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US 12,492,142 B2Granted
Glass compositions, glass articles, and methods of making the same
AssigneeThe Penn State Research Foundation
InventorsCarly Jean Mathewson, John Christopher Mauro, Venkatraman Gopalan, John Victor Badding
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Abstract
Disclosed herein are glass compositions, articles made from the disclosed glass compositions, and methods of making the same. More specifically, disclosed herein is a glass composition comprising from about 10 to about 14 mol % of K2O; from 0 to about 4 mol % of CaO; from about 14 to about 18 mol % of Al2O3; and from about 66 to about 74 mol % SiO2.
Claims16
A glass fiber composition comprising:
- a) from equal to or greater than 11.2 to 14 mol % of K2O;
- b) from 0 to 4 mol % of CaO;
- c) from 14 to 18 mol % of Al2O3;
- and
- d) from 66 to 74 mol % SiO2;
- wherein the glass composition exhibits a coefficient of thermal expansion from 5.5 ppm/° C. to 9 ppm/° C. averaged over a temperature range from 20° C. to 300° C., and a glass transition temperature Tg from 720° C. to 1,000° C.
3 more elements
An article comprising:
- a) a core layer having a predetermined thickness;
- and
- b) a cladding layer having a predetermined thickness and wherein the cladding layer surrounds the core layer and wherein the cladding layer comprises a glass composition comprising:
- i) from equal to or greater than 11.2 to 14 mol % of K2O;
- ii) from 0 to 4 mol % of CaO;
- iii) from 14 to 18 mol % of Al2O3;
- and
- iv) from 66 to 74 mol % SiO2;
- wherein the glass composition exhibits a coefficient of thermal expansion from 5.5 ppm/° C. to 9 ppm/° C. averaged over a temperature range from 20° C. to 300° C. and a glass transition temperature Tg from 720° C. to 1,000° C.;
- and
- wherein the cladding layer exhibits a coefficient of thermal expansion that is substantially similar to a coefficient of thermal expansion of the core layer.
8 more elements
An article comprising:
- a) a core layer having a predetermined thickness;
- and
- b) a cladding layer having a predetermined thickness and wherein the cladding layer surrounds the core layer and wherein the cladding layer comprises a glass composition comprising:
- i) from equal to or greater than 11.2 to 14 mol % of K2O;
- ii) from 0 to 4 mol % of CaO;
- iii) from 14 to 18 mol % of Al2O3;
- and
- iv) from 66 to 74 mol % SiO2;
- v) greater than 0 mol % to 1 mol % of a fining agent, wherein the fining agent comprises a sulfate salt, chloride salt, iodide salt, bromide salt, a metallic oxide, or a combination thereof, wherein the metallic oxide comprises CeO2, SnO2, Fe2O3, As2O3, Sb2O3, MnO2, or a combination thereof;
- and
- wherein the glass composition exhibits a coefficient of thermal expansion from 5.5 ppm/° C. to 9 ppm/° C. averaged over a temperature range from 20° C. to 300° C. and a glass transition temperature Tg from 720° C. to 1,000° C.
8 more elements
Dependencies are inferred from the claim text.