The substance is actually a transparent ceramic composed of aluminum, oxygen and nitrogen (aluminum oxynitride). It is marketed under the name ALON™ and described in U.S. Patent 4,520,116. La Monica says it takes half as much ALON to stop a .30 caliber armor piercing round as it does glass. When formed and polished as a window, the material costs $10 to $15 per square inch, about 3 times that of glass.
Aquí tienes más información
tacticalip.com/2010/09/13/transparent-aluminum/
The substance is actually a transparent ceramic composed of aluminum, oxygen and nitrogen (aluminum oxynitride). It is marketed under the name ALON™ and described in U.S. Patent 4,520,116. La Monica says it takes half as much ALON to stop a .30 caliber armor piercing round as it does glass. When formed and polished as a window, the material costs $10 to $15 per square inch, about 3 times that of glass.