Composite with a low emissivity in the medium and far infrared, and with a low reflectivity in the visible and near infrared

• US 7,070,857 B2
• Filed: 12/20/2002
• Issued: 07/04/2006
• Est. Priority Date: 12/20/2001
• Status: Expired due to Fees

• Current Assignee: Alenia Aeronautica SPA (Leonardo S.p.A.), Centro Sviluppo Materiali SpA (RINA SpA)
• Original Assignee: Alenia Aeronautica SPA (Leonardo S.p.A.), Centro Sviluppo Materiali SpA (RINA SpA)
• Inventors: Mortoni, Flavio, Tului, Mario, Protti, Marco, Valle, Roberta
• Primary Examiner(s): STEIN, STEPHEN J
• Application Number:
  US10/324,125
• Publication Number:
  US 20040106002A1
• Time in Patent Office: 1,292 Days
• Field of Search: 428/615, 428/620, 428/621, 428/628, 428/629, 428/632, 428/639, 428/690, 428/369, 428/367, 428/368, 428/375, 428/446, 428/457, 428/469, 428/472, 428/688, 428/689, 428/698, 428/699, 428/701, 428/702, 427/255.28, 427/255.32, 427/255.33, 427/255.34, 427/255.35, 427/255.36, 427/255.37, 427/419.1, 427/419.2, 427/419.3
• US Class Current: 428/408
• CPC Class Codes: C23C 14/0015 characterized by the colour of the layer
• CPC Class Codes: C23C 14/024 Deposition of sublayers, e.g. to promote adhesion of the coating C23C14/027 takes precedence
• CPC Class Codes: C23C 14/08 Oxides C23C14/10 takes precedence
• CPC Class Codes: C23C 14/086 of zinc, germanium, cadmium, indium, tin, thallium or bismuth
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

Multi-layer composite product, featuring low emissivity in the mid-infrared band (as wavelength range 2,5–5 μm) and far-infrared (as wavelength range 8.0–14.0 μm) bands, as well as low reflexivity in the near-infrared (at a wavelength range of 0.7–2.5 μm) and in the visible (as wavelength range 0.3–0.7 μm) bands, including a base constructed with low-density and/or high thermal-resilience structural materials, covered with optionally doped coating, and where, between the base and the coating, at least one intermediate layer of metals or metal oxides is planned for insertion.

Claims

1. A multi-layer composite product, featuring emissivity levels lower than 0.4 in the mid-infrared, wavelength range 2,5–

5 μ

m, and far-infrared bands, wavelength range 8.0–

14.0 μ

m, as well as reflectivity lower than 0.3 in the visible, wavelength range 0.3–

0.7 μ

m, and the near-infrared bands, wavelength range 0.7–

2.5 μ

m, and featuring the inclusion of a base constructed using low-density and/or high thermal-resilience structural materials, coated with a coating,

wherein the low density and high-thermal-resilience structural material is a composite with carbon fibers, and

wherein said coating consists of an outer layer made of a material selected from the group consisting of In₂O₃ doped with tin, CdIn₂O₄, Zn₂In₂O₅, ZnO doped with aluminum, ZnO doped with tin, SnO₂ doped with antimony, SnO₂ doped with fluorine and CdO doped with tin, and an intermediate layer made of a material selected from a group consisting of indium, cadmium, zinc, tin, aluminum, antimony or their alloys, oxides of metals selected from the group consisting of indium, cadmium, tin, aluminum, titanium, tungsten, which are optionally doped with elements selected from the group consisting of tin, aluminum, antimony and fluorine.