Nd 2 Ti 0.75 Si 1.25 o 7 Weigh titanium tetrachloride and neodymium chloride, add titanium tetrachloride directly to the transparent sol in step (1), and at the same time fully dissolve neodymium chloride in 50 ml of deionized water, add it to the transparent sol, and stir thoroughly 1 hour. Then the sol was moved to a water bath at 85° C. and stirred for 1 hour, and then stirred continuously in an oil bath at 140° C. for 1 hour to obtain a xerogel.

[0049] (3) The dry gel was heat-tre...

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Abstract

The invention discloses functional ceramic pigment with high near-infrared reflectivity and a preparation method thereof. The functional ceramic pigment is prepared from the following raw materials: soluble neodymium salt, a soluble titanium source and a soluble silicon source, and the chemical composition of the near-infrared high-reflectivity functional ceramic pigment is Nd2TixSi2-xO7, whereinx is greater than or equal to 0.05 and is smaller than 0.8. The preparation method of the functional ceramic pigment is characterized by taking citric acid as a chelating agent, and adopting a sol-gelbinding combustion method, thus obtaining the functional ceramic pigment with the high near-infrared reflectivity. The functional ceramic pigment disclosed by the invention has the high near-infraredreflectivity and has a color-changing decoration effect, and the composition contains no toxic elements; the preparation method is simple in technology, complicated equipment is not required, and industrial application is facilitated.

Description

technical field [0001] The invention relates to the technical field of ceramic pigments, in particular to a near-infrared high-reflectivity functional ceramic pigment and a preparation method thereof. Background technique [0002] Near-infrared building energy-saving materials have high heat reflectivity and low absorption rate to sunlight, which can reduce the absorption of sunlight, thereby reducing the temperature of buildings and achieving the purpose of saving energy and reducing consumption. According to reports, after using near-infrared energy-saving materials in buildings, compared with before use, the surface temperature of the building can be reduced by 5-10°C, the internal temperature can be reduced by 2-4°C, and the cooling energy consumption can be reduced by 10-20%. At present, near-infrared energy-saving coatings are widely used on the exterior walls of buildings. For coatings, most of the organic resins are transparent, so the composition, microstructure an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/622C04B35/626C01F17/32C01F17/10C09C1/00
CPCC04B35/50C04B35/622C04B35/626C04B2235/656C04B2235/6567C04B2235/9661C09C1/0009C01F17/32
Inventor 柯善军潘志东王燕民
Owner SOUTH CHINA UNIV OF TECH
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