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Solar spectrum total reflection type antistatic thermal control coating and preparation method thereof

A thermal control coating, solar spectrum technology, applied in reflective/signal coatings, coatings, conductive coatings, etc., can solve the problems of large surface potential difference, poor space environment irradiation stability, low solar heat flow reflectivity, etc. The effect of low, excellent radiation stability in space environment, and simple preparation process

Active Publication Date: 2021-11-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at providing a solar spectrum total reflection type based on the principle of spectral design and energy band regulation, aiming at the deficiencies such as low solar heat flow reflectivity, large surface potential difference, and poor space environment radiation stability of the current active thermal control white paint. Antistatic thermal control white paint and preparation method thereof, in order to simultaneously obtain a thermal control coating with high solar heat flux reflectivity and antistatic properties, which can be applied to surface thermal protection and industrial passive radiation refrigeration of various spacecraft serving in extreme space environments and other fields

Method used

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  • Solar spectrum total reflection type antistatic thermal control coating and preparation method thereof
  • Solar spectrum total reflection type antistatic thermal control coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] (1) In terms of mass percentage, weigh 40% ultra-wide bandgap Ga 2 o 3 Powder pigment, the particle size distribution of the pigment is controlled at 100~800nm ​​by ball milling; the Ga 2 o 3 Powder pigments are of analytical purity and above.

[0028] (2) Weigh 40% potassium silicate binder and add 10% distilled water to dilute. The preparation method of potassium silicate binder is as follows: add analytically pure potassium hydroxide and silicon micropowder powder in a molar ratio of 3, add 5% distilled water to mix and disperse, put them in a hydrothermal reaction kettle and stand at 180°C for 100 hours to prepare.

[0029] (3) Evenly pour the gallium oxide powder pigment ground and dried in step (1) into the potassium silicate binder solution, add 5% distilled water to stir and disperse, control the speed at 1000r / min, and stir for 4 hours;

[0030] (4) Weigh 5% of functional additives and add them to the solution described in step (3) and fully disperse and mi...

Embodiment 2

[0033] (1) In terms of mass percentage, weigh 30% of ultra-wide bandgap Ga 2 o 3 Powder pigment, the particle size distribution of the pigment is controlled at 100~800nm ​​by ball milling; the Ga 2 o 3Powder pigments are of analytical purity and above.

[0034] (2) Weigh 50% lithium water glass binder and add 8% distilled water to dilute. Lithium water glass binder is prepared by mixing and dispersing analytically pure lithium hydroxide and silicon micropowder powder with 4% distilled water at a molar ratio of 2.5, putting them in a hydrothermal reactor and standing at 180°C for 100 hours.

[0035] (3) Evenly pour the gallium oxide powder pigment ground and dried in step (1) into the lithium water glass binder solution, add 4% distilled water to stir and disperse, the speed is controlled at 1000r / min, and the stirring time is 4h;

[0036] (4) Weigh 8% of functional additives and add them to the solution described in step (3) and fully disperse and mix. The auxiliary agent...

Embodiment 3

[0039] (1) In terms of mass percentage, weigh 50% ultra-wide bandgap MgO powder pigment, and control the particle size distribution of the pigment to 100-800nm ​​by ball milling; the MgO powder pigment is of analytical purity or above.

[0040] (2) Weigh 40% potassium silicate binder and add 2% distilled water to dilute. Potassium silicate binder is prepared by mixing and dispersing analytically pure potassium hydroxide and silicon micropowder powder with 2% distilled water at a molar ratio of 4, putting them in a hydrothermal reactor and standing at 180°C for 100 hours.

[0041] (3) Pour the ground and dried MgO powder pigment in step (1) evenly into the potassium silicate binder solution, add 3% distilled water to stir and disperse, control the speed at 800r / min, and stir for 4 hours;

[0042] (4) Weigh 5% of functional additives and add them to the solution described in step (3) and fully disperse and mix. The auxiliary agent is 2% aluminum phosphate and 3% calcium fluorid...

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Abstract

The invention discloses a solar spectrum total reflection type antistatic thermal control coating and a preparation method thereof, and belongs to the field of new materials. The thermal control coating material mainly comprises an ultra-wide band gap oxide pigment, an inorganic water glass binder and a functional auxiliary agent; the coating of the ultra-wide band gap oxide pigment has excellent particle radiation protection stability; and the prepared coating is a water-based environment-friendly coating, can be subjected to air spraying, brush coating or blade coating and has the room temperature curing characteristic. The solar absorptivity of the coating is as low as 0.08-0.09, the emissivity is 0.88-0.92, the surface resistivity is 105-107 ohm m, and the coating can be applied to thermal control systems of various spacecrafts serving under the synergistic effect of complex and severe environments such as space high solar heat flow, strong particle radiation, ionized layer charging and discharging and atomic oxygen environment.

Description

technical field [0001] The invention relates to a solar spectrum total reflection type antistatic thermal control coating and a preparation method thereof, belonging to the field of new materials. Background technique [0002] The thermal control coating is an important part of the thermal control subsystem of the spacecraft. It is coated on the outer surface of the spacecraft. Through its own thermophysical characteristics, the solar absorption ratio (a s ) and hemispherical emissivity (e H ) to adjust the surface thermal equilibrium temperature of the spacecraft (T s ), namely T s ∝(a s / e H ) 1 / 4 , so as to achieve the purpose of thermal control. ZnO-based thermal control coating is widely used in thermal control systems of various types of spacecraft at home and abroad because of its low absorption, high emission performance and good process characteristics. For example, domestic S781 white paint, KSZ white paint, ACR white paint, and American AZ Technology's Z-93...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/02C09D5/33C09D5/24C09D7/61
CPCC09D1/02C09D5/004C09D5/24C09D7/61
Inventor 吕金鹏文相宇陈卓
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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