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A method for preparing a blackened thermal control film layer with high absorption rate and high emissivity on the surface of red copper

A high emissivity, thermal control film technology, applied in coating, liquid chemical plating, metal material coating process, etc., can solve the harsh reaction conditions of blackened thermal control film layer, poor matrix bonding force, difficult to control accurately and other problems, to achieve the effect of overcoming energy waste and difficulty in precise control, low heating temperature and cost saving

Active Publication Date: 2018-07-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems that the blackened thermal control film prepared by the existing method has harsh reaction conditions, is difficult to control accurately, the prepared film is easy to fall off, and has poor bonding force with the substrate, and provides a Method for preparing blackened thermal control film layer with high absorption rate and high emissivity

Method used

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  • A method for preparing a blackened thermal control film layer with high absorption rate and high emissivity on the surface of red copper
  • A method for preparing a blackened thermal control film layer with high absorption rate and high emissivity on the surface of red copper
  • A method for preparing a blackened thermal control film layer with high absorption rate and high emissivity on the surface of red copper

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specific Embodiment approach 1

[0051] Embodiment 1: This embodiment is a method for preparing a blackened thermal control film with high absorptivity and high emissivity on the surface of copper, which is completed in the following steps:

[0052] 1. Pretreatment of copper:

[0053] ①. Use 240#SiC sandpaper, 1000#SiC sandpaper and 1500#SiC sandpaper in sequence to polish the copper to obtain a bright copper sample;

[0054] ②, degreasing, pickling:

[0055] Immerse bright copper in NaOH and NaOH 2 CO 3 Put in the mixed solution for 15min~20min, then use distilled water to wash 3~5 times, then immerse in the pickling solution for 1min~2min, then use distilled water to wash 3~5 times, and then use a hair dryer to dry to obtain the pretreated Copper;

[0056] NaOH and NaOH and Na mentioned in step ② 2 CO 3 The mixture consists of NaOH, Na 2 CO 3 Prepared by mixing with water; the NaOH and Na 2 CO 3 The mass fraction of NaOH in the mixed solution is 10% to 25%, and the NaOH 2 CO 3 The mass fraction ...

specific Embodiment approach 2

[0085] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 2, the pretreated red copper obtained in step 1 ② is immersed in a deposition solution with a temperature of 40°C, The deposition reaction was carried out for 30 minutes to obtain red copper with a blackened thermal control film layer deposited on the surface. Others are the same as the first embodiment.

specific Embodiment approach 3

[0086] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step two, the pretreated red copper obtained in step one (2) is immersed in the deposition solution with a temperature of 60°C, and then the temperature is The deposition reaction was carried out at 60° C. for 30 minutes to obtain red copper with a blackened thermal control film deposited on the surface. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a blackening thermal control coating with high absorptivity and high emissivity on the surface of red copper, and relates to a method for preparing a thermal control coating, aiming at solving the problems of blackening thermal control coatings prepared by adopting existing methods that reaction conditions are strict, accurate control is hard to realize, and the prepared coating is easy to fall off and poor in bonding force with a matrix. The method comprises the following steps: 1. preparation of red copper; 2. preparation of a thermal control coating by adopting a solution precipitation method; 3. preparation of SnO2 sol; 4. preparation of TiO2 sol; 5. rotary coating of the coating sol; and 6. heating to obtain the blackening thermal control coating with high absorptivity and high emissivity. The blackening thermal control coating with high absorptivity and high emissivity, prepared by adopting the method disclosed by the invention, has sun absorptivity Alpha of greater than 0.97 and emissivity Epsilon of greater than 0.92. According to the invention, a method for preparing a blackening thermal control coating with high absorptivity and high emissivity on the surface of red copper can be obtained.

Description

technical field [0001] The invention relates to a method for preparing a thermal control film layer. Background technique [0002] Thermal control coating, also known as temperature control coating, is an important material used in the thermal control system of space vehicles. A type of coating whose surface reaches thermal equilibrium. It can pass its own thermal physical properties, namely the solar absorptivity (α s ) and emissivity (ε) to adjust and control the surface temperature of the spacecraft. [0003] The solar absorptivity determines the temperature absorptivity capability. When the ambient temperature of the spacecraft is too high, in order to ensure the normal operation of the instrument at high temperature, the instrument temperature must be controlled within a stable range. High absorption rate (α s ) and emissivity (ε) thermal control coating can increase the removal of waste heat from the operation of the instrument and the overall waste heat of the sat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/63C23C18/12
CPCC23C18/1216C23C18/1225C23C18/1241C23C18/1254C23C22/63
Inventor 姚忠平李东琦王建康夏琦兴魏晗姜兆华
Owner HARBIN INST OF TECH
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