Pigment, preparation method, thermal control coating containing pigment and preparation method

A thermal control coating and pigment technology, applied in coating, reflective/signal coating, etc., can solve problems such as low reflectivity, difficult to meet, insufficient MgO reflectivity, etc., achieve dense paint film, good bonding force, and solve the appearance rough effect

Active Publication Date: 2021-06-15
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The absorption of the coating in the ultraviolet band is largely caused by fillers. The fillers of the widely used white thermal control coatings are ZnO and MgO. Among them, ZnO has a higher reflectivity in the infrared band and a lower reflectivity in the ultraviolet band. MgO has insufficient reflectivity in the near-infrared band, and the above two types of products are difficult to meet the needs of the new generation of satellite thermal control technology for coatings with low solar absorption ratio

Method used

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  • Pigment, preparation method, thermal control coating containing pigment and preparation method
  • Pigment, preparation method, thermal control coating containing pigment and preparation method

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preparation example Construction

[0039] The preparation method of described a kind of pigment is characterized in that, comprises the following steps:

[0040] (1) hot injection of the mixed solution of magnesium sulfate and zinc sulfate in the sodium silicate solution, react;

[0041] (2) separating the reaction product in the mixed solution in step (1) from the solution, cleaning and drying;

[0042] (3) Sintering the product obtained in step (2) to obtain MgZnO / SiO 2 Core-shell nanostructure composite powder.

[0043] Further, in step (1), the concentration of the mixed solution of magnesium sulfate and zinc sulfate is 0.25~0.5mol / L, and the molar ratio of magnesium sulfate and zinc sulfate is 1~1.2:9; The concentration of sodium silicate solution is 1.0~ 1.5mol / L.

[0044] Further, in step (1), the mixed solution of magnesium sulfate and zinc sulfate is injected into the sodium silicate solution by hot injection at room temperature, and the speed of hot injection is 1 to 5ml / s; in step (1), The reacti...

Embodiment 1

[0057] Pigment MgZnO / SiO 2 Preparation of core-shell nanostructure composite powder-1:

[0058] (1) Prepare a mixed solution of magnesium sulfate and zinc sulfate with a molar ratio of 1:9 and a 1.0mol / L sodium silicate solution as a precursor solution. The concentration of the mixed solution of sulfate is 0.5mol / L. The salt mixed solution is injected into the sodium silicate solution; the solvent is deionized water; the speed of hot injection is 1-5ml / s; in the step (1), the reaction time is 10-20min.

[0059] (2) After the hot injection reaction, aging and centrifugation were carried out, and the mixed solution was centrifuged at 9000rpm for 6 minutes to separate the reaction product from the solution, washed 3 times with deionized water, and dried at 80°C for 24 hours;

[0060] (3) Sinter the dried product at 500°C to obtain MgZnO / SiO 2 Nanostructure composite powder-1.

[0061] Contains MgZnO / SiO 2 The preparation of thermal control coating (solar full-spectrum high re...

Embodiment 2

[0068] Pigment MgZnO / SiO 2 Preparation of core-shell nanostructure composite powder-2:

[0069] (1) Prepare a mixed solution of magnesium sulfate and zinc sulfate with a molar ratio of 1:9 and 1.0MOL / L sodium silicate solution as a precursor solution. The concentration of the mixed solution of sulfate is 0.5MOL / L. The salt mixed solution is injected into the sodium silicate solution; the solvent is deionized water; the speed of hot injection is 1-5ml / s; in step (1), the reaction time is 10-20min;

[0070] (2) After the hot injection reaction, aging and centrifugation were carried out; the mixed solution was centrifuged at 9000rpm for 6 minutes to separate the reaction product from the solution, washed 3 times with deionized water, and dried at 80°C for 24 hours;

[0071] (3) Sinter the dried product at 400°C to obtain MgZnO / SiO 2 Nanostructure composite powder-2.

[0072] Contains MgZnO / SiO 2 Preparation of thermal control coating of core-shell nanostructure composite powd...

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Abstract

The invention relates to a pigment, a preparation method, a thermal control coating containing the pigment and a preparation method. MgZnO / SiO2 core-shell nanostructure composite powder is used as the pigment, and after the pigment is mixed with inorganic silicate, a solar full-spectrum high-reflection thermal control coating is prepared. MgZnO is used as a core of the MgZnO / SiO2 core-shell composite powder, and the surface of the MgZnO / SiO2 core-shell composite powder is coated with a SiO2 shell layer, so that the high reflection of the thermal control coating in an ultraviolet band is realized, and meanwhile, the possibility is provided for improving the spatial stability of the coating. Through reasonable formula design and spraying process control, the prepared solar full-spectrum high-reflection thermal control coating is compact in paint film and good in binding force, and the engineering application technical problems that a coated product is rough in surface appearance, prone to powder falling and the like are solved. The bonding force of the thermal control coating and a non-metal base material is improved, good thermal matching of the coating and different types of base materials is achieved, the thermal control requirements of medium and low orbit long-life spacecraft model products are met, and the thermal control coating has potential application prospects in the civil field.

Description

technical field [0001] The invention belongs to the technical field of thermal control coatings, and in particular relates to a pigment, a preparation method, a thermal control coating containing the pigment and a preparation method thereof. Background technique [0002] The existing thermal control coating has a high absorption ratio in the ultraviolet band of sunlight, resulting in a relatively high overall solar absorption of the coating. At the same time, excessive ultraviolet light absorption will cause cracking and aging of the coating binder, and the solar absorption ratio will degrade at the end of the coating's life. Obviously, it leads to high temperature at the end of the product. At present, in order to control the temperature at a relatively high level, only the area of ​​the radiator can be increased, which is difficult to meet the needs of the new generation of satellites for efficient heat dissipation and weight reduction. [0003] The new generation of sate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/61C09D1/00C09D5/33
CPCC09D7/61C09D1/00C09D7/67C09D5/004
Inventor 王萌雷辉姜舟贺晨罗正平李俊峰孙理理
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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