US4942144A
Expired / Lapsed
US
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Infrared transmitting glasses with high glass transition temperatures
Assignee: Iowa State University Research Foundation Inc
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Filing: 1989-01-23
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Granted: 1990-07-17
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Expires: 2009-01-23
Abstract
Abstract A chalcogenide glass capable of infrared transmission which is either sulfur, selenium or tellurium based and consists of compositions of the formula MX+M 2 'X 3 +SiX 2 , wherein M is one of the metals calcium, strontium, barium, zinc and lead, and M' is either aluminum or gallium and X is either sulfur, selenium or tellurium. Aluminum or gallium chalcogenide acts to increase the covalent bonding network structure of the glass with the result being that excellent high temperature 8-14 micron IR transmitting glasses with transition temperatures above 500° C. are prepared.
Inventors
- 👤 Steve W. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:50
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/32; C03C3/321; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A chalcogenide glass having a range of infrared transmission, consisting essentially of: a glass mixture of the formula: MX+M 2 3 +SiX 2 , wherein M is .sub. a metal selected from the group consisting of calcium, strontium, barium, zinc and lead, M' is a metal selected from the group consisting of aluminum and gallium and X is selected from the group consisting of sulfur, selenium and tellurium; the mole percent of MX is within the range of from about 5% to about 70%, the mole percent of M 2 'X 3 is within the range of from about 5% to about 70%, and the mole percent of SiX 2 is within the range of from about 10% to about 90%, and the glass has a T g of at least 500° C.
Claim 2
Dependent Claim
133 words
A chalcogenide glass having a range of infrared transmission, consisting essentially of: a glass mixture of the formula: MX+M 2 3 +SiX 2 , wherein M is .sub. a metal selected from the group consisting of calcium, strontium, barium, zinc and lead, M' is a metal selected from the group consisting of aluminum and gallium and X is selected from the group consisting of sulfur, selenium and tellurium; the mole percent of MX is within the range of from about 5% to about 70%, the mole percent of M 2 'X 3 is within the range of from about 5% to about 70%, and the mole percent of SiX 2 is within the range of from about 10% to about 90%, and the glass has a T g of at least 500° C.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein the amount of MX is from about 10 mole percent to about 45 mole percent.
Claim 4
Dependent Claim
24 words
The composition of claim 1 wherein the amount of M 2 ' 3 is from about 10 mole percent to about 45 mole percent.
Claim 5
Dependent Claim
22 words
The composition of claim 1 wherein the amount of SiX 2 is from about 10 mole percent to about 80 mole percent.
Claim 6
Dependent Claim
18 words
The composition of claim 1 wherein the T g is from about 500° C. to about 800° C.
Claim 7
Dependent Claim
16 words
The composition of claim 1 wherein the infrared transmission range is ˜8 microns to ˜14 microns.
Claim 8
Dependent Claim
16 words
The composition of claim 6 wherein the infrared transmission range is ˜10 microns to ˜14 microns.
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