The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 1978
Filed:
May. 06, 1977
Richard F Reade, Corning, NY (US);
Corning Glass Works, Corning, NY (US);
Abstract
This invention is directed to the production of glass-ceramic articles having compositions within the Li.sub.2 O-Al.sub.2 O.sub.3 -SiO.sub.2 field nucleated with a combination of TiO.sub.2 + ZrO.sub.2 wherein beta-spodumene solid solution constitutes the primary crystal phase. Mullite and/or corundum along with ZrTiO.sub.4 solid solution and, occasionally, ZrO.sub.2 solid solution are present as secondary crystal phases. Because of their low coefficients of thermal expansion and exceptional long time dimensional stability at temperatures up to 1000.degree. C., the compositions can be useful in applications where extreme changes in temperature are experienced; for example, the construction of honeycomb structures used in regenerative heat exhchangers for turbine engines.