Transparent glass-ceramic armor

Details Transparent glass-ceramic armor Transparent glass-ceramic armor

2011-01-25

2011-01-25

Group, Karl E (Department: 1731)

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

C501S005000, C501S007000, C501S010000, C089S036020

Reexamination Certificate

active

07875565

ABSTRACT:
The invention is directed to transparent glass-ceramic materials for use in transparent armor systems. Applications include armor systems for ground vehicles and aircraft as well as personal protective equipment. The glass-ceramic materials according to the invention exhibit a ballistic limit vs. areal density line slope of 1.0 or greater, preferably 1.1 or greater and more preferably 1.2 or greater. The crystalline phase of the glass ceramic materials may include β-quartz, spinel, spinel solid solutions, mullite and phases known in the art to be transparent.

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