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Synthesis of cobalt aluminum spinel blue nano ceramic pigment and application in preparation of solar energy light-absorbing coating

A spinel-type, nano-ceramic technology, used in fibrous fillers, radiation-absorbing coatings, etc., can solve the problems of poor moisture resistance of coatings, good temperature resistance of coatings, and high cost, and achieves lower crystallization temperature, The effect of improving production conditions and reducing production costs

Inactive Publication Date: 2017-06-13
STATE GRID HUNAN ELECTRIC COMPANY DISASTER PREVENTION & REDUCTION CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each of the above-mentioned solar coating preparation technologies has its own advantages and disadvantages: the performance of the coating prepared by magnetron sputtering technology is better, but it needs to use special metals in the high temperature field, and the cost is high; the coating prepared by electrochemical method The high temperature resistance of the coating is not very ideal; the coating prepared by the sol-gel method has good temperature resistance, but the organic matter needs to be ablated during the production process, and the adhesion of the coating is not ideal; the coating prepared by the electroplating method is resistant to moisture The performance is poor; the coating prepared by the chemical conversion method has better temperature resistance, but the emissivity is higher
In addition, the coating prepared by this method is a single black color, which is not beautiful and lacks decoration, and it is impossible to realize the color coordination between the solar absorbing coating and the building, thereby affecting the appearance of the solar absorbing coating in outdoor architectural applications sex

Method used

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  • Synthesis of cobalt aluminum spinel blue nano ceramic pigment and application in preparation of solar energy light-absorbing coating
  • Synthesis of cobalt aluminum spinel blue nano ceramic pigment and application in preparation of solar energy light-absorbing coating
  • Synthesis of cobalt aluminum spinel blue nano ceramic pigment and application in preparation of solar energy light-absorbing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) CoAl 2 o 4 Synthesis of spinel-type blue nano-ceramic pigments

[0033] Add 0.2 mol of cobalt nitrate hexahydrate and 0.4 mol of aluminum nitrate nonahydrate into 400 ml of water respectively, stir magnetically at room temperature, and obtain the initial A solution after the metal salt is completely dissolved. Add 0.6 mol citric acid and 0.6 mol polyethylene glycol 400 into 200 ml of water, and obtain solution B after complete dissolution; slowly add solution B to the initial solution A, stir and heat to 35~40 °C to obtain Sol-gel precursor; adjust the sol-gel precursor to a pH value of 6~7 with 0.1 mol / L ammonia water under stirring; continue stirring at 35~40°C to make it hydrolyze to form a sol solution; Evaporate the solvent of the sol solution at 120~130 ℃ to obtain the xerogel; use a few drops of absolute ethanol to ignite the xerogel in the air, so that the xerogel will form a gray self-propagating powder through self-propagating combustion; finally The gr...

Embodiment 2

[0039] (1) CoAl 2 o 4 Synthesis of spinel-type blue nano-ceramic pigments

[0040] Add 0.1 mol cobalt chloride hexahydrate and 0.2 mol aluminum chloride to 200 ml water respectively, stir magnetically at room temperature, and obtain the initial A solution after the metal salt is completely dissolved; add 0.4 mol ethylenediaminetetraacetic acid and 0.6 mol Add polyethylene glycol 400 into 200 ml of water, and obtain solution B after complete dissolution; then slowly add solution B to the initial solution A, stir and heat to 35-40 °C to obtain a sol-gel precursor; Under stirring, use 0.1 mol / L ammonia water to adjust the sol-gel precursor to a pH value of 6~7; continue stirring at 35~40 °C to make it hydrolyze to form a sol solution; put the sol solution at 120~130 °C Evaporate the solvent under certain conditions to obtain the xerogel; use a few drops of absolute ethanol to ignite the xerogel in the air, so that the xerogel will form a dark gray self-propagating powder throug...

Embodiment 3

[0044] (1) CoAl 2 o 4 Synthesis of spinel-type blue nano-ceramic pigments

[0045] Add 0.1 mol of cobalt sulfate heptahydrate and 0.2 mol of ammonium aluminum sulfate dodecahydrate to 700 ml of water respectively, stir magnetically at room temperature, and obtain the starting A solution after the metal salt is completely dissolved. Add 0.4 mol citric acid and 0.4 mol polyethylene glycol 400 into 200 ml of water, and obtain solution B after complete dissolution; slowly add solution B to the initial solution A, stir and heat to 35~40 °C to obtain Sol-gel precursor; adjust the sol-gel precursor to a pH value of 6~7 with 0.1 mol / L ammonia water under stirring; continue stirring at 35~40°C to make it hydrolyze to form a sol solution; Evaporate the solvent of the sol solution at 120~130 ℃ to obtain the xerogel; use a few drops of absolute ethanol to ignite the xerogel in the air, so that the xerogel will form a gray self-propagating powder through self-propagating combustion; fina...

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Abstract

The invention discloses synthesis of a CoAl2O4 spinel blue ceramic pigment, a transition metal cobalt salt and a metal aluminum salt are dissolved in distilled water to obtain a starting solution; a chelating agent and esterification agent mixed water solution is dripped into the starting solution, and a sol-gel precursor is obtained by stirring and heating; the pH of the sol-gel precursor is adjusted to 6-7, the sol-gel precursor is hydrolyzed by continuous stirring and heating to form a sol solution; a solvent in the sol solution is evaporated to obtain a dry gel, the dry gel is ignited by absolute ethanol, by full self-propagating combustion of the dry gel, a combustion product is obtained, and the CoAl2O4 spinel blue ceramic pigment is obtained by heat treatment of the combustion product at 400 to 800 DEG C. The blue ceramic pigment, an organic binder and an organic solvent are mixed and sprayed onto a metal substrate after ball milling dispersion to obtain a CoAl2O4 spinel blue ceramic solar energy light-absorbing coating, and application of a colorful absorbing coating in solar energy outdoor buildings can be realized.

Description

technical field [0001] The present invention relates to a CoAl 2 o 4 A method for synthesizing spinel-type blue ceramic pigments, in particular to a sol-gel self-propagating combustion method for synthesizing CoAl 2 o 4 The method of spinel type blue ceramic pigment, the present invention also relates to this CoAl 2 o 4 The application of the spinel blue ceramic pigment in the preparation of the blue solar light absorbing coating belongs to the preparation of the spinel compound and its application in the field of solar photothermal conversion. Background technique [0002] Energy crisis and environmental pollution have become important factors affecting economic and social development, and whether to obtain pollution-free energy has become one of the focuses of today's society. As an inexhaustible clean energy source, solar energy has been paid more and more attention. Therefore, various new materials, new designs, and new technologies that utilize solar energy have b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/622C04B35/624C04B35/64C09D5/32C09C1/00
CPCC04B35/44C04B35/622C04B35/624C04B35/64C04B2235/66C09C1/0009C09D5/32
Inventor 刘刚马鹏军周添红高祥虎耿庆芬
Owner STATE GRID HUNAN ELECTRIC COMPANY DISASTER PREVENTION & REDUCTION CENT
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