Selective absorbing coating of vacuum tube heat collecting tube
The utility model relates to a selective absorbing coating of a vacuum tube heat collecting tube. A bottom layer comprises a thermal-spraying aluminum-titanium alloy coating and an Al-Cu-Mg alloy specular reflection film from inside to outside in sequence, a middle layer comprises a chromium carbide...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model relates to a selective absorbing coating of a vacuum tube heat collecting tube. A bottom layer comprises a thermal-spraying aluminum-titanium alloy coating and an Al-Cu-Mg alloy specular reflection film from inside to outside in sequence, a middle layer comprises a chromium carbide coating and an aluminum oxide interference absorbing film from inside to outside in sequence, and an outer layer is an Al-N-C antireflection film. A silica sol layer is arranged between the Al-Cu-Mg alloy specular reflection film and the chromium carbide coating, the outer surface of the aluminum oxide interference absorbing film is coated with a black iron powder layer, and the outer surface of the Al-N-C antireflection film is coated with a siloxane resin protection layer. The design of the layers is reasonable, compound of the materials is achieved through the modern matured technology, the materials of various types are combined to be applied, compared with the ordinary simple coating type design, multiple lay |
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