Solar heat absorbers comprising alternate layers of metal and dielectric material

• US 3,272,986 A
• Filed: 09/27/1963
• Issued: 09/13/1966
• Est. Priority Date: 09/27/1963
• Status: Expired due to Term

• Current Assignee: Roger N. Schmidt
• Original Assignee: Roger N. Schmidt
• Inventors: Schmidt, Roger N.
• Application Number:
  US04/312,034
• Time in Patent Office: 1,082 Days
• US Class Current: 136/206
• CPC Class Codes: F24S 70/225 for spectrally selective absorption
• CPC Class Codes: F24S 70/25 Coatings made of metallic material
• CPC Class Codes: F24S 70/30 Auxiliary coatings, e.g. anti-reflective coatings
• CPC Class Codes: Y02E 10/40 Solar thermal energy, e.g. solar towers
• CPC Class Codes: Y10S 126/908 Particular chemical
• CPC Class Codes: Y10T 428/12611 Oxide-containing component
• CPC Class Codes: Y10T 428/12833 Alternative to or next to each other

Claims

4. A SOLAR HEAT ABSORBER EXHIBITING HIGH ABSORPTION IN THE SOLAR SPECTRAL REGION AND LOW EMISSIVITY IN THE INFRARED REGION COMPRISING:

AN OPAQUE MOLYBDENUM SUBSTRATE;

AND AT LEAST ONE DIELECTRIC FILM AND MOLYBDENUM FILM RESPECTIVELY PLACED THEREON IN LAMINAR RELATIONSHIP TO PROVIDE A SURFACE ADAPTED TO BE EXPOSED TO SOLAR RADIATION, SAID DIELECTRIC RANGING FROM 1/4$ AT 0.2 MICRON TO ABOUT 1/4$ AT 0.5 MICRON IN OPTICAL THICKNESS, SAID MOLYBDENUM FILM RANGING FROM ABOUT 500 OHMS/SQUARE TO ABOUT 2000 OHMS/SQUARE IN RESISTIVITY.