Composite article and method
First Claim
1. A composite article comprising a solid glass body and a supporting network structure, the network structure being a plurality of struts composed of sintered and crystallized glass powder and being frit sealed to one another and to the glass body, characterized in that a glass filler in particulate form is dispersed within the sintered struts to provide an average expansion mismatch between the struts and the glass body that does not exceed about 0.15 ppm/°
- C. over the temperature range of -50°
to +50°
C.
1 Assignment
0 Petitions
Accused Products
Abstract
A composite article, such as a telescope mirror blank, comprising a solid glass body and a supporting network structure, the structure being composed of a network of interlocking struts frit sealed to one another and to the face plate. The article is characterized in that sufficient of the glass body is incorporated in particulate form in the struts to maintain an average expansion mismatch (-50° C. to +50° C.) between the network structure and the glass body of no more than 0.15 ppm/°C.
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Citations
28 Claims
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1. A composite article comprising a solid glass body and a supporting network structure, the network structure being a plurality of struts composed of sintered and crystallized glass powder and being frit sealed to one another and to the glass body, characterized in that a glass filler in particulate form is dispersed within the sintered struts to provide an average expansion mismatch between the struts and the glass body that does not exceed about 0.15 ppm/°
- C. over the temperature range of -50°
to +50°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- C. over the temperature range of -50°
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15. A method of producing a composite article comprising a solid glass body and a supporting network structure, the network structure being composed of a plurality of struts composed of sinterable and crystallizable glass powder and being frit sealed to one another and to the glass body, characterized by forming the struts from a slurry of sinterable, thermally crystallizable glass powder containing dispersed therein particles of the glass body in an amount sufficient to provide an average expansion mismatch between the network structure and the glass body that is no greater than 0.15 ppm/°
- C. over the temperature range of -50°
to +50°
C. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- C. over the temperature range of -50°
Specification