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Solar reflecting mirror having a protective coating and method of making same




Title: Solar reflecting mirror having a protective coating and method of making same.
Abstract: A solar reflecting mirror includes a shaped glass substrate having a focal area, a reflective coating over its convex surface and a sodium ion barrier layer over its concave surface. The shaped substrate has a strain pattern having a radial tension strain at the bottom area, and circumferential compression strain at the periphery of the substrate. As the distance from the periphery of the shaped substrate increases, the circumferential compression strain decreases to a “transition line” where circumferential tension strain begins. As the distance from the transition line in a direction toward the bottom area of the glass substrate increases, the circumferential tension increases. To compensate for the strain pattern in the shaped glass substrate to avoid buckling of, and surface cracks of, the barrier layer, the barrier layer including an oxide of silicon and aluminum thickness, among other things is varied on. A method of making the solar mirror from shaped sections is also discussed. ...


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USPTO Applicaton #: #20100242953
Inventors: Abhinav Bhandari, Harry Buhay, William R. Siskos, James P. Thiel


The Patent Description & Claims data below is from USPTO Patent Application 20100242953, Solar reflecting mirror having a protective coating and method of making same.




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stats Patent Info
Application #
US 20100242953 A1
Publish Date
09/30/2010
Document #
12709045
File Date
02/19/2010
USPTO Class
126684
Other USPTO Classes
29592
International Class
24J2/10
Drawings
11


Reflective Coating

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20100930|20100242953|solar reflecting mirror having a protective coating and making same|A solar reflecting mirror includes a shaped glass substrate having a focal area, a reflective coating over its convex surface and a sodium ion barrier layer over its concave surface. The shaped substrate has a strain pattern having a radial tension strain at the bottom area, and circumferential compression strain |Ppg-Industries-Ohio-Inc
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