Greenhouse window for solar heat absorbing systems derived from

Details Greenhouse window for solar heat absorbing systems derived from Greenhouse window for solar heat absorbing systems derived from

1975-05-27

1976-10-26

O'Dea, William F.

Stoves and furnaces

Heaters

Surface

350 1, 427168, F24J 302

Patent

active

039877817

ABSTRACT:
Cadmium stannate has been found to be useful as a window for solar heat absorbing systems in which advantage is taken of the unique optical properties of cadmium stannate. When cadmium stannate is in an electrically conductive state, having a conductivity of greater than 10.sup.3 ohm.sup..sup.-1 cm.sup..sup.-1, it becomes transparent to solar radiation and reflective of thermal infrared radiation. This enables the cadmium stannate to function as a window which allows passage of solar radiation through it and incident onto a black body, and at the same time serve as a reflector of thermal infrared radiation emitted from said body. This results in more efficient solar heat transfer to the solar heat collector provided with such a window.

REFERENCES:
patent: 1946184 (1934-02-01), Abbot
patent: 3811953 (1974-05-01), Nozik
A. J. Nozik, Physical Review: vol. 6, No. 2, July 1972 Optical and Electrical Properties of Cd.sub.2 SnO.sub.4 : A Defect Semiconductor.

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