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Preparation method of nanometer silver/antimony doped tin oxide composite transparent conductive heat reflection coating

A technology of antimony-doped tin oxide and heat-reflective coating, which is applied in the coating and other directions, can solve the problems of doping concentration limitation, difficulty in controlling the doping concentration of antimony ions, and inability to achieve uniform mixing and effective doping of nano-silver, etc., to achieve Ensures stability and prevents coagulation

Active Publication Date: 2016-08-17
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current process of preparing antimony-doped tin oxide sol, ethanol and ethylene glycol methyl ether are mostly used as solvents, and monoethanolamine, diethanolamine, acetylacetone, etc. are used as sol stabilizers. Since the hydrolysis rate of antimony ions cannot be well controlled , resulting in coagulation and precipitation of antimony ion hydrolysis condensation, the doping concentration of antimony ions is not easy to control and the doping concentration is limited; in addition, when the ethanol sol doped with antimony tin oxide is mixed with nano-silver sol, silver nanoparticles can be aggregated and precipitated, The uniform mixing of the two and the effective incorporation of nano-silver cannot be achieved

Method used

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  • Preparation method of nanometer silver/antimony doped tin oxide composite transparent conductive heat reflection coating
  • Preparation method of nanometer silver/antimony doped tin oxide composite transparent conductive heat reflection coating

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Embodiment 1

[0017] The film layer structure is glass substrate / Ag+ATO (ATO, Antimony-doped Tin Oxide, that is, antimony-doped tin oxide), and the preparation method is as follows:

[0018] (1) Prepare nano-silver sol: take silver nitrate as raw material, take ethylene glycol as reducing agent and solvent, take polyvinylpyrrolidone with molecular weight as 40000 as stabilizer, silver nitrate concentration is 0.05mol / L, stabilizer and silver nitrate The molar ratio is 4:1, and the nano-silver sol is obtained by the reaction, the reaction temperature is 120° C., and the reaction time is 1 h.

[0019] (2) Preparation of ATO sol: respectively with SbCl 3 , SnCl 2 As a raw material, use ethylene glycol as a solvent and a coordination stabilizer, add the same volume of glacial acetic acid to inhibit the hydrolysis of metal salts, and stir and react at 70°C for 2h (after testing, the temperature is 60-100°C and the time is 2-4h , have no significant impact on the invention effect), the preparat...

Embodiment 2

[0024] Referring to Example 1, the difference is that the molecular weight of the polyvinylpyrrolidone used when preparing the nano-silver sol is 20,000. The surface resistance of the prepared coating reaches 20Ω / □, the infrared starting point is at 2.5 microns, and the infrared heat reflectivity reaches 80%.

Embodiment 3

[0026] Referring to Example 1, the difference is that the molecular weight of the polyvinylpyrrolidone used when preparing the nano-silver sol is 60,000. The surface resistance of the prepared coating reaches 20Ω / □, the infrared starting point is at 2.5 microns, and the infrared heat reflectivity reaches 80%.

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Abstract

The invention provides a preparation method of a nanometer silver / antimony doped tin oxide composite transparent conductive heat reflection coating. Ethylene glycol is adopted as a solvent and a coordination stabilizer in the preparation process of antimony doped tin oxide sol, hydrolysis and condensation of antimony ions can be effectively controlled, and therefore the doping concentration of the antimony ions is effectively controlled; in addition, when the antimony doped tin oxide sol and nanometer silver sol are mixed, nanometer silver will not be coagulated, and therefore effective doping of nanometer silver is achieved. The method specially comprises the following steps that the nanometer silver sol and the antimony doped tin oxide sol are prepared at first, then mixed sol is prepared, and finally, deposition is carried out on a substrate through a spraying technology to obtain the nanometer silver / antimony doped tin oxide composite transparent conductive heat reflection coating. The surface resistance of the coating prepared through the method reaches 20 or below, the infrared heat reflection rate reaches 80% or above, and the infrared reflection initial point can be adjusted from 2.5 micrometers to 1.5 micrometers so as to be applicable to different application occasions.

Description

technical field [0001] The invention relates to the field of transparent conductive heat-reflective coatings, in particular to a method for preparing a nano-silver / antimony-doped tin oxide composite transparent conductive heat-reflective coating. Background technique [0002] Transparent conductive heat reflective coating not only has the characteristics of high transmittance and good conductivity, but also has infrared heat reflection characteristics, and has been widely used in liquid crystal displays, transparent electrodes, solar cells, energy-saving coated glass and other fields. The preparation methods of transparent conductive heat reflective coating include magnetron sputtering method, chemical vapor deposition method, spray pyrolysis method and sol-gel method and so on. Among them, the sol-gel method and the spray pyrolysis method have the advantages of low cost, simple process, no need for vacuum equipment, and easy operation. This method usually utilizes the hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/12
CPCC09D1/00C09D7/20C09D7/61C09D7/63
Inventor 徐雪青梁柱荣徐刚
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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