Glass fiber having compositions of alumina-lanthana and made from undercooled molten materials
US6484539B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1998 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Jul 8, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a method for drawing fibers from materials which exhibit low viscosities at the equilibrium melting temperature. Further, the present invention provides novel drawn fibers from materials which were thought to be incompatible with a fiber-drawing process. The present invention also provides a means of minimizing recrystallization of molten materials during fiber drawing. Still further, the present invention provides novel drawn fibers with a greater tensile strength and greater concentrations of additives as compared to prior art fibers. Lastly, the present invention provides a means for producing crystalline fibers with controlled chemical compositions, and fibers with high tensile strengths as compared to prior art fibers of the same composition. The present invention achieves these objectives by heating the desired materials until a liquid melt is formed, undercooling the melt until the proper viscosity is reached, initiating fiber drawing by inserting a “stinger” into the molten material, then finally drawing the fibers at the desired speed so that fibers of the desired composition and diameter are formed. If desired, crystalline fibers…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.