Lithium containing glass with high and low oxidized iron content, and products using same

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United States of America Patent

PATENT NO 10202302
APP PUB NO 20150246842A1
SERIAL NO

14712381

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A low infrared absorbing lithium glass includes FeO in the range of 0.0005-0.015 wt. %, more preferably 0.001-0.010 wt. %, and a redox ratio in the range of 0.005-0.15, more preferably in the range of 0.005-0.10. The glass can be chemically tempered and used to provide a ballistic viewing cover for night vision goggles or scope. A method is provided to change a glass making process from making a high infrared absorbing lithium glass having FeO in the range of 0.02 to 0.04 wt. % and a redox ratio in the range of 0.2 to 0.4 to the low infrared absorbing lithium glass by adding additional oxidizers to the batch materials. A second method is provided to change a glass making process from making a low infrared absorbing lithium glass to the high infrared absorbing lithium glass by adding additional reducers to the batch material. In one embodiment of the invention the oxidizer is CeO2. An embodiment of the invention covers a glass made according to the method.

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Patent Owner(s)

Patent OwnerAddress
PPG INDUSTRIES OHIO INC3800 WEST 143RD STREET CLEVELAND OH 44111

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arbab, Mehran Pittsburgh, US 65 1650
Blevins, Calvin B Huntsville, US 3 17
Goodwin, George B Cranberry Township, US 28 995
Harris, Caroline S Pittsburgh, US 48 888
Hartmann, James V Huntsville, US 2 7
Shelestak, Larry J Bairdford, US 63 1669

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