Lithium containing glass with high oxidized iron content and specified redox ratio
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United States of America Patent
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Sep 12, 2023
Grant Date -
N/A
app pub date -
Sep 15, 2021
filing date -
Feb 24, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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 0.005-010. 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.
First Claim
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International Classification(s)
- 2021 Application Filing Year
- C03C Class
- 785 Applications Filed
- 292 Patents Issued To-Date
- 37.20 % Issued To-Date
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- C03C Class
- 0 % this patent is cited more than
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